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Author Topic: Is This A Bug In Mach3 ver 2.60  (Read 9051 times)

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Re: Is This A Bug In Mach3 ver 2.60
« Reply #10 on: November 26, 2007, 08:22:13 AM »
Hi N4NV

I am using a C11 from cnc4pc

It is an opto isolated board also my drivers are opto isolated  :'(

That is the problem, i am getting some sort of accumulated error.

So how do i fix it please.

Phil_H
The Good Thing About Mach3, Is It's very Configurable

The Bad Thing About Mach3, Is It's Too Configurable

Offline ART

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Re: Is This A Bug In Mach3 ver 2.60
« Reply #11 on: November 26, 2007, 08:32:41 AM »
Hi:

 Its possible you have a direction prechange thats too low, did you try making the Direction wdth to 10 on the motor tuning screen? Some drivers need a delay that is a bit wide when changing directions.. Id try a few values, ( same test proceedure) and see if it varys the amount lost , or even corrects it..)

Art
Re: Is This A Bug In Mach3 ver 2.60
« Reply #12 on: November 26, 2007, 08:48:07 AM »
Hi Art thanks for your help

I have them both set at 5 is there an upper limit ?

Tried them up to the limits 25 and 15.

The error has now gone from 0.255mm to 0.21mm but they are not losing but gaining ?

My test is from Zero to -60 after the 50 cycles Zero on my DTI is -.210mm now

Phil_H
« Last Edit: November 26, 2007, 09:42:12 AM by Phil_H »
The Good Thing About Mach3, Is It's very Configurable

The Bad Thing About Mach3, Is It's Too Configurable
Re: Is This A Bug In Mach3 ver 2.60
« Reply #13 on: November 26, 2007, 09:38:04 AM »
Phil,

You  said :-

"It is an opto isolated board also my drivers are opto isolated"

Apparently this can cause problems but not always. It would be worth connecting your step and direction signals from the input of your BOB to your drivers,just to eliminate this as possible problem.

Ian
Re: Is This A Bug In Mach3 ver 2.60
« Reply #14 on: November 26, 2007, 10:44:38 AM »
Could you please make a simple prgram to test with that has not Subs ? Please make a file that has a simple Z+ Z- and tell me if you have the same problem.

As a test have you tried the sherline mode under ports and pins?

Thanks
Brian
Fixing problems one post at a time ;)

www.newfangledsolutions.com
www.machsupport.com
Re: Is This A Bug In Mach3 ver 2.60
« Reply #15 on: November 26, 2007, 10:53:03 AM »
1) What motors are you using?
2) What is the native step resolution of the motors (steps per rev)?
3) What microstepping are you using on you controller?
Re: Is This A Bug In Mach3 ver 2.60
« Reply #16 on: November 26, 2007, 12:38:17 PM »
Phil,

Have you made sure you have taken precautions to put noise under control?  Some earlier versions of the C11 board you are using could be affected by noise and cause that problem.  What is the revision number on the board?

Thanks,

Arturo Duncan
http://cnc4pc.com
Re: Is This A Bug In Mach3 ver 2.60
« Reply #17 on: November 26, 2007, 01:10:22 PM »
Hi Brian

I run code as you said the result was an error of -0.2275 "From a consistent-.0.2555mm"

Then ran same code in Sherline mode now error is -0.2625mm

Hi Andrey

The motors are Astrosyn MY259RE

Y axis 400 steps per rev

Using 10 micro steps

Hi Arturo

All my wiring is tidy, signal wires are not close to power wires

The results are very consistent surely with noise i would be getting Inconsistent results.

The board revision is 3.1 if i remember correctly

How could i test for noise

Phil_H
The Good Thing About Mach3, Is It's very Configurable

The Bad Thing About Mach3, Is It's Too Configurable
Re: Is This A Bug In Mach3 ver 2.60
« Reply #18 on: November 26, 2007, 01:20:13 PM »
Phil,

I would like to send a new Breakout Board so we can rule this out.  Please send a me a message with information of your inital order so I can locate it.

Thanks,

Arturo Duncan
Re: Is This A Bug In Mach3 ver 2.60
« Reply #19 on: November 26, 2007, 01:35:32 PM »
Hi Arturo.

Thanks for the kind offer, it seems my email is playing up, i can receive but not send at the moment.

So will try later.

Phil_H
The Good Thing About Mach3, Is It's very Configurable

The Bad Thing About Mach3, Is It's Too Configurable