[Emc-users] Feed/Rapid override physical knob selection

[Roland Jollivet]

On Sat, 27 Oct 2018 at 17:27, andy pugh  wrote:

> On Sat, 27 Oct 2018 at 15:38, Eric Keller  wrote:
>
> > The $20 MPG dials seem a
> > little large for a feed rate override.
>
> There are lots of 2-channel encoder switches in a potentiometer-like
> format.
> Typically 16 clicks per rev.
>
> There are BCD coded ones too, but they need more IO pins each (4)
> https://www.ebay.co.uk/itm/142979578446
>
>
I you use a volume pot with detents, going to an Arduino as Les said, then
you can do A/D and probably get the 'correct' value, as in the display will
show 100% because the pot is say 8k +- 200R

___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[andy pugh]

On Sat, 27 Oct 2018 at 15:38, Eric Keller  wrote:

> The $20 MPG dials seem a
> little large for a feed rate override.

There are lots of 2-channel encoder switches in a potentiometer-like format.
Typically 16 clicks per rev.

There are BCD coded ones too, but they need more IO pins each (4)
https://www.ebay.co.uk/itm/142979578446

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Gene Heskett]

On Saturday 27 October 2018 10:35:07 Eric Keller wrote:

> On Fri, Oct 26, 2018 at 9:43 AM Les Newell 
>
> wrote:
> > You can't have a pointer on an encoder because you have no way of
> > knowing where zero is.
> >
> > Can a quad encoder be initialized to a particular value? There would
> > be no
>
> reason to home it in this application if so.  The $20 MPG dials seem a
> little large for a feed rate override.

Good argument Eric, they are a bit large for that, but that does make 
them handy as crank subs on a cnc conversion. OTOH, hal can tie that 
together for those uses as its purely an incremental correction, 
functioning + or - from the default 100%. The dial markings will be out 
of sync, although some hal code could also fix that.

I fix and sync the jog dials by letting  the active time run out, then 
make the dial position the last 2 digits of the dro, then reactivate. 
Stays synched until you change the dial per step range next time.

> Eric Keller
> Boalsburg, Pennsylvania
>
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users



-- 
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Eric Keller]

On Fri, Oct 26, 2018 at 9:43 AM Les Newell 
wrote:

> You can't have a pointer on an encoder because you have no way of
> knowing where zero is.
>
> Can a quad encoder be initialized to a particular value? There would be no
reason to home it in this application if so.  The $20 MPG dials seem a
little large for a feed rate override.
Eric Keller
Boalsburg, Pennsylvania

___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Gene Heskett]

On Friday 26 October 2018 09:41:15 Les Newell wrote:

> You can't have a pointer on an encoder because you have no way of
> knowing where zero is.
>
> Les

Tactilly this is true, but its z index could use used to zero the hal 
representation. But not having a mechanical stop at that zero seems like 
an accident that WILL find a place to happen. That fellow Murphy can 
show up at the most damaging time. ;-)


> On 26/10/2018 13:42, Todd Zuercher wrote:
> > For the OCD like myself, the one machine I work with that has a
> > factory pot for feed override, is a pain to twiddle the knob to get
> > the control to show exactly 100% on the screen.  It's always a
> > little over or under.  I would very much prefer an encoder.  Just
> > because you have an encoder knob doesn't mean you can't have a
> > graphic on the knob like the photo you showed.  You just need to use
> > an encoder with a fine enough count to get the resolution you want
> > in the sweep area you'll use.


-- 
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[andy pugh]

On Fri, 26 Oct 2018 at 14:43, Les Newell  wrote:

> You can't have a pointer on an encoder because you have no way of
> knowing where zero is.

You could have a ring of LEDs on the encoder knob to form a virtual
pointer. (Serially addressed with slip-rings)

An LED next to each 10% mark is probably more practical.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Les Newell]

You can't have a pointer on an encoder because you have no way of 
knowing where zero is.


Les

On 26/10/2018 13:42, Todd Zuercher wrote:

For the OCD like myself, the one machine I work with that has a factory pot for 
feed override, is a pain to twiddle the knob to get the control to show exactly 
100% on the screen.  It's always a little over or under.  I would very much 
prefer an encoder.  Just because you have an encoder knob doesn't mean you 
can't have a graphic on the knob like the photo you showed.  You just need to 
use an encoder with a fine enough count to get the resolution you want in the 
sweep area you'll use.




