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Steppers stuttering

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24 May 2022 14:30 #243690 by tommylight
Replied by tommylight on topic Steppers stuttering
And?
Does it work smooth in Auto mode ?
Never rely on testing the machine while manual jogging, keyboards can and will introduce stuttering .

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24 May 2022 15:30 #243698 by remon_v
Replied by remon_v on topic Steppers stuttering
Hey Tommy,

I just ran another program… but I’m not satisfied yet. It still stutters. Maybe it’s not LinuxCNC’s fault, maybe it’s something with the wiring or so. I’m using GX16 connectors to connect to my control cabinet and it was about my first time soldering…

I don’t know….

On the cnczone forum someone said the auto tune on the drivers has only got to do with current. That helped yesterday, but today it seems worse from where I ended last night.

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24 May 2022 18:08 #243713 by remon_v
Replied by remon_v on topic Steppers stuttering
uuuh please don't laugh... but I fix the problem, it was the belt tention
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24 May 2022 19:26 #243718 by tommylight
Replied by tommylight on topic Steppers stuttering
Not laughing.... :)
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24 May 2022 19:45 #243719 by Todd Zuercher
Replied by Todd Zuercher on topic Steppers stuttering
It can be a frustrating experience trouble shooting something like this. But it still feels good to have the problem fixed even if the solution seems embarrassingly simple.
The following user(s) said Thank You: tommylight, Clive S, remon_v

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24 May 2022 21:51 #243722 by remon_v
Replied by remon_v on topic Steppers stuttering
Yes it does feel good! And I learned a lot…

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10 Jul 2022 10:20 #247001 by JackRay
Replied by JackRay on topic Steppers stuttering
Hello to all,
I have just acquired a GIGABIT motherboard with a PENTIUM 100 2.8G processor, 4GBRam to run the CNC 5axes TCP. But despite the many readings of the forum that I could do: change BASE PERIOD, SERVO_PERIOD, setp parport.0.reset-time 5000, impossible to make my machine work properly, it stutters.

On my other configuration ASUS motherboard + SAMPRON 2.0 Go, 2Go of RAM the operation is perfectly fulide .

Could you please direct me to test parameter changes or more compatible hardware to drive this machine.

Thank you for your help

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10 Jul 2022 10:47 #247005 by tommylight
Replied by tommylight on topic Steppers stuttering
Does it sttuter only when jogging or when running gcode ?
Do you get latency warnings?
Did you measure the power supply voltage while motors are moving?
First thing, try a different keyboard.
And do not change the servo period, set it back to 1000000 ( 1 million), that messes everything if set to other values.
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10 Jul 2022 15:15 #247018 by JackRay
Replied by JackRay on topic Steppers stuttering
Does it sttuter only when jogging or when running gcode ?
I could only try it during jogging. When I use a salt axis it goes very well "without jogging" but I move the 5 axes at the same time, there is much jogging. I have to stop the machine.

Do you get latency warnings? 888000
Did you measure the power supply voltage while motors are moving? No

First thing, