Re: [Emc-users] OT Arduino program question.
There is a recently formed Yahoo group called Sherlinearduino for the purpose of designing and building a power feed for Sherline lathes. It is a 'design by committee' project, but there is some interesting discussion. It has only been running a month or so, so there is not much useful work yet. ron ginger __ Information from ESET NOD32 Antivirus, version of virus signature database 5030 (20100415) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com -- Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT Arduino program question.
There is some code here which might be useful... http://forums.reprap.org/read.php?13,29815 or here http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?action=print;num=1231909180 Ian Ian W. Wright Sheffield UK -- Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT Arduino program question.
On 14 April 2010 20:49, Greg Bentzinger wrote: > I want to use an Arduino to run the thing, but I have not found much info in > the area of programing accell curves for the step/dir outputs. Have a look in the EMC2 source for the Limit3 HAL module. I think that position goes in, and velocity/accel modified position comes out. I have not actually used it though. -- atp -- Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT Arduino program question.
Same here. I have some AVR code that may do what you want. I don't know
what it will take to convert it to arduino. It's part of the controller for
my rotary table. There's a link to the source at the bottom.
http://www.franksworkshop.com.au/Workshop/RotaryTable/RotaryTable.htm
The code is based on the algorithm posted on the yahoo "geckodrive" group.
Look in "Files" | "G100 and G101". There are algorithms for linear
(MOVEAXIS.gif ) and S curve (ramp in S out.gif ) acceleration.
Disclamer: It's some of the worst code I've written, but it mostly works
(changing on the fly is buggy)
> -Original Message-
> From: Bernhard Kubicek [mailto:bernhard.kubi...@gmail.com]
> Sent: Thursday, 15 April 2010 6:21 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] OT Arduino program question.
>
> I don't do Arduino, I do ATMEGAs with GCC.
> Anyway, I would try to create a timer interrupt. Before
> starting the timer, it is possible to set a starting value
> for the counters. In the interrupt vector routine, one could
> set each time a new increasing/decreasing starting value, to
> create ramps.
> Or, alternatively, one could do something like this:
> uint16_t max=100,min=0,c;
> for (c=min;c {
> _delay_us(c);
> set_your_softPWMpins();
> }
> At least AVR-GCC.
> With arduino and java(?) i have less clue..
> greetings,
> bernhard
>
>
> On 4/14/2010 9:49 PM, Greg Bentzinger wrote:
> > Hello List;
> >
> > I have a simple machine that needs a single axis control to
> rotate a crank shaft 220 degrees then back. I plan to use a
> NEMA 34 stepper and a Gecko for the motion. I will mount
> large XL pulleys on the crank and use about a 5:1 reduction ratio.
> >
> > Limit at one end of the stroke home at the other.
> >
> > I want to use an Arduino to run the thing, but I have not
> found much info in the area of programing accell curves for
> the step/dir outputs.
> >
> > I need to program ramp to max, move xxx steps, ramp down to
> a very slow speed for the last 30 degrees, stop and dwell
> then ramp to max back to home and stop.
> >
> > I have been searching the Arduino forms and most examples
> are for users actually trying to control the phase outputs of
> drives they have built on "shields". Also these users believe
> in "Instant acceleration" they just start a pulse stream with
> no ramp up. Floppy drive steppers turning tape flags can
> kinda get away with that, but I'm driving a load on a Nema 34
> and I don't want to pound the crap out of the works.
> >
> > My plan goes like this:
> >
> > Digital Inputs:
> >
> > a} Home switch
> > b} Limit switch
> > c} Jog forward
> > d} Jog reverse
> > e} Start
> > f} menu ?
> >
> > Digital Outputs
> >
> > a} Direction
> > b} step
> >
> > Analog Input - Potentiometer as feed override 0-100%
> >
> > Estop will be all hardware so its not an issue.
> >
> > I ask here because I know a few users have been toying with
> the Arduino for use as a cheap micro PLC to work with EMC2.
> >
> > I'm just looking for a few lines of code that show how to
> insert accell / decell ramps into the sketch.
> >
> > I will end up mounting a degree wheel on the crankshaft and
> adding or subtracting steps as required for best use.
> >
> > Right now it is all done by hand with a lever. I expect
> running by hand is faster - but slow and steady wins the race
> and operator ( that would be me) fatigue is always a factor
> in actual production output.
> >
> >
> > And because Enquiring minds will want to know... The
> application is a 1964 model (San Diego) Star Lube sizer. :)
> With all the extra bells and whistles (almost), Base heater,
> Lube pressure system and bullet feeder.
> >
> > Maybe later I can build a mini Puma robot to sort them.
> >
> > Thanks all.
> >
> >
> >
> --
> > Download Intel® Parallel Studio Eval Try the new
> > software tools for yourself. Speed compiling, find bugs
> proactively,
> > and fine-tune applications for parallel performance.
> > See why Intel Parallel Studio got high marks during beta.
> > http://p.sf.net/sfu/intel-sw-dev
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
>
>
> -
Re: [Emc-users] OT Arduino program question.
I don't do Arduino, I do ATMEGAs with GCC. Anyway, I would try to create a timer interrupt. Before starting the timer, it is possible to set a starting value for the counters. In the interrupt vector routine, one could set each time a new increasing/decreasing starting value, to create ramps. Or, alternatively, one could do something like this: uint16_t max=100,min=0,c; for (c=min;c Hello List; > > I have a simple machine that needs a single axis control to rotate a crank > shaft 220 degrees then back. I plan to use a NEMA 34 stepper and a Gecko for > the motion. I will mount large XL pulleys on the crank and use about a 5:1 > reduction ratio. > > Limit at one end of the stroke home at the other. > > I want to use an Arduino to run the thing, but I have not found much info in > the area of programing accell curves for the step/dir outputs. > > I need to program ramp to max, move xxx steps, ramp down to a very slow speed > for the last 30 degrees, stop and dwell then ramp to max back to home and > stop. > > I have been searching the Arduino forms and most examples are for users > actually trying to control the phase outputs of drives they have built on > "shields". Also these users believe in "Instant acceleration" they just start > a pulse stream with no ramp up. Floppy drive steppers turning tape flags can > kinda get away with that, but I'm driving a load on a Nema 34 and I don't > want to pound the crap out of the works. > > My plan goes like this: > > Digital Inputs: > > a} Home switch > b} Limit switch > c} Jog forward > d} Jog reverse > e} Start > f} menu ? > > Digital Outputs > > a} Direction > b} step > > Analog Input - Potentiometer as feed override 0-100% > > Estop will be all hardware so its not an issue. > > I ask here because I know a few users have been toying with the Arduino for > use as a cheap micro PLC to work with EMC2. > > I'm just looking for a few lines of code that show how to insert accell / > decell ramps into the sketch. > > I will end up mounting a degree wheel on the crankshaft and adding or > subtracting steps as required for best use. > > Right now it is all done by hand with a lever. I expect running by hand is > faster - but slow and steady wins the race and operator ( that would be me) > fatigue is always a factor in actual production output. > > > And because Enquiring minds will want to know... The application is a 1964 > model (San Diego) Star Lube sizer. :) With all the extra bells and whistles > (almost), Base heater, Lube pressure system and bullet feeder. > > Maybe later I can build a mini Puma robot to sort them. > > Thanks all. > > > -- > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