___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Todd Zuercher]

For the OCD like myself, the one machine I work with that has a factory pot for 
feed override, is a pain to twiddle the knob to get the control to show exactly 
100% on the screen.  It's always a little over or under.  I would very much 
prefer an encoder.  Just because you have an encoder knob doesn't mean you 
can't have a graphic on the knob like the photo you showed.  You just need to 
use an encoder with a fine enough count to get the resolution you want in the 
sweep area you'll use.

Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street 
Dalton, Ohio 44618
Phone:  (330)828-2105ext. 2031

-Original Message-
From: Les Newell  
Sent: Friday, October 26, 2018 7:53 AM
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Feed/Rapid override physical knob selection

I use pots on all of my machines. Generally I have 3 pots, FRO, maximum feed 
and spindle override. The ADC is provided by an Arduino which controls all of 
my front panel buttons and talks to LCNC via Modbus over USB. I did put the 
code on the wiki many years ago but I just did a search and couldn't find it 
again. There do appear to be a few other Arduino Modbus examples out there. 
Doing it this way, my front panel just needs one USB cable going back to the 
control computer. This page 
<https://dereenigne.org/arduino/arduino-modbus-rtu-adc/> shows a simple Arduino 
example that reads analog inputs and spits them out over modbus. 
The MB2HAL module will handle the LinuxCNC side.

> too many pots don't have an absolute zero, and they can creep the 
> machine if left enabled.

I can't say I have experienced any issues with creep. I have had pots fail but 
if you use decent quality plastic track pots they last a very long time. I find 
it quite handy being able to tell at a glance what your feed rate 
override/spindle override etc is, no matter what LinuxCNC is doing at the time.

The only issue I have seen is that it can be a pain to get the pots initially 
synchronized. Halui seems to ignore pots until the first time you move them.

Les



On 26/10/2018 09:25, Gene Heskett wrote:
> Generally a Potentiometer, which will need an A/D in the interface to 
> read it. With an activate pushbutton so they time out.  Do that in 
> your hal file.
>
> Why? too many pots don't have an absolute zero, and they can creep the 
> machine if left enabled. One of the reasons I prefer the encoder, it 
> has receivers built into the mesa cards making the encoder simpler to 
> hack up the hal to use them, the machine stops dead when the dial 
> stops turning (might be some windup it has to use up first if you've 
> spun the dial too fast, so be ready to spin it the other way when its 
> going to run into something) and I still time it out in about a minute 
> after its last use.  Safety, safety.
>
> I use the encoder to set the jog size per count, all done in the hal 
> file, display the size of the jog per click in the axis gui using 
> pyvcp, a pusbutton enables that and the encoder dial is enabled when 
> the button is released, and a one shot to shut it all off about a 
> minute after the last "jog" move.
>



___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Les Newell]

I use pots on all of my machines. Generally I have 3 pots, FRO, maximum 
feed and spindle override. The ADC is provided by an Arduino which 
controls all of my front panel buttons and talks to LCNC via Modbus over 
USB. I did put the code on the wiki many years ago but I just did a 
search and couldn't find it again. There do appear to be a few other 
Arduino Modbus examples out there. Doing it this way, my front panel 
just needs one USB cable going back to the control computer. This page 
 shows a simple 
Arduino example that reads analog inputs and spits them out over modbus. 
The MB2HAL module will handle the LinuxCNC side.



too many pots don't have an absolute zero, and they can creep the
machine if left enabled.


I can't say I have experienced any issues with creep. I have had pots 
fail but if you use decent quality plastic track pots they last a very 
long time. I find it quite handy being able to tell at a glance what 
your feed rate override/spindle override etc is, no matter what LinuxCNC 
is doing at the time.


The only issue I have seen is that it can be a pain to get the pots 
initially synchronized. Halui seems to ignore pots until the first time 
you move them.


Les



On 26/10/2018 09:25, Gene Heskett wrote:

Generally a Potentiometer, which will need an A/D in the interface to
read it. With an activate pushbutton so they time out.  Do that in your
hal file.

Why? too many pots don't have an absolute zero, and they can creep the
machine if left enabled. One of the reasons I prefer the encoder, it has
receivers built into the mesa cards making the encoder simpler to hack
up the hal to use them, the machine stops dead when the dial stops
turning (might be some windup it has to use up first if you've spun the
dial too fast, so be ready to spin it the other way when its going to
run into something) and I still time it out in about a minute after its
last use.  Safety, safety.

I use the encoder to set the jog size per count, all done in the hal
file, display the size of the jog per click in the axis gui using pyvcp,
a pusbutton enables that and the encoder dial is enabled when the button
is released, and a one shot to shut it all off about a minute after the
last "jog" move.





___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Gene Heskett]

On Friday 26 October 2018 02:33:49 Tomaz T. wrote:

> I would prefere to have potentiometer style of knobs where I can
> include scale from 0-120%
>
>
> Like on this picture:
>
> https://www.dropbox.com/s/tc315af7ayee3gk/Rotary_switch.jpg?dl=0
>
>
> Are for this used potentiometer or encoder?
>
Generally a Potentiometer, which will need an A/D in the interface to 
read it. With an activate pushbutton so they time out.  Do that in your 
hal file.

Why? too many pots don't have an absolute zero, and they can creep the 
machine if left enabled. One of the reasons I prefer the encoder, it has 
receivers built into the mesa cards making the encoder simpler to hack 
up the hal to use them, the machine stops dead when the dial stops 
turning (might be some windup it has to use up first if you've spun the 
dial too fast, so be ready to spin it the other way when its going to 
run into something) and I still time it out in about a minute after its 
last use.  Safety, safety.

I use the encoder to set the jog size per count, all done in the hal 
file, display the size of the jog per click in the axis gui using pyvcp, 
a pusbutton enables that and the encoder dial is enabled when the button 
is released, and a one shot to shut it all off about a minute after the 
last "jog" move.

-- 
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Tomaz T .]

I would prefere to have potentiometer style of knobs where I can include scale 
from 0-120%


Like on this picture:

https://www.dropbox.com/s/tc315af7ayee3gk/Rotary_switch.jpg?dl=0


Are for this used potentiometer or encoder?

___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Gene Heskett]

On Thursday 25 October 2018 10:53:44 Przemek Klosowski wrote:

> On Wed, Oct 24, 2018 at 4:00 PM andy pugh  wrote:
> > I assume this one is waterproof when installed, but not inherently:
> > https://www.ebay.co.uk/itm/253300957997
>
> MPJA still has a $20 handwheel, nicely done:
>
> http://www.mpja.com/Handwheel-Digital-Encoder-100PPR-5VDC/productinfo/
>33106+MI
>
That is what I'm using as a single ended ABX but I've nothing on th 
X(index) terminals.  Just +A and +B. These are jog wheels, for XZ, not 
for spindles which does need the X for g33.1 and g76 type stuffs.

> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users



-- 
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Jon Elson]

On 10/25/2018 09:53 AM, Przemek Klosowski wrote:

On Wed, Oct 24, 2018 at 4:00 PM andy pugh  wrote:


I assume this one is waterproof when installed, but not inherently:
https://www.ebay.co.uk/itm/253300957997


MPJA still has a $20 handwheel, nicely done:

http://www.mpja.com/Handwheel-Digital-Encoder-100PPR-5VDC/productinfo/33106+MI

___

I used one of these to do an MPG pendant for my mill, it has 
worked quite well.
See  http://pico-systems.com/pendant.html  for some pictures 
(bottom pic is a similar encoder on a different machine, 
essentially identical to the MPJA encoder except for the 
label)  and info on how I wired it up and interfaced it 
through Hal.


Jon


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Przemek Klosowski]

On Wed, Oct 24, 2018 at 4:00 PM andy pugh  wrote:

> I assume this one is waterproof when installed, but not inherently:
> https://www.ebay.co.uk/itm/253300957997


MPJA still has a $20 handwheel, nicely done:

http://www.mpja.com/Handwheel-Digital-Encoder-100PPR-5VDC/productinfo/33106+MI

___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Gene Heskett]

On Thursday 25 October 2018 02:29:19 Tomaz T. wrote:

> >I cut too much. These are just examples, not recommendations.
> >
> >https://www.ebay.co.uk/itm/183476117151 >3476117151>
> > https://www.ebay.co.uk/itm/152204137441 >52204137441>
>
> I think in my case this kind of controls would be more suitable:
>
> https://1drv.ms/u/s!AsTjVWm3v2FThmzyEF6CuxRtAAHF
> [https://kwpsdg.by.files.1drv.com/y4mvNUYn0J1_Po5_E9pCsr5sdu_eqlnxvKoU
>RXOFew01q1EJ6w3fv25bXu1Wy6unrI0VoZC0i_VkpoA4HIIZAyLTy4ZCB1ZvIWoGBu96YUB
>B954msM6a8Erin6UY-A58P1d]
> 
> [https://kwpsdg.by.files.1drv.com/y4mvNUYn0J1_Po5_E9pCsr5sdu_eqlnxvKoU
>RXOFew01q1EJ6w3fv25bXu1Wy6unrI0VoZC0i_VkpoA4HIIZAyLTy4ZCB1ZvIWoGBu96YUB
>B954msM6a8Erin6UY-A58P1d] Do I need to look for "10 position rotary
> switch" or "Rotary encoder"?
>
I'd go for a rotary encoder, quadrature encoding, which is an industry 
standard. Proper decoding gives the direction its turned in one passing 
edge. That way I can dial in the size to .0001", better than the machine 
itself can do in most cases.

> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users



-- 
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[andy pugh]

On Thu, 25 Oct 2018 at 07:30, Tomaz T.  wrote:

> Do I need to look for "10 position rotary switch" or "Rotary encoder"?

That depends on whether you want a 10 position rotary switch or a
rotary encoder...

A 10 position switch will need 4 IO pins (you would need to get a BCD
coded switch rather than a 10-pin one)  whereas an encoder will need
2.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Tomaz T .]

>I cut too much. These are just examples, not recommendations.
>
>https://www.ebay.co.uk/itm/183476117151
>https://www.ebay.co.uk/itm/152204137441

I think in my case this kind of controls would be more suitable:

https://1drv.ms/u/s!AsTjVWm3v2FThmzyEF6CuxRtAAHF
[https://kwpsdg.by.files.1drv.com/y4mvNUYn0J1_Po5_E9pCsr5sdu_eqlnxvKoURXOFew01q1EJ6w3fv25bXu1Wy6unrI0VoZC0i_VkpoA4HIIZAyLTy4ZCB1ZvIWoGBu96YUBB954msM6a8Erin6UY-A58P1d]
 
[https://kwpsdg.by.files.1drv.com/y4mvNUYn0J1_Po5_E9pCsr5sdu_eqlnxvKoURXOFew01q1EJ6w3fv25bXu1Wy6unrI0VoZC0i_VkpoA4HIIZAyLTy4ZCB1ZvIWoGBu96YUBB954msM6a8Erin6UY-A58P1d]
Do I need to look for "10 position rotary switch" or "Rotary encoder"?

___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Tomaz T .]

>If your knobs are near the mill even without coolant you will probably need
>some sort seal to prevent the ingress of swarf.

In my case, I'm going to install it on electronics enclosure for mid-size 
router for milling wooden parts, so no water or moisture at 
all.

___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Gene Heskett]

On Wednesday 24 October 2018 17:05:42 Ken Strauss wrote:

> If your knobs are near the mill even without coolant you will probably
> need some sort seal to prevent the ingress of swarf.

Mine are on the lathes new apron, which is 1/2" alu. swarf would  have to 
fly in from the side at quite a high velocity, plus the terminals on the 
rear are quite well countersunk in that 1/2" of alu.  No hiccups yet in 
the year they've been there. Thats not to say it won't happen, 
eventually. Theres a Murphies Law corollary in there someplace. It will 
happen within 3 days of my using the spare I bought for something 
else. :)

> > -Original Message-
> > From: andy pugh [mailto:bodge...@gmail.com]
> > Sent: Wednesday, October 24, 2018 4:40 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] Feed/Rapid override physical knob selection
> >
> > On Wed, 24 Oct 2018 at 21:14, Tomaz T.  wrote:
> > > >There are two main choices, MPG (
> >
> > https://www.ebay.co.uk/183476117151)
> >
> > > >or potentiometer-style encoder (
> > > > https://www.ebay.co.uk/152204137441)
> > >
> > > Your links doesn't work, what do I need to look for to get right
> > > reaults?
> >
> > I cut too much. These are just examples, not recommendations.
> >
> > https://www.ebay.co.uk/itm/183476117151
> > https://www.ebay.co.uk/itm/152204137441
> >
> > --
> > atp
> > "A motorcycle is a bicycle with a pandemonium attachment and is
> > designed for the especial use of mechanical geniuses, daredevils and
> > lunatics."
> > - George Fitch, Atlanta Constitution Newspaper, 1916
> >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users



