Re: [Emc-users] arguments to use

[Cathrine Hribar]

On Thu, 06 Nov 2014 11:43:41 -0700
  Sebastian Kuzminsky  wrote:
> On 11/6/14 10:54 AM,  Cathrine Hribar wrote:
>>
>> Does anyone know where I can find a list of the arguments to use in "while,
>> if,and sub statements? With an explanation of their functions???
> 
> http://linuxcnc.org/docs/2.6/html/gcode/o-code.html
> 
> 
> -- 
> Sebastian Kuzminsky

thanks for the info, it helps a lot.

Bill
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Re: [Emc-users] arguments to use

[Cathrine Hribar]

Does anyone know where I can find a list of the arguments to use in "while, 
if,and sub statements? With an explanation of their functions???

Thanks
Bill

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Re: [Emc-users] parallel to usb connect

[Cathrine Hribar]

On Tue, 28 Oct 2014 23:06:49 -0600
  Sebastian Kuzminsky  wrote:
> Greetings LinuxCNC people, I bring you glad tidings!
> 
> One of the things we did at the recent Hackfest in Houston was creating 
> the 2.7 branch.  We will test and stabilize the code in this branch, and 
> when the time is right we will release 2.7.0.  I'm hopeful that the time 
> until 2.7.0 is released is on the order of a handful of months.
> 
> The headline features in 2.7 are:
> 
> * A new high-speed trajectory planned (written by Rob Ellenberg)
> * Support for the RT-Preempt realtime kernel (written by Jeff Epler)
> 
> In addition to the new RT-Preempt support, LinuxCNC 2.7 will run on RTAI 
> and the vanilla Linux kernel just like 2.6 and earlier versions do.
> 
> We are currently targeting the same set of Linux distributions for 2.7 
> as we did for 2.6: Ubuntu Lucid, Ubuntu Precise, and Debian Wheezy.  The 
> final set of supported distros may change as we get closer to release.
> 
> This new branch does not mean that 2.6 will go away.  I will keep 
> maintaining the 2.6 branch and making releases as needed.  Your CNC 
> machines running LinuxCNC 2.6 will stay supported with bug fixes for a 
> good long while still.
> 
> 
> So, you're asking, how can I help?  I'm glad you asked!  You can run the 
> 2.7 pre-releases and submit bug reports!  There are probably some rough 
> edges and possibly lurking bugs that we'd like your help in finding 
> before we release 2.7.0.  You've been warned!
> 
> 
> The install instructions leave a lot to be desired at the moment, but it 
> goes like this:
> 
> * Install LinuxCNC 2.6, for example using the instructions here:
> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?UpdatingTo2.6
> 
> * Upgrade to LinuxCNC 2.7 by picking an apt source line from here:
> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?UpdatingTo2.7


Is their any chance that LCNC will be able to connect through usb port in near 
future??

Bill
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Re: [Emc-users] subject change....

[Cathrine Hribar]

On Fri, 10 Jan 2014 04:03:28 -0700
  Gregg Eshelman  wrote:
> On 1/10/2014 3:14 AM, Mark Wendt wrote:



Gregg:  U seem to know a lot about resources,  i have need to replace an 
encoder reader on a HP servo i have.  Do u know where to obtain such an 
thing???
Thanks for the info.

Bill

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Re: [Emc-users] vertical help, hi

[Cathrine Hribar]

Hi Gene:

Tried to send u an e-mail but they said it was to big!!!

Don't know what that means, anyway to carry on I need a larger Z axis stepper 
and will look on ebay.

tnx  Bill

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Re: [Emc-users] vertical help, hi

[Cathrine Hribar]

> 
> If I has several more, yes, but I only have one left and its a triple stack 
> 425.  So I'd druther hang onto it for spares.  The 252's are 'double stack' 
> so a bit shorter.
> 
> Where are you going to put it, send me a PM with a pix or 3 if you've the 
> time.  And I do have some 50 oz singles with an oddball footprint if you 
> just wanted to watch them spin for testing.
> 
> Cheers, Gene


Hi Gene:

I need a motor that i can use on my cnc z axis.  I have 8 wire, vry small 
bypolar motors, about 70oz I think, on it now.  the z axis won't start 
dependabily no matter what i set the specs at. It will work in testing, but as 
soon as I try to do a job it loose steps.

  I am going through a complete redesign. But in the meanwhile I need to use 
the old machine to do the work.  I can't send any pictures today, but will 
tomorrow.

Just need to get through this.  Must have motors at 250oz or better, I think.

I am going to servos with the rebuild.

Bill

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Re: [Emc-users] vertical help, hi

[Cathrine Hribar]

On Fri, 22 Feb 2013 21:28:49 -0500
  Gene Heskett  wrote:
> On Friday 22 February 2013 21:19:02 Cathrine Hribar did opine:
> 
>> Hi Gene:
>> 
>> How many volts and amps do u have to supply to ur Z axis 3 stack
>> stepper?
>> 
>> I need more torque!
>> 
>> Bill
> 
> I'm using the 2M542 driver brick, set at the motors top amps which is for 
> the motor wired series (they are 8 wire motors) of about 2.9 amps.  Voltage 
> on the lathe is unregulated, about 38 or 39 volts, and 28 volts regulated 
> on the mill.
> 
> These motors were originally from xylotek as part of a 3 or 4 motor kit (i 
> bought a 3 first, with 252oz motors, then a 4 pack with 425 oz motors, but 
> the xylotex boards have long since smoked even if they weren't old enough.
> 
> I haven't measured working force on the lathe yet with its new ball screw 
> in the Z, but the redesigned Z axis on the mill can push the bathroom 
> scales to 155 lbs, so drilling a hole is definitely not a problem.
> 
> Cheers, Gene


Hi Gene:

Tnx for the info.  Is the 252oz motors 3 stack also?  Would you be willing to 
sell one of them? That would allow me to test my rig.  I don't need as much 
force as u do so I think a motor of that size would do.

My controller will produce almost the same volt/amp as u describe.

Bill

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Re: [Emc-users] vertical help, hi

[Cathrine Hribar]

Hi Gene:

How many volts and amps do u have to supply to ur Z axis 3 stack stepper?

I need more torque!

Bill

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Re: [Emc-users] C Compiler - MPLAB

[Cathrine Hribar]

On Sat, 21 Jul 2012 17:15:32 -0400
  "Kent A. Reed"  wrote:
> On 7/21/2012 4:46 PM, Cathrine Hribar wrote:
>>
>>
>> On Fri, 20 Jul 2012 23:07:09 -0400
>>"Kent A. Reed"  wrote:
>>> On 7/20/2012 10:10 PM, Cathrine Hribar wrote:
>>>> On Mon, 16 Apr 2012 14:47:49 -0400
>>>> Erik Friesen  wrote:
>>>>> On Mon, Apr 16, 2012 at 2:33 PM, Dave  wrote:
>>>>>
>>>>>> On 4/16/2012 1:15 PM, Erik Friesen wrote:
>>>>>> http://embeddedfun.blogspot.com/2011/05/installing-mplabx-on-ubuntu-1104.html
>>>>>>> ...
>>>>>>>
>>>> Hi Erik:
>>>>
>>>> Well I have MPLAB-X running on Ubuntu 11.10, thanks to you.
>>>>
>>>> My problem is that I still can't get my pickit2 to be seen by MPLABX.  It 
>>>> is
>>>> listed, along with Pickit3, in the Tool Selector list under Project
>>>> Properties.
>>>>
>>>> The Pickit 2 shows up with two yellow dots in front but the Pickit 3 shows
>>>> up
>>>> with two red dots.
>>>>
>>>> According to the talk on Embedded Fun site, that means that Java don't have
>>>> all the 32bit libraries it needs to support the pk2.
>>>>
>>>> Anyway, I thought I would download the libraries with "sudo apt-get install
>>>> ia32-libs. That's the command they gave on the site anyway.
>>>>
>>>> Well of course, it didn't work.  The flag comes back, "file deleted or
>>>> missing."  Can you suggest any other place I can find these 32bit 
>>>> libraries?
>>>>
>>>> Bill
>>>>
>>> Bill:
>>>
>>> I haven't tried this myself, but I see a link to downloadable files for
>>> Oneric Ocelot (e.g., Ubuntu 11.10) on
>>> https://launchpad.net/ubuntu/+source/ia32-libs
>>>
>>> Regards,
>>> Kent
>>>
>> Hi Kent:
>> Thanks for the info.  Went to the site and downloaded some stuff, will see
>> what I get.
>>
>> Bill
>>
> 
> Bill, I didn't ask if you are running a 32-bit or 64-bit version of 
> Ubuntu. (I don't actually want to know but) I noticed that somewhere 
> along the timeline of the 11.x releases of Ubuntu there was a 
> repackaging of the ia32-libs; for example there is now metapackage 
> ia32-libs-multiarch. I don't pretend to understand what was done but 
> apparently it is supposed to help one deal with the differences between 
> the two platforms. Only you can judge.
> 
> I agree with Erik Friesen that you're much more likely to get good 
> answers by posting these questions to the appropriate microchip forum. 
> They may not know LinuxCNC but they know tons more that we do about 
> MPLABX and about using it on Ubuntu.
> 
> Hope your board lights up soon.
> 
> Regards,
> Kent
> 
Thanks Kent for the update.

will look at that.

I bought the Pickit2 before I started with MPLABX.  They said that it would 
run on mt Windows 2000. Not!

I will get a Pickit3 sometime in future.  Don't have much confidence in this 
as of yet!!\\Bill
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Re: [Emc-users] C Compiler - MPLAB

[Cathrine Hribar]

On Fri, 20 Jul 2012 23:07:09 -0400
  "Kent A. Reed"  wrote:
> On 7/20/2012 10:10 PM, Cathrine Hribar wrote:
>>
>> On Mon, 16 Apr 2012 14:47:49 -0400
>>Erik Friesen  wrote:
>>> On Mon, Apr 16, 2012 at 2:33 PM, Dave  wrote:
>>>
>>>> On 4/16/2012 1:15 PM, Erik Friesen wrote:
>>>> http://embeddedfun.blogspot.com/2011/05/installing-mplabx-on-ubuntu-1104.html
>>>>> ...
>>>>>
>> Hi Erik:
>>
>> Well I have MPLAB-X running on Ubuntu 11.10, thanks to you.
>>
>> My problem is that I still can't get my pickit2 to be seen by MPLABX.  It is
>> listed, along with Pickit3, in the Tool Selector list under Project
>> Properties.
>>
>> The Pickit 2 shows up with two yellow dots in front but the Pickit 3 shows 
>>up
>> with two red dots.
>>
>> According to the talk on Embedded Fun site, that means that Java don't have
>> all the 32bit libraries it needs to support the pk2.
>>
>> Anyway, I thought I would download the libraries with "sudo apt-get install
>> ia32-libs. That's the command they gave on the site anyway.
>>
>> Well of course, it didn't work.  The flag comes back, "file deleted or
>> missing."  Can you suggest any other place I can find these 32bit libraries?
>>
>> Bill
>>
> 
> Bill:
> 
> I haven't tried this myself, but I see a link to downloadable files for 
> Oneric Ocelot (e.g., Ubuntu 11.10) on 
> https://launchpad.net/ubuntu/+source/ia32-libs
> 
> Regards,
> Kent
> 
Hi Kent:
Thanks for the info.  Went to the site and downloaded some stuff, will see 
what I get.

Bill

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Re: [Emc-users] C Compiler - MPLAB

[Cathrine Hribar]

On Mon, 16 Apr 2012 14:47:49 -0400
  Erik Friesen  wrote:
> On Mon, Apr 16, 2012 at 2:33 PM, Dave  wrote:
> 
>>
>> On 4/16/2012 1:15 PM, Erik Friesen wrote:
>> >
>> http://embeddedfun.blogspot.com/2011/05/installing-mplabx-on-ubuntu-1104.html
>> >
>> > http://microchip.wikidot.com/mplab:install-on-linux-bin
>> >
>> > On Mon, Apr 16, 2012 at 12:42 PM, Cathrine Hribar> >wrote:
>> >
>> >
>> >>
>> >>
>> >> Hi  Erik:
>> >>
>> >> well i downloaded MPLAB X from microchip.
>> >>
>> >> Tried to run the install program but the Ubuntu system says that I don't
>> >> have
>> >> the software installed needed to run the MPLAB X install file.
>> >>
>> >> Any suggestions of what I need to get and where to get it?
>> >>
>> >> Thanks:
>> >>
>> >> Bill
>> >>

Hi Erik:

Well I have MPLAB-X running on Ubuntu 11.10, thanks to you.

My problem is that I still can't get my pickit2 to be seen by MPLABX.  It is 
listed, along with Pickit3, in the Tool Selector list under Project 
Properties.

The Pickit 2 shows up with two yellow dots in front but the Pickit 3 shows up 
with two red dots.

According to the talk on Embedded Fun site, that means that Java don't have 
all the 32bit libraries it needs to support the pk2.

Anyway, I thought I would download the libraries with "sudo apt-get install 
ia32-libs. That's the command they gave on the site anyway.

Well of course, it didn't work.  The flag comes back, "file deleted or 
missing."  Can you suggest any other place I can find these 32bit libraries?

Bill
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Re: [Emc-users] "While/Do cammands"

[Cathrine Hribar]

Thanks for the answer Andy, I found the problem and all is working...

Bill

On Wed, 6 Jun 2012 16:53:53 +0100
  andy pugh  wrote:
> On 6 June 2012 16:38, Cathrine Hribar  wrote:
> 
>> have run into a problem trying to do a loop.  when I use the sample in the
>> manual of the While/Do command, the computer goes into a constant loop, I
>> think.
> 
> If the WHILE condition never goes false, then the loop (and the
> preview) will run for ever.
> You can break the preview loop, I think it is ESC or CTRL-C. Though it
> might take some time to take effect.
> 
> Unfortunately the computer can't know whether your loop is valid. (
> http://en.wikipedia.org/wiki/Halting_problem ) so will just blindly
> loop for ever.
> 
> Have a look at your code and make sure that you are not using the loop
> condition variable for something else inside the loop, and that it
> reaches the termination condition. GT and LT are much less likely to
> cause problems than EQ. Even values which look the same to the
> displayed precision will fail the EQ test if they differ in the
> umpteenth decimal place.
> 
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Re: [Emc-users] "While/Do cammands"

[Cathrine Hribar]

Hi John:

Thanks for the feedback!

I have found my mistake and all is working as should be.

Will look at ur new example, too.

Bill

On Thu, 07 Jun 2012 06:13:16 -0500
  John Thornton  wrote:
> Bill,
> 
> While the Do While example in the manual does work, unless you changed 
> it, it's not very graphic. I have changed the example to give some feed 
> back if you test run the code. Within an hour or so the online docs 
> should have the improved example.
> 
> John
> 
> On 6/6/2012 10:38 AM,  Cathrine Hribar wrote:
>> Hi Andy:
>> have run into a problem trying to do a loop.  when I use the sample in the
>> manual of the While/Do command, the computer goes into a constant loop, I
>> think. no flags appear, the machine just doesn't complete the command.
>>
>> can't make this work, HELP?
>>
>> Bill
>>
>>
>>> atp
>>> If you can't fix it, you don't own it.
>>> http://www.ifixit.com/Manifesto
>>>
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Re: [Emc-users] "While/Do cammands"

[Cathrine Hribar]

Hi Andy:
have run into a problem trying to do a loop.  when I use the sample in the 
manual of the While/Do command, the computer goes into a constant loop, I 
think. no flags appear, the machine just doesn't complete the command.

can't make this work, HELP?

Bill


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Re: [Emc-users] C Compiler - MPLAB

[Cathrine Hribar]

>>
>> On 4/16/2012 1:15 PM, Erik Friesen wrote:
>> >
>> http://embeddedfun.blogspot.com/2011/05/installing-mplabx-on-ubuntu-1104.html
>> >
>> > http://microchip.wikidot.com/mplab:install-on-linux-bin
>> >
>> > On Mon, Apr 16, 2012 at 12:42 PM, Cathrine Hribar> >wrote:
>> >
>> >
>> >>
>> >>
>> >> Hi  Erik:
>> >>
>> >> well i downloaded MPLAB X from microchip.
>> >>
>> >> Tried to run the install program but the Ubuntu system says that I don't
>> >> have
>> >> the software installed needed to run the MPLAB X install file.
>> >>
>> >> Any suggestions of what I need to get and where to get it?
>> >>
>> >> Thanks:
>> >>
>> >> Bill
>> >>
>> >>


Hi Eric:

The web sites u gave for embeddedfun.blogspot.com, was the best help I've 
gotten so far.  It has allowed me to install MPLABX.

I followed the advice and got "GIT"  what do I need this for?

My MPLABX still don't see my pickit 2 though!

Bill


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Re: [Emc-users] C Compiler - MPLAB

[Cathrine Hribar]

Hi  Erik:

well i downloaded MPLAB X from microchip.

