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Author Topic: Cannot tune motor, Motor screen will not allow entering data  (Read 336 times)

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Cannot tune motor, Motor screen will not allow entering data
« on: April 09, 2019, 09:43:08 PM »
Hi I am new to mach4.  I just got my motors running and went to tune the motors as told on the manual.

I cannot enter values into the boxes, they are greyed out.  Any hints on what I should do?
Re: Cannot tune motor, Motor screen will not allow entering data
« Reply #1 on: April 09, 2019, 09:48:27 PM »
You must click on one of the Motors in the column at the right
to highlight the selected motor before the boxes can be edited.
Steve Stallings
www.PMDX.com
For PMDX product support, please use PMDX forum or direct email for quickest response. We do not use this forum as our primary product support site.
Re: Cannot tune motor, Motor screen will not allow entering data
« Reply #2 on: April 09, 2019, 09:49:37 PM »
Yes I have done that I select motor 0, which is the one I want to tune
Re: Cannot tune motor, Motor screen will not allow entering data
« Reply #3 on: April 09, 2019, 09:52:00 PM »
Ahh ok, I thought the check mark was good enough I get it now tyvm

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Re: Cannot tune motor, Motor screen will not allow entering data
« Reply #4 on: April 09, 2019, 10:04:10 PM »
Hi I am new to mach4.  I just got my motors running and went to tune the motors as told on the manual.

I cannot enter values into the boxes, they are greyed out.  Any hints on what I should do?
Which brand and model of Motion Controller are you using?
The correct setup of the plugin of the motion controller must have been done and link mapped correctly before MACH4 can tune motors.
"the gift of God is eternal life through Jesus Christ our Lord"
Re: Cannot tune motor, Motor screen will not allow entering data
« Reply #5 on: April 09, 2019, 11:10:37 PM »
I am using a PoKeys57CNC with Mach4 plugins. 
I am in the process of first set-up. The stepper is stuttering badly. 
I am trying to diagnose the problem. 
I got tuning to work.  I have yet to determine the best settings.  Right now even at 60 rpm the motor stutters.
Re: Cannot tune motor, Motor screen will not allow entering data
« Reply #6 on: April 09, 2019, 11:28:08 PM »
Hi,
there was a post a while back where a guy had problems with a 57CNC. It gave the symptoms of having insufficient
kernel speed despite apparently being within spec. If memory serves he ended up getting an ESS which has a max pulse
rate of 4MHz, compared to about 100-125kHz for the 57CNC.

What microstepping regime are you using?.

I would suggest that anything over 8 microsteps per full step (1600 pulse/rev) is unwarranted. Higher regimes offer no
more resolution, I now that sounds contrary to common sense, and I will explain if you absolutely require, but trust me
you get no higher resolution beyond 1/2 step. While higher regimes may offer somewhat more smoothness a regime
of 8 microsteps already offers a good improvement in that regard.

The principle problem with higher microstepping regimes is that for a given rotational speed the number of pulses required to
do one revolution goes up. Therefore your controller CPU/FPGA/DSP has to work that much faster. From what you have described
I think you may be trying to push the 57CNC at or close to its limits which may describe the stuttering.

Craig
My wife left with my best friend...
     and I miss him!
Re: Cannot tune motor, Motor screen will not allow entering data
« Reply #7 on: April 10, 2019, 07:28:46 AM »
Hi Craig
I Have tried 400 - 6400 microsteps all produce the same stuttering.  I have reset to 800.
I have adjusted max speed from 50 to 250 rev/min - same stutter
I have adjusted max acceleration from 2 to 10 rev/sec2 - same stutter

I am going to try a different computer now

Note:
PoKeys57CNC outputs 5V with max 8 mA on the logic circuits
The Leadshine Stepper drivers need 7 mA min with 10 mA typical

I suspect I need to amplify the logic leads out of the leadshine, I just forget how to do this lol
« Last Edit: April 10, 2019, 07:32:03 AM by irakandjii »
Re: Cannot tune motor, Motor screen will not allow entering data
« Reply #8 on: April 10, 2019, 07:37:37 AM »
Hi,
well you've certainly experimented enough. I'm thinking like you that maybe the PC is stuttering.

I use an ESS and Warp9 definitely recommend that WIFI and any other Ethernet adapter be disabled on
the PC that runs Mach. It might be worth checking that you have no competing comms going on.

Craig
My wife left with my best friend...
     and I miss him!
Re: Cannot tune motor, Motor screen will not allow entering data
« Reply #9 on: April 10, 2019, 12:05:35 PM »
Success!!!

The stuttering was caused by the USB 3.1-USB 2.0 interface between the PoKeys57CNC and the computers.

I converted to ethernet and all stuttering is now gone, on to the next phase!

Thanks to all that helped!!