-- 
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Gene Heskett]

On Wednesday 24 October 2018 15:57:31 andy pugh wrote:

> On Wed, 24 Oct 2018 at 20:54, andy pugh  wrote:
> > Do you need waterproofing? That costs extra.
>
> I assume this one is waterproof when installed, but not inherently:
> https://www.ebay.co.uk/itm/253300957997

66$ is quite a premium for waterproof. OTOH, i'm not equipt for massive 
amounts of coolant either, so the 20$ mpja.com seems good enough for me.

-- 
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Ken Strauss]

If your knobs are near the mill even without coolant you will probably need 
some sort seal to prevent the ingress of swarf.

> -Original Message-
> From: andy pugh [mailto:bodge...@gmail.com]
> Sent: Wednesday, October 24, 2018 4:40 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Feed/Rapid override physical knob selection
>
> On Wed, 24 Oct 2018 at 21:14, Tomaz T.  wrote:
>
> > >There are two main choices, MPG (
> https://www.ebay.co.uk/183476117151)
> > >or potentiometer-style encoder ( https://www.ebay.co.uk/152204137441)
> >
> > Your links doesn't work, what do I need to look for to get right reaults?
>
> I cut too much. These are just examples, not recommendations.
>
> https://www.ebay.co.uk/itm/183476117151
> https://www.ebay.co.uk/itm/152204137441
>
> --
> atp
> "A motorcycle is a bicycle with a pandemonium attachment and is
> designed for the especial use of mechanical geniuses, daredevils and
> lunatics."
> - George Fitch, Atlanta Constitution Newspaper, 1916
>
>
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users




___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[andy pugh]

On Wed, 24 Oct 2018 at 21:14, Tomaz T.  wrote:

> >There are two main choices, MPG ( https://www.ebay.co.uk/183476117151)
> >or potentiometer-style encoder ( https://www.ebay.co.uk/152204137441)
>
> Your links doesn't work, what do I need to look for to get right reaults?

I cut too much. These are just examples, not recommendations.

https://www.ebay.co.uk/itm/183476117151
https://www.ebay.co.uk/itm/152204137441

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[Tomaz T .]

>Work out if you want 6 wire or 4 wire. (Does your Pico board support
>differential encoders? If it does you want the 6-wire)

I think it takes only 3-wire encoders (A,B,I)

>There are two main choices, MPG ( https://www.ebay.co.uk/183476117151)
>or potentiometer-style encoder ( https://www.ebay.co.uk/152204137441)

Your links doesn't work, what do I need to look for to get right reaults?

>Do you need waterproofing? That costs extra.

Only some dust might be present trugh time...


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[andy pugh]

On Wed, 24 Oct 2018 at 20:54, andy pugh  wrote:

> Do you need waterproofing? That costs extra.

I assume this one is waterproof when installed, but not inherently:
https://www.ebay.co.uk/itm/253300957997

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Feed/Rapid override physical knob selection

[andy pugh]

On Wed, 24 Oct 2018 at 18:00, Tomaz T.  wrote:

> I would like to add two physical knobs for adjusting Feed Override and Rapid 
> Override. Are there any caracteristics I should be aware of, befre ordering 
> cheapest one from ebay? Any suggestions?

I use the cheapest from eBay.

Work out if you want 6 wire or 4 wire. (Does your Pico board support
differential encoders? If it does you want the 6-wire)

There are two main choices, MPG ( https://www.ebay.co.uk/183476117151
) or potentiometer-style encoder ( https://www.ebay.co.uk/152204137441
)
Both will work, the smaller ones can be had with an additional
push-switch which could be used to cycle between spindle and feed (for
example)

Do you need waterproofing? That costs extra.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916


___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

[Emc-users] Feed/Rapid override physical knob selection

[Tomaz T .]

I would like to add two physical knobs for adjusting Feed Override and Rapid 
Override. Are there any caracteristics I should be aware of, befre ordering 
cheapest one from ebay? Any suggestions?


PS. I'm using Pico sytems controller board.




___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users