Tried to run the install program but the Ubuntu system says that I don't have 
the software installed needed to run the MPLAB X install file.

Any suggestions of what I need to get and where to get it?

Thanks:

Bill

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Re: [Emc-users] C Compiler

[Cathrine Hribar]

> Well, feel free to ask questions.  The microchip forums can be rather
> daunting to get some of the basic questions answered.  At first, the
> biggest challenge is just to get a project that will compile.
> 
> If you already have a hex file, you can load it into the windows pickit2
> loader, and you don't need to run mplab at all.

thanks Erik for the info and offer, I am sure there will be some questions.

> 
> On Fri, Mar 23, 2012 at 9:56 PM, Cathrine Hribar wrote:
> 
>>
>>
>> On Tue, 20 Mar 2012 06:51:38 -0400
>>  Erik Friesen  wrote:
>> > I don't know whether you'll have to switch or not.  You can still try
>> > mplabx, but it may take some effort to get everything going.  You can
>> turn
>> > in a support ticket now, its just whether or not you want to spend the
>> time
>> > getting it going.  Personally, after an initial test, I am letting others
>> > go through the headache before I try again.  The IDE is much better
>> though,
>> > so I am using the IDE and debugging with 8.
>> >
>> > Why did you pick the 30 series?  I prefer the 33 series, although they
>> are
>> > 3.3 volts.  The ADC's on the 30 series don't seem very linear to me.
>>  Most
>> > new development seems to be with the 33 series.
>>
>>
>> Hi Erik:
>>
>> I may just load this stuff up on my xp machine and do what I need.
>>
>> Your dealing with a complete amateur here.  I am not a programmer, yet, at
>> least with the dspic's.  I am building a servo board that someone else
>> designed and wrote a c program for.
>>

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Re: [Emc-users] C Compiler

[Cathrine Hribar]

On Tue, 20 Mar 2012 06:51:38 -0400
  Erik Friesen  wrote:
> I don't know whether you'll have to switch or not.  You can still try
> mplabx, but it may take some effort to get everything going.  You can turn
> in a support ticket now, its just whether or not you want to spend the time
> getting it going.  Personally, after an initial test, I am letting others
> go through the headache before I try again.  The IDE is much better though,
> so I am using the IDE and debugging with 8.
> 
> Why did you pick the 30 series?  I prefer the 33 series, although they are
> 3.3 volts.  The ADC's on the 30 series don't seem very linear to me.  Most
> new development seems to be with the 33 series.


Hi Erik:

I may just load this stuff up on my xp machine and do what I need.

Your dealing with a complete amateur here.  I am not a programmer, yet, at 
least with the dspic's.  I am building a servo board that someone else 
designed and wrote a c program for.

While I have wrote several programs, long ago. Back then, I was writing 
instructions for a coordinate measurement machine called a cordex.  These 
instructions were in the form of very early numerical control format.
The numerical controlled milling centers, that were in the shop, used the same 
type of punched paper tape my machine did, for recording the program, but the 
commands for their machines were g code and mine was not. A few years after I 
moved to Florida and opened my art studio, I realized that the stuff I was 
writing was not much different than basic.  Bendex corp. changed the format of 
the commands, but I think that is all it was. If I wanted to read the code for 
errors, I had to have the terminal print it, no monitor.

I am a man in a cardboard box, in the middle of the river, without a paddle!


Bill

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Re: [Emc-users] C Compiler

[Cathrine Hribar]

On Mon, 19 Mar 2012 14:55:56 -0400
  Erik Friesen  wrote:
> I don't think so.  For some reason the developers left the pickit2 behind
> with X.  What chip series will you be using?

I will try to work with the dspic30f4012. I am feeling my way through the dark 
and, like you, have hit a few walls. I wish I had known about the difference 
in the usb ports before I bought the pickit 2 debug...


> 
> I haven't had good results with my windows machine.  I have a real ice and
> icd3, but neither have played well with X.  The advantage to a pickit3 is
> that it is HID style usb, so you don't have to run a custom driver.
>
microchip list the pickit 2  to work with windows 2000 sp4.  I have 3 
different machines that are windows 2000 and none can see the pickit 2.

One of the guy's suggested that I use windows xp.  May have to switch.

Bill
  
> On Mon, Mar 19, 2012 at 12:59 PM, Cathrine Hribar 
>wrote:
> 
>>
>>
>>
>>
>>
>> > I'm not kirk, but have you tried mplabX?  I'd say the pickit3 will work
>> the
>> > best with mplabX currently.



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Re: [Emc-users] C Compiler

[Cathrine Hribar]

  
> I'm not kirk, but have you tried mplabX?  I'd say the pickit3 will work the
> best with mplabX currently.

Hi Erik:

I have down loaded mplab x.

Have you worked with mplab x and pickit 2, or 3??

I have pickit 2 and was woundering if it could be made to work under Linux 
with mplab x.

Thanks:

Bill





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Re: [Emc-users] C Compiler - MPLAB

[Cathrine Hribar]

Hi Erik:

Thanks for the info, we always used "X" to represent the latest version 
number.

Will download MPLAB X today.

Bill

On Fri, 9 Mar 2012 08:05:04 -0500
  Erik Friesen  wrote:
> Mplab 8.8 isn't linux compatible.  You need
> mplabX
> 

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Re: [Emc-users] C Compiler - MPLAB

[Cathrine Hribar]

> If you plan on using a Windows environment, then you can use Microchip's
> MPLAB PIC IDE and several different C compilers, all freeware.  MPLABX
> <...>
 Hi Doug:

 Thanks for the info...  I just received the pickit 2 debug from microchip.
 Have the latest v. of MPLAB.  Problem is that my software system is Windows
 2000 with SP4.  The pickit 2 software doesn't see the pickit 2 hardware
 pluged
 into the USB port. I know the port works.

 thanks:

 Bill


>>> Bill:
>>>
>>> You do know how old Windows 2000 is in technology-years? Microsoft
>>> terminated support two years ago.
>>>
>>> Sorry, I just had to get that out of my system :-)
>>>
>>> Did you have administrator privileges when you installed the driver?
>>> Without a functioning driver, Windows 2000 won't admit your pickit
>>> exists even if the port itself is electrically sound. Your smart drive
>>> test was necessary but not sufficient. It exercises a different driver.
>>>
>>> Were I in your shoes, I'd install MPLAB X IDE in Linux and drive on
>>> rather than arm-wrestle with W2K. To paraphrase what Admiral Farragut
>>> never exactly said, "Damn the bugs, full speed ahead."
>>>
>>> Regards,
>>> Kent
>>
>> Hi Kent:
>>
>> Thanks for the note.
>>
>> I am aware of the age of Windows 2000 as I used it in my business of 
>>computer
>> animation in S. W. Florida.  That was up to 2005 before I retired.
>>
>> I agree it is a pain but sense I am retired and this is a hobby, I used what 
>>I
>> had on hand, as MPLAB listed the system software could be Windows 2000 or 
>>XP.
> 
> Hi, Bill.
> 
> My wife and I are retired as well and fully understand the financial 
> constraints. We choose to forgo many technology baubles in order to 
> spend more in other pursuits, like staying involved in our grandkids' lives.
> 
> My wife, for example, is still using a Sony laptop we bought when she 
> was consulting a decade ago. She likes the full keyboard so much she 
> doesn't want to buy a new laptop. We're running Windows 2000 on it 
> because that's the latest version that has working drivers for it.
> 
>> I put that Query on this web site about two weeks ago, asking if there was a
>> complier that would work for programming the dspic's, under Linux.  One of 
>>the
>> fellows said that there was a compiler but it was a pain to get all the 
>>files,
>> in place, that was needed to use it under Linux..  Being the novice that I 
>>am,
>> not being a programmer, I thought it would be more of a challenge than I 
>>could
>> overcome with my limited knowledge.
>>
>> However, I think I will give it a try as I like the Linux operating system
>> much better that Windows. It reminds me of the Amiga operating system that I
>> use to use for model building, ray tracing, and animation recording.
> 
> Oh, man, a Amiga user. You really were serious about animation work. I 
> never had one but I drooled over the one my friend (also in video and 
> animation work) had. I have neither the eye nor the temperament for 
> graphics work. I envy those who do.
> 
>> If I need some direction, are you willing to lend a bit of help once in a
>> while?
> 
> I and the rest of the LinuxCNC crowd are always available to kibitz. 
> Collectively, we know everything (and if it turns out we don't we can 
> still sympathize with you!).
> 
> What direction did you decide to go---MPLAB or MPLAB X? And in Linux 
> directly or in Windows running as a virtual host in Linux?
> 
> Of course, inquiring minds also want to know what you have in mind for 
> those dspics.
> 
> 
>> Bill
>>
> 
> Good luck.
> 
> Regards,
> Kent

Hi Kent:

Yes we are all for the grand kids too!

Well I think I will go with Linux. The MPLAB I have just downloaded was 8.80.

I purchased the Pickit 2 debug.  The project is a brushed servo controller. 
 Knowing me I think it will go beyond that, maybe BLDC. Then who knows what.

Well Kent back in 1985  my wife and I opened an Amiga store in Florida. 
Because I used it for 3 D wire frame modeling, in my Architectural 
Illustration business. I thought it would really catch on.  She and I went to 
Commodore's repair school so we could support the machine.

We were authorized Video Toaster retaillers.

Opened a larger store in a strip shopping center about 1989.  I ran both 
businesses from that location.  About the time we got rolling the Hi-way dept. 
started tearing up the main hi-way that went in front of our center. And the 
first war started.  Mail order got going real strong and we were doomed.
I could buy Commodore Hi-res monitors from mail order cheaper than I could buy 
from Commadore direct and we were authorized retailers with them. I hate loop 
holes!!

It was a great machine, 1 main processor and 5 sub-processors. Multitasking 
for real and all on 512K ram.  I networked the Amiga, with the Windows NT4.0, 
and the MAC Quadra 950, for all animation and video recording. Play back 
recording directly to Beta-cam in real

Re: [Emc-users] C Compiler - MPLAB

[Cathrine Hribar]

On Fri, 02 Mar 2012 23:14:03 -0500
  "Kent A. Reed"  wrote:
> On 3/2/2012 10:32 PM,  Cathrine Hribar wrote:
>>
>> On Fri, 02 Mar 2012 15:04:54 -0500
>>Doug Goff  wrote:
>>> Bill,
>>> If you plan on using a Windows environment, then you can use Microchip's
>>> MPLAB PIC IDE and several different C compilers, all freeware.  MPLABX
>>> is a new platform that is still a bit buggy, though usable.  And it will
>>> run under Linux.  I use the PICKit 3 to program PICs, no problem.  I use
>>> it in a Windows environment because I also need to program FTDI chips
>>> (USB) and they don't offer a Linux version.  I run all Windows within
>>> VirtualBox, so I don't have to transfer files around between systems.
>>>
>>> Google MPLAB and you should get the microchip site, or
>>> http://ww1.microchip.com/downloads/mplab/X/
>> Hi Doug:
>>
>> Thanks for the info...  I just received the pickit 2 debug from microchip.
>> Have the latest v. of MPLAB.  Problem is that my software system is Windows
>> 2000 with SP4.  The pickit 2 software doesn't see the pickit 2 hardware 
>>pluged
>> into the USB port. I know the port works.
>>
>> thanks:
>>
>> Bill
>>
>>
> Bill:
> 
> You do know how old Windows 2000 is in technology-years? Microsoft 
> terminated support two years ago.
> 
> Sorry, I just had to get that out of my system :-)
> 
> Did you have administrator privileges when you installed the driver? 
> Without a functioning driver, Windows 2000 won't admit your pickit 
> exists even if the port itself is electrically sound. Your smart drive 
> test was necessary but not sufficient. It exercises a different driver.
> 
> Were I in your shoes, I'd install MPLAB X IDE in Linux and drive on 
> rather than arm-wrestle with W2K. To paraphrase what Admiral Farragut 
> never exactly said, "Damn the bugs, full speed ahead."
> 
> Regards,
> Kent


Hi Kent:

Thanks for the note.

I am aware of the age of Windows 2000 as I used it in my business of computer 
animation in S. W. Florida.  That was up to 2005 before I retired.

I agree it is a pain but sense I am retired and this is a hobby, I used what I 
had on hand, as MPLAB listed the system software could be Windows 2000 or XP.

I put that Query on this web site about two weeks ago, asking if there was a 
complier that would work for programming the dspic's, under Linux.  One of the 
fellows said that there was a compiler but it was a pain to get all the files, 
in place, that was needed to use it under Linux..  Being the novice that I am, 
not being a programmer, I thought it would be more of a challenge than I could 
overcome with my limited knowledge.

However, I think I will give it a try as I like the Linux operating system 
much better that Windows. It reminds me of the Amiga operating system that I 
use to use for model building, ray tracing, and animation recording.

If I need some direction, are you willing to lend a bit of help once in a 
while?

Bill


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Re: [Emc-users] Need 1/4" shaft to keyed 10mm bushing

[Cathrine Hribar]

On Fri, 2 Mar 2012 13:47:40 -0500
  gene heskett  wrote:
> On Friday, March 02, 2012 01:24:42 PM Cathrine Hribar did opine:
> 
>> On Thu, 1 Mar 2012 21:23:11 -0500
>> 
>>   gene heskett  wrote:
>> > Rather than inline the carriage drive screw, with will leave the motor
>> > hanging out quite a ways on the left end of this lathe, I could save
>> > about 3" if I mounted the motor to the bed on another piece of 1/4"
>> > alu plate, such that a gear on the motor shaft would engage a gear on
>> > the lead screw.
>> > 
>> > I bought a set of steel change gears before I got the bug to put
>> > motors on this thing, so it looks as if I can drive a 65T on the lead
>> > screw with a 35T on the motor, an 8 wire 425 that says 5 amps on it,
>> > but I suspect that is a per coil, one at a time rating.  I am only
>> > using about 2.40 amps on the Z axis for the mill and it certainly
>> > seems to be enough when the coils are wired in series.  I can put 155
>> > lbs on a bath scale with it, which is a heck of an improvement over
>> > that same motor driving the old, back of the post screw and tapping
>> > the motor out at 5 lbs showing on the same scale.
>> > 
>> > Anyway, is there such a 'hub' I can buy, or am I doomed to try & make
>> > it?
>> 
>> Hi Gene:
>> 
>> For years I was unable to make things like that, if u need some one to
>> make it, and can't do it your self, I will help.  I can do castings and
>> machine stuff like that and it's fun!
>> 
>> show me a drawing or hand sketch.
>> 
>> Bill  WA0WWN
> 
> What I have in mind is locating the center of the existing keyed hole in 
> the gear, drilling 3 holes around it for 10-24 screws at 120 degree 
> intervals, then taking a ball nose to bore it for a tapered hole, then make 
> the corresponding Browning Taperlock hub insert.  Only about 10% of the 
> size Browning usually makes.
> 
> I am continually amazed at watching a 9" dual belt pulley, mounted to a 
> 1.25" shaft with such a hub, sitting there running for 50 years & countless 
> belts and 2 or 3 pulley replacements because they wear too, with edge 
> wobbles of perhaps 2 or 3 thou if the bolts are equally torqued.  Because 
> the hub needs to be slightly crush able when its drawn in, I don't see 
> opening up the 10mm hole far enough to remove the vestiges of the key slot, 
> leaving the hubs tapered walls thin, just enough to establish the taper 
> angle the full thickness of these 10mm thick gears.
> 
> My major fit problem would be in making the 1/4" hole in the hub to a 
> sufficiently accurate .2505" to get a good fit on the 425oz motors shaft.  
> Probably by mic'ing my ball noses and using one of them for a drill bit as 
> I know my drill doctor isn't able to grind a drill's nose accurately enough 
> to prevent runout and an oversized hole.  Going in with smaller mills means 
> a tapered hole, not a workable situation IMO.
> 
> I'd drill a smaller pilot hole for the ball nose of course.  That is likely 
> my first experiment this afternoon, to see if I can actually drill a hole 
> to that accuracy level.  If I can, then I think I am off to the races.
> 
> If that fails, I might take you up on that offer Bill, thank you.
> 
Gene:
sounds like you know more about machining than I do. Good luck with that man.
Bill


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Re: [Emc-users] C Compiler - MPLAB

[Cathrine Hribar]

On Fri, 02 Mar 2012 15:04:54 -0500
  Doug Goff  wrote:
> 
> Bill,
> If you plan on using a Windows environment, then you can use Microchip's 
> MPLAB PIC IDE and several different C compilers, all freeware.  MPLABX 
> is a new platform that is still a bit buggy, though usable.  And it will 
> run under Linux.  I use the PICKit 3 to program PICs, no problem.  I use 
> it in a Windows environment because I also need to program FTDI chips 
> (USB) and they don't offer a Linux version.  I run all Windows within 
> VirtualBox, so I don't have to transfer files around between systems.
> 
> Google MPLAB and you should get the microchip site, or 
> http://ww1.microchip.com/downloads/mplab/X/

Hi Doug:

Thanks for the info...  I just received the pickit 2 debug from microchip. 
Have the latest v. of MPLAB.  Problem is that my software system is Windows 
2000 with SP4.  The pickit 2 software doesn't see the pickit 2 hardware pluged 
into the USB port. I know the port works.

thanks:

Bill


> Hope this helps
> 
> Doug Goff
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Re: [Emc-users] C Compiler

[Cathrine Hribar]

  Ben
> 
> SDCC is terrible at generating PIC code.  I can't speak for it in general,
> but I've never compiled more than the most trivial program without running
> into critical bugs in the output (like mis-setting the bank).
> 
> The availability of an AVR GCC target is one of the reasons I switched to
> AVR.  I don't regret it at all.
> 

Hi Ben:

thanks for the info. What is an AVR?

Bill

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Re: [Emc-users] C Compiler

[Cathrine Hribar]

  Erik Friesen  wrote:
> I'm not kirk, but have you tried mplabX?  I'd say the pickit3 will work the
> best with mplabX currently.
> 
> On Fri, Mar 2, 2012 at 12:54 PM, Cathrine Hribar wrote:
> 

Hi Erik:
Can u tell me where I can find the program, mplabX?

I just purchased the pickit 2 debug.  It arrived two weeks ago. I had a heck 
of a time to get the pickit 2 program to show up on the pc.  The system 
software on my pc is windows 2000 sp4.  Now that the pickit 2 program shows up 
and can be opened I get a flag that states that the program can't find the 
pickit 2 hardware thats pluged into the USB port. I thought that maybe the USB 
ports were not working but when I plug a USB smart drive into the USB port 
next to the pickit 2 it shows up like it should.

Thanks Erik, for the feed back.

Bill


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Re: [Emc-users] Need 1/4" shaft to keyed 10mm bushing

[Cathrine Hribar]

On Thu, 1 Mar 2012 21:23:11 -0500
  gene heskett  wrote:
> Rather than inline the carriage drive screw, with will leave the motor 
> hanging out quite a ways on the left end of this lathe, I could save about 
> 3" if I mounted the motor to the bed on another piece of 1/4" alu plate, 
> such that a gear on the motor shaft would engage a gear on the lead screw.
> 
> I bought a set of steel change gears before I got the bug to put motors on 
> this thing, so it looks as if I can drive a 65T on the lead screw with a 
> 35T on the motor, an 8 wire 425 that says 5 amps on it, but I suspect that 
> is a per coil, one at a time rating.  I am only using about 2.40 amps on 
> the Z axis for the mill and it certainly seems to be enough when the coils 
> are wired in series.  I can put 155 lbs on a bath scale with it, which is a 
> heck of an improvement over that same motor driving the old, back of the 
> post screw and tapping the motor out at 5 lbs showing on the same scale.
> 
> Anyway, is there such a 'hub' I can buy, or am I doomed to try & make it?

Hi Gene:

For years I was unable to make things like that, if u need some one to make 
it, and can't do it your self, I will help.  I can do castings and machine 
stuff like that and it's fun!

show me a drawing or hand sketch.

Bill  WA0WWN


> 
> Thanks guys.
> 
> Cheers, Gene
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> soap, ballot, jury, and ammo. Please use in that order."
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> my advice.
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Re: [Emc-users] C Compiler

[Cathrine Hribar]

Hi Kirk:

Would u happen to know of a free ware compiler to use to program PIC's under 
linux?

Thanks:

Bill

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Re: [Emc-users] steppers

[Cathrine Hribar]

On Mon, 16 Jan 2012 16:28:58 -0500
  gene heskett  wrote:
> On Monday, January 16, 2012 04:07:22 PM Cathrine Hribar did opine:
> 
>> Hi Gene:
>> 
>> Could you give me some idea of what the advantage is of using 2 and 3
>> stack steppers?  You seem to know a lot and I hope you don't mind me
>> asking dumb questions.
>> 
>> Thanks
>> 
>> Bill
>> 
> 
> As I see it, its a tradeoff, you can get torque approaching a nema 34 motor 
> in the nema 23 size form, that because the armature has a smaller OD, can 
> probably run at faster accelerating rates than the larger nema 34.  Weight 
> hanging on the end of the table looks like it might be less, even with the 
> so-called triple stack, longer & therefore heavier motors. In my case, 
> figuring out how to make couplings that are shorter would have allowed me 
> to put mine closer to the end of the tables, reducing the lever arm of the 
> weight whose cg is likely a good 6" outward.  Moving that inward an inch 
> and a half would I'm sure make a detectable improvement.
> 
> All this is pure opinion however, and there are folks here on this list 
> that can stand on much firmer ground when they write on the subject.  OTOH, 
> it also seems to me that the nema 34 motor should be a wee bit more 
> efficient in terms of amps in vs oz/in out.  But I'd expect one can get 
> arguments started just on that aspect alone.
> 
> An true expert I am not at this, I am a 100% self taught (and poor teacher 
> at times too) retired tv broadcast engineer with only a GED, CET on the 
> wall.  And a degree UHK (University of Hard Knocks) since I'm only 30 miles 
> from them & had a few bucks to spare.
> 
> There are some decent tutorials on steppers available on the net, many of 
> which I think start at a bit too basic a level, but they do fairly well 
> cover the subject.  But I'd also expect that you've done that bit of 
> homework already.
> 
> Cheers, Gene


Thanks for ur reply..

are u saying that the nema 34 would be equal to a nema 23 three stack?

Bill

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Re: [Emc-users] steppers

[Cathrine Hribar]

Hi Gene:

Could you give me some idea of what the advantage is of using 2 and 3 stack 
steppers?  You seem to know a lot and I hope you don't mind me asking dumb 
questions.

Thanks

Bill

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Re: [Emc-users] steppers

[Cathrine Hribar]

On Fri, 13 Jan 2012 15:22:26 -0500
  gene heskett  wrote:
> On Friday, January 13, 2012 03:00:21 PM Cathrine Hribar did opine:
> 
>> Hi Gene:
>> 
>> Tnx for the info on ur steppers.
>> 
>> I have 8 wire steppers and have wired them series.  From what you said
>> about your steppers, and controller, you wired in parallel, true?
>> 
>> My controller is, like yours, 2.8 amp limit. As I think about it, if the
>> steppers are wired in series, like I wired mine, they would require
>> twice as much current to give the most torque, right?.
> 
> No Bill, wired in series, that is the current that flows through both coils 
> so you get 2x the magnetic field.
> 
> Wired in parallel, it would need twice the current, because it would be 
> split between the 2 coils, each getting half the set current then, or 1.4 
> amps.  OTOH, the parallel wiring would, at a given supply voltage, be able 
> to run the motor nearly twice as fast at that same supply voltage, since 
> you would then have the full voltage across each coil.  You would need a 
> slightly bigger supply in terms of amps, and a driver you could turn up to 
> 5.6 amps in order to get the best torque that speed.  On The Third Hand, 
> its likely that the motor would run under the typical load, faster when 
> wired parallel, but a little drag will stall it easier too.
> 
> The torque output would be lower but flatter, controlled by the available 
> current, with the fade knee starting at the applied voltage vs torque 
> intersection on the graph.
> 
> It is also something I haven't experimented with a lot since my Z axis was 
> made to drive a drill bit, I can put 150 lbs of push on a stubborn bit 
> wired in series at 5"/min feed rates with low (200 or so) spindle rpms 
> cutting a decent sized continuous string out of the hole.
> 
>> I use to think I understood what I was doing, but I find with age
>> understanding don't always increase.
> 
> Its painfully obvious to me at my years too Bill, it goes with the number 
> of calendars thrown out on our watches.  77 so far for me.
> 
> Thanks Bill.
> 
> Cheers, Gene
> -- 


Tnx Gene for the feedback.

Well I wired the steppers series when I set up the system.  I guess I was 
hoping for more from these little motors.

Ur wright, too many calendars, I've had 69 this year and only one heart 
attack!!

thanks for the help

Bill

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Re: [Emc-users] steppers

[Cathrine Hribar]

On Fri, 13 Jan 2012 16:59:48 -0500
  Ed Nisley  wrote:
> On Fri, 2012-01-13 at 10:09 -0700, Cathrine Hribar wrote:
>> if the steppers are wired in series, like I wired mine, 
>> they would require twice as much current 
> 
> Having waded through this mess not too long ago, here's what I (think I)
> know...
> 
> Putting the two halves of a single pole's winding in series doubles the
> number of turns, doubles the winding resistance, and increases the
> inductance by a factor of four.
> 
> Doubling the turns doubles the magnetic flux density in the pole, which
> is easier to see with the old-school unit of Ampere-turn instead of the
> fancy-pants metric Gauss or Tesla. Because torque is proportional to
> magnetic flux, you should get twice the torque for the same current.
> 
> Unfortunately, the armature will probably saturate because you're now
> running it at twice its design flux, which will kill the torque and
> perhaps the motor, too. That's not a desirable outcome, so,
> paradoxically, a motor rated at 2.8 A per winding should run at 1.4 A
> with two windings in series.
> 
> The resistive power losses would double at the same current, but will go
> down by a factor of 2 at half that current. If the motor has enough
> magnetic headroom, you can reduce the current by 1/sqrt(2) to dissipate
> the same amount of power: 2.8 A * 0.707 = 2 A.
> 
> The increased inductance increases the overall L/R rise time by a factor
> of 4, assuming the external circuit is supplying substantial resistance
> (as in antique L/5R DC drives with hulking power resistors). With modern
> current-limiting chopper drivers, however, the rise time depends mostly
> on the winding's internal resistance, which increases by a factor of 2,
> so the net L/R increases by a factor of only 4/2 = 2.
> 
> So, with the series-wired windings connected to the same supply voltage,
> the current rise time doubles. If you were pushing the motor's upper
> speed limit, the torque will fall off because the current reaches the
> limit set by the driver much later in each microstep. In the worst case,
> it no longer reaches the limit at all.
> 
> It's enough to make your (well, my) head spin...
> 
> -- 
> Ed
> http://softsolder.com


Hi Ed:

What u wrote makes a lot of sense...  While I don't have the equpment here at 
my shop to check the torque that I used at work,  I did some expearmenting 
with the amp adj. control.  When I increased from 1.8 to 2 amps the torque 
felt liked it doubled while holding the hand wheel.
> 
> 



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Re: [Emc-users] steppers

[Cathrine Hribar]

On Fri, 13 Jan 2012 17:48:42 +
  andy pugh  wrote:
> On 13 January 2012 17:09, Cathrine Hribar  wrote:
> 
>> My controller is, like yours, 2.8 amp limit. As I think about it, if the
>> steppers are wired in series, like I wired mine, they would require twice as
>> much current to give the most torque, right?.
> 
> No. In series you get twice the current through each winding as you do
> in parallel for the same total current.
> You also get twice the back-EMF, so less speed, but more torque.
> 
> -- 
> atp
> The idea that there is no such thing as objective truth is, quite simply, 
>wrong.
>


Thanks Andy for the info!!!

Bill

  
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Re: [Emc-users] steppers

[Cathrine Hribar]

Hi Gene:

Tnx for the info on ur steppers.

I have 8 wire steppers and have wired them series.  From what you said about 
your steppers, and controller, you wired in parallel, true?

My controller is, like yours, 2.8 amp limit. As I think about it, if the 
steppers are wired in series, like I wired mine, they would require twice as 
much current to give the most torque, right?.

I use to think I understood what I was doing, but I find with age 
understanding don't always increase.

Thanks

Bill

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Re: [Emc-users] ur steppers

[Cathrine Hribar]

Hi  gene

Wanted to ask where you found your steppers?

I see that they pull 6 amps, what is the voltage and size?

Thanks

Bill

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Re: [Emc-users] adobe-acrobat

[Cathrine Hribar]

  Lester:

Where do I find LibraOffice?
  Merry Christmas!
  

Thanks:

Bill WA0WWN



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Re: [Emc-users] adobe-acrobat

[Cathrine Hribar]

Hi Andy:

do u know of any software that can be used on our machines that will make  and 
save PDF files like Adobe Acrobat?

Merry Christmas!

Bill

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Re: [Emc-users] web conection

[Cathrine Hribar]

On Sun, 27 Nov 2011 22:39:46 +
  andy pugh  wrote:
> On 27 November 2011 22:17, Cathrine Hribar  wrote:
> 
>> Do u have your EMC2 computer connected to the web through a wireless 
>>router??
> 
> They both are.
> 
> The heart of the system is a Linksys WRT 54G. That has been re-flashed
> with the after-market "Tomato" firmware, as that supports WDS.
> http://www.ebay.com/sch/i.html?_from=R40&_trksid=p5197.m570.l1313&_nkw=wrt54g&_sacat=See-All-Categories
> http://www.polarcloud.com/tomato
> The EMC2 machine in the garage connects via ethernet to an Apple
> Airport Express (the plug-top one)
> ( http://reviews.zdnet.co.uk/i/z/rv/2004/10/airport-i1.gif )
> and the other machine is connected via a very cheap Tenda WR311R+
> http://www.amazon.com/Tenda-W311R-150Mbps-Wireless-Broadband/dp/B0041BYKRS/ref=sr_1_1?ie=UTF8&qid=1322433429&sr=8-1
> 
> The trick is to get a main router that supports WDS , and client
> routers that can connect.

tnx Andy for the help, i was sure u would know.

bill


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Re: [Emc-users] web conection

[Cathrine Hribar]

Andy:

Do u have your EMC2 computer connected to the web through a wireless router??

If so which one?

Thanks bill


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Re: [Emc-users] source for washers

[Cathrine Hribar]

Hi Dave:

Tnx for reply.

The transmission I just took apart had them in it on tapered roller bearings 
with snap ring, that was out of a Honda 4x4. I assumed that they were for 
pre-load. Don't have room in my spindle assembly for th'd nut.

Bill

On Thu, 25 Aug 2011 17:46:37 +0100
  Dave Caroline  wrote:
> wavy washers are used for end float control for normal bearing, not
> seen them used for taper roller
> 
> Dave Caroline
> 
> On Thu, Aug 25, 2011 at 5:24 PM, Cathrine Hribar  
>wrote:
>>
>>
>> Hi:
>>
>> Was wondering if you, or anyone on here has a source for wavy spring 
>>washers?
>> The ones used to load taper roller bearings.
>>
>> I called my local bearing house here and he don't know what I am talking
>> about!!!
>>
>> Thanks:
>>
>> Bill
>>
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Re: [Emc-users] source for washers

[Cathrine Hribar]

Thanks to all who replied; Bill


On Thu, 25 Aug 2011 15:02:58 -0700
  Neil  wrote:
> Several names I know -- Belleville washers, spring washers, disc  
> springs or wave springs.
> 
> In the US, other than the usual McMaster, check www.rotorclip.com ,  
> www.leespring.com , www.smalley.com .
> 
> Depending on the size you want, you might also find these at  
> www.mscdirect.com .
> 
> Cheers,
> -Neil.
> 
> 
> 
> Quoting gene heskett :
> 
>> On Thursday, August 25, 2011 02:34:37 PM Cathrine Hribar did opine:
>>
>>> Hi:
>>>
>>> Was wondering if you, or anyone on here has a source for wavy spring
>>> washers? The ones used to load taper roller bearings.
>>>
>>> I called my local bearing house here and he don't know what I am talking
>>> about!!!
>>>
>>> Thanks:
>>>
>>> Bill
>>>
>> Nomenclature maybe, Bill.  I think they are usually called Belleview or
>> similar.  Or am I confused, ISTR those spring load not by being wavy, but
>> by being dished?  The dished version would probably be the stronger force,
>> at reduced travel.
>>
>> Cheers, gene
> 
> 
> 
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Re: [Emc-users] source for washers

[Cathrine Hribar]

Hi:

Was wondering if you, or anyone on here has a source for wavy spring washers?
The ones used to load taper roller bearings.

I called my local bearing house here and he don't know what I am talking 
about!!!

Thanks:

Bill

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Re: [Emc-users] CNC4PC Servo controllers

[Cathrine Hribar]

  
> The Allegro manual may shed more light on it:
> http://www.allegromicro.com/en/Products/Part_Numbers/3977/3977.pdf 
> 
> I don't have a lot of experience with steppers, my mill was a working
> system from the factory, so it "just works". I have been playing with a
> small stepper and an L298 driver, and had some success but I haven't
> come up with a tuning strategy. Your step/dir driver is more complex. It
> is a micro stepping driver, so the number of sub-steps per normal step
> is selectable. The decay setting seems to allow the drivers to behave
> differently for different sub-steps. I haven't read through the
> datasheet, but it didn't look too terribly obvious.
> 
> This link seems to have some information:
> http://www.piclist.com/techref/io/stepper/hipwrbp-gm.htm 
> 
> Bipolar steppers are driven by h-bridges. The H refers to the normal
> schematic representation of this kind of circuit. The driver is an array
> of four transistors or, more simply, switches. The direction of current
> through a stepper coil is controlled by turning on the top right, top
> left, bottom left and bottom right switches so that the current goes
> forward or in reverse. There are two coils, so there are two h-bridges
> to control one motor.
> http://en.wikipedia.org/wiki/H-bridge 
> 
> With the details being pretty complex, it may be best if someone with
> experience chimes in with a rule of thumb on how to select a proper
> decay setting. It may be that the setting will only make a few percent
> difference. From what little I've read, it may affect the noise and
> efficiency at certain step rates, or help slightly with slipping at
> intermediate step rates, but this is a guess. If this is the case, it
> may be that just trying different settings and keeping the ones that
> help may be the way to go.
> 
> What is the voltage of the motor power supply? The datasheet says the
> driver is rated for 37 Volts, so it would be nice to have the supply
> voltage close to that. The power supply should have a large capacitor,
> or a pair of them. They shouldn't bulge a all, If they do, they may be
> on their way out.


Hi Kirk:

Just a note to tell u that I took ur suggestion and ordered ball screws for my 
mill.  That means that I have to make a few more castings and do a lot of 
machining.

I downloaded the info from Allegro. That provided a lot of info and I now 
understand what I'm trying to do. Thanks for the info!

While working my way through the redesign, I will use the steppers I have and 
see how much the new screws help.

To answer ur question, the power supply is 32 volts @ 6 amps. The caps. are 
new 1000 uf. @ 50 volts, I used two of them. That is what the manual I got 
with the controller called for. It also talks about heat sinks and a fan to 
cool the chips.  I included the fan at time of the install of the stepper 
board. I will now install the heat sinks also.

I am going to have to use reduction, ( 4 to 1 ), to drive the screws as they 
are 4 tpi. So I will change the micro step back to 1/2 step. That should give 
me more torque.

Will include a photo later.

Bill


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Re: [Emc-users] CNC4PC Servo controllers

[Cathrine Hribar]

Hi Kirk:

Have given your suggestion of tuning up the setup I have and will proceed 
toward that end.

I was wondering if u could tell me what this means: Setting PFD, "Adjustable, 
percent fast decay". The manual I got with my stepmaster stepper board says 
this should be adjusted for each axis. It doesn't say what it does or how it 
affects the operation of the stepping motors. Do u know what this is and how 
it would help me tweak the system?

Thanks for ur time;

Bill

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Re: [Emc-users] CNC4PC Servo controllers

[Cathrine Hribar]

Hi Kirk:

Thanks for ur interest in my project.

The reason that I am having to do something about my steppers is that my 
machine started off life as a toy, mini desktop.

I changed things and up graded the size of the whole machine so I could do 
real work with it.

The steppers I have are Bipolar, 1.8 amp. @ 30V.

The controller is from stepmaster. It can only handle 2.8 amps @ 30 volts, and 
I can't find any tuning info at all, on this drive, except for the manual I 
got with it when I bought it off e-bay.

Yes ball screws would be a great asset, but cost would be about $130 per axis, 
as far as I can tell.

All axis and screws turn freely. Yes, the weight of the  spindle head could be 
compensated for, but the small ampridge of the controller ends up being the 
weak link when considering up grading the steppers to proper size.

What would be the minimum that I would need from Mesa, as far as boards, to 
start building toward a 4 axis system with the least expense? They have so 
much that they offer, it becomes confusing.

One thing I don't understand; For a servo system, I need a servo amp, with a 
PWM card, because EMC doesn't generate the PWM signal fast enough nor can read 
the encoders fast enough, to keep up with the movement of the axis. So then, 
how does EMC control the process taking place? And if that's true, why would 
the step and direction board be a less advantage than the Mesa amp? Doesn't 
both boards take control of the operation using their own, separate, PID 
control?

Thanks, Bill









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Re: [Emc-users] CNC4PC Servo controllers

[Cathrine Hribar]

On Sat, 20 Nov 2010 15:49:27 -0800
  Kirk Wallace  wrote:
> On Sat, 2010-11-20 at 09:40 -0700, Catherine Hribar wrote:
>> Hi all:
>> 
>> Happy turkey day!
>> 
>> Does anyone in this group have experience with CNC4PC servo controllers?
>> 
>> I want to upgrade to encoders and this looks like the best so far.
>> 
>> Thanks:
>> 
>> Bill
> 
> Both of the drives I saw on the CNC4PC website are step/dir drives, so
> the encoders and tuning are handled in the drives. I think PWM
> amplifiers are a better match for EMC2, but you may need a high speed
> I/O for the encoders and PWM if you have a high resolution or high speed
> machine. mesanet.com and pico-systems.com have servo amps. The advantage
> is that you can use halscope/halmeter for tuning EMC2's PID and have a
> little more flexibility with HAL to get creative.

Hi Kirk:

thanks for ur feed back on servo amps.  I would like to take ur suggestion, 
but.

I looked at those amps and they require an enterface board, I think.
The problem is that I am short of money for this hobby and I have to improve 
my z axis.  the stepper i have on my cnc won't move the z axis with 
reliability. By buying step and direction amps i can add one servo and amp, at 
a time and get the benefit of encoder accuracy too, without changing all axis 
at once. Am i wrong in thinking that?

I have several computers I can choose from for this system. The high speed 
machine u referenced, were u talking about the computer, or an interface card.

As u can see, i don't know anything about servo systems.
If there is anyway u can see for me to do what u suggest, without adding 
another $100 or more, please let me know!

Again, happy turkey day!

Bill


  
> Kirk Wallace
> http://www.wallacecompany.com/machine_shop/
> http://www.wallacecompany.com/E45/index.html
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[Emc-users] CNC4PC Servo controllers

[Cathrine Hribar]

Hi all:

Happy turkey day!

Does anyone in this group have experience with CNC4PC servo controllers?

I want to upgrade to encoders and this looks like the best so far.

Thanks:

Bill



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Re: [Emc-users] scale/encoder

[Cathrine Hribar]

hi gene

would u share the size stepper motor u use, the type of controller u use and 
the current draw of the motors?

I remember looking at ur web page once and seeing a picture of ur z axis 
setup.

is that info still available???

thanks

Bill

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Re: [Emc-users] pico servo driver

[Cathrine Hribar]

On Thu, 21 Oct 2010 19:57:57 -0500
  Jon Elson  wrote:

HI John:

How much is the pico servo driver boards?

Do they require a brakeout board?

Thanks;

Bill


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Re: [Emc-users] OT: How to wire 220V motor on 110V

[Cathrine Hribar]

On Sun, 25 Jul 2010 13:57:04 -0500
  Jon Elson  wrote:
> Cathrine Hribar wrote:
>>
>> On Sat, 24 Jul 2010 23:18:28 -0400
>>   Gene Heskett 
>>
>>
.> No.  This sounds like a simple answer, but is really a "you can't even
> begin to compare the two types".
> A stepper motor produces the greatest torque at standstill, torque falls 
> off linearly as speed increases.
> A servo motor produces rated torque up to its maximum speed.  That's why 
> a stepper can be rated for 100 Watts shaft output, while a 
> similarly-sized brush or brushless motor can be rated for 400+ Watts.  
> The stepper draws current even when standing still, which is just a big 
> waste.  The servo only draws current when delivering power to a load.
> 
> Another problem with steppers is that they cannot run fast or they 
> overheat.  A typical servo motor can be run at 2000 RPM all day with no 
> problem.  A typical stepper will burn out if the shaft is spun at 1000 
> RPM, with no electrical connection at all.  The magnetics induces iron 
> losses in the motor and it gets hot.  This may happen in as little as 20 
> minutes!
> 
> Jon


Hi Jon:

thanks for the info on steppers / servos.

would u know of anyone who has a used servo amp for sale, I have a servo I 
picked up locally and would like to experiment with it.

thanks

Bill
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Re: [Emc-users] OT: How to wire 220V motor on 110V

[Cathrine Hribar]

On Sat, 24 Jul 2010 23:18:28 -0400
  Gene Heskett 


Hi Gene:

Thanks for explaining the diff. between those DC brushed motors. I understand 
most of what u wrote.

One more question, if u will.

Is a stepper motor as powerful as a servo if voltage & amp draw are the same?

Thanks again

Bill


>> > Cheers, Gene
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Re: [Emc-users] OT: How to wire 220V motor on 110V

[Cathrine Hribar]

Hi Gene:

hay the info u gave on the 220 motor was great,  I would like to know, if u 
have time, the dif. between a brushed DC motor and a brushed DC servo motor if 
the encoder were removed?

many thanks

BILL


> Cheers, Gene
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Re: [Emc-users] Hobbing: really cool

[Cathrine Hribar]

Hi Andy:

Just wanted to say thanks for showing ur video of hobbing. It inspires the 
rest of us to get off our a-- and do something.  did u make the indexing 
fixture your self??

Really cool:

Bill



On Sat, 3 Apr 2010 01:20:34 +0100
  Andy Pugh  wrote:
> On 3 April 2010 01:07, Frank Tkalcevic  wrote:
> 
>> G33 sounds more complicated.  Won't G33 have problems requiring the spindle
>> turning under power, being "at-speed", and then synching with index pulse?
> 
> The spindle definitely does not need to be under power or at-speed. I
> am not sure about the index pulse, but if it does then you only have
> to turn it far enough to get an index then align the clock.
> 
> I think G33.1 will wind back out (it is the tapping code) but I am not
> sure it will reverse more than once. It's not hard to find out though.
> 
> -- 
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Re: [Emc-users] accuracy question

[Cathrine Hribar]

Hi Gene:

Could you explain the proper use of the comp_1 backlash file usage??

I know that I don't understand how to use it properly!

many thanks:

Bill

On Sat, 27 Mar 2010 01:14:02 -0400
  Gene Heskett  wrote:
> On Friday 26 March 2010, Chris Reynolds wrote:
>>I have a quick question that I'm sure will be simple for one of the
>> members out there. I've been using emc now for about a year and I'm now
>> running it on my milling machine. I've got backlash set in the .ini file
>> but I've noticed now that when I'm cutting around a circle that it's not
>> coming out accurately. It's as if the motor when it changes direction
>> while cutting a curve or circle speeds up to take care of the backlash,
>> but then what's happening is that my cuts aren't coming out perfectly
>> round. Any suggestions?
>>
>> Chris
> 
> I've had that problem with my el cheapo  HF table topper, and found that I 
> needed to either adjust the split nuts to reduce the lash again, or fine 
> tune the backlash settings.  Even now, I can cut a socket for a ball bearing 
> and while I can see this reversal artifact, its been small enough that by 
> the third time I've pushed the bearing in and out while fitting other pieces 
> of the work, the reversal artifacts seem to be pretty well polished away.  I 
> can't find them with a caliper, .0002" dial, or a .0005" digital.  If you 
> can measure it, you may be able to adjust the backlash in the .ini file and 
> fix it, adding or subtracting half of what you can measure at any one time.
> 
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Re: [Emc-users] Stepper controller setup

[Cathrine Hribar]

>>By the way, your shop looks great...
>>
> Only to another hacker like me. ;)
> 
>


Hi Gene:

Thanks for the info.  I guess I'll do something like that.  My Z axis is the 
one I can't depend on.

just looked at your web site..  Boy you must be busy

I printed one of your .ngc files,  the one for the spindle encoder..

Do you have the rest of the stuff that that setup needs??  LIKE THE HAL and 
int. file and a drawing of sensor placement?

Would like to put that on my cnc spindle.

Bill


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Re: [Emc-users] Stepper controller setup

[Cathrine Hribar]

> 
> Nope, never fly.  See if superglueing some heat sinks to them might help, 
>and 
> in my case, I have a pair of old psu fans running on about 18 volts to they 
> really sing to you, one in each end of a box with the xylotex board in it, 
> the box just fitting the outside dimensions of the fans, one blowing in one 
> one end of the box, the other sucking out the other end, so I probably have 
>a 
> 20 mph breeze flowing across both sides of the pcb itself. I've had one fan 
> fail in about 5 years, so if you start with decent computer psu pulls that 
> claim to be ball bearing models, and it lasts 10 minutes at the higher 
> voltage, it should last 5-10 years.  I used 18 volts basically because that 
> was the only lower tap I had on the motor psu I built from an old Ampex 2" 
> videotape machine's drum motor power supply.  Its a boat anchor if it ever 
> fails...
> 
> Watch the electrolytic caps, the things in alu cans with plastic wrappers 
>but 
> bare tops.  If you see even a hint of bulging of the top of one of those, 
> replace them last week if not before.  I haven't read any horror stories 
> about those, yet.  But I am a retired C.E.T. and have been seeing problems 
> with those ever since switching power supplies, with their light weight and 
> high efficiencies causing a wholesale shift to their use for nearly 
> everything.
> 
> Switching power supplies however are _not_ good power supplies for this use, 
> they cannot absorb the energy recycling currents that flow in these chopper 
> stabilized drives without either letting the output voltages soar out of 
> spec, or seeing it as an error and doing a protective shutdown, usually in 
> the middle of the most intricate cut of the job.  Been there, done that, 
> built the linear, unregulated but huge output capacitance (75,000 uf, it was 
> handy in my junk box) rig I now use in self defense.  It hasn't even gotten 
> warm in 5 years of running 4 motors on my mill, sometimes for several days 
> straight.
> 
> In any event, I don't think I would, even with heat sinks and fans, push 
> those at above 2.0 amps/motor.  That limit will only effect, generally 
> speaking, the amount of force available at slow speeds.  Only more voltage 
> can get you above something like 20" a minute, and that will probably need 
> dampers on the motors to achieve that.  I'm at about 27.5, so I can go a wee 
> bit faster than the std 24 volt supply will get you to.  30 is pushing the 
> envelope and may let the smoke out of these chips.  I run at 2.5 amps, but 
> you could say I have extreme cooling too.
> 
>For motor dampers, there are several designs extant.  Mine are big fender 
> washers with sheet rubber between them in loose stacks, others have used 
> weighted skate wheels and such effectively too.  You can see mine, and I'm 
> sure others here will also give links to their designs, on the back ends of 
> the motors you can see in my mess at 
>, 
> that bypasses the front page but only shows you filenames, click to see in 
> most browsers.  Or you can take off the 'emc' and see me & the missus and 
> some smaller web sized pix.
> 
> Good luck. ;)
> 
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> -Ed Howdershelt (Author)
> 
> Some one needed the powerstrip, so they pulled the switch plug.
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Hi Gene:

Thanks for the insight.

yes I don't trust switchers. I am a ham radio opt. and so I build power 
supplies with xformers and the like.

I took a look at some of your pictures and was woundering what size your 
steppers are???

I know one of my problems are small steppers.  I was going to buy larger ones 
but haven't yet.  As I said before I want to be sure that the machine goes to 
the position it is sent to,  but I could get a great deal of money spent by 
starting all over using servos.

I also am retired and money is tight for hobby stuff.

By the way, your shop looks great...

Bill

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Re: [Emc-users] Stepper controller setup

[Cathrine Hribar]

On Sun, 28 Feb 2010 16:23:48 -0500
  Gene Heskett  wrote:
> On Sunday 28 February 2010, Cathrine Hribar wrote:
>>Hi All:
>>
>>I have a problem with my stepper driver board.  The board is made by
>>Stepmaster. Board # SOP-1 ver. 1.2
>>
>>I need steplen, stepspace, dirsetup, and dirhold.
>>
>>Can't get steppers to be reliable faster than Max. Vol. .3
>>
> The first link I found on Google doesn't bode well for making use of the 
> device, it will not stand up to the music seems to be the general consensus 
> of the postings I read on linuxcnc.  The Xylotex boards have far better 
> support and are much more convenient to use as they have their own B.O.B.
> 
> I have 2 myself, abide by the rules and my machine can move 25 ipm with a 
> 27.5 volt supply.
> 
> They are I believe the same allegro chip used on the xylotex boards, but 
> xylotex puts heat sinks on them and recommends plenty of air flow for full 
> output.  And they Just Work(TM).
> 
>>Anyone help?
>>
>>Thanks:
>>
>>Bill
>>
>>
>>---
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Hi Gene:

Thanks for the reply

yes I guess I should have used the Xylotex board, but now I have to work with 
what I have within reason.  If I do upgrade I will change to servos as I want 
to be sure that what I ask my cnc to do it will do it!!!

I made a index plate for a guy last summer and some of the holes were as much 
as .020 off!  Can't buy that.

Bill
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[Emc-users] (no subject)

[Cathrine Hribar]

Hi All:

I have a problem with my stepper driver board.  The board is made by 
Stepmaster. Board # SOP-1 ver. 1.2

I need steplen, stepspace, dirsetup, and dirhold.

Can't get steppers to be reliable faster than Max. Vol. .3

Anyone help?

Thanks:

Bill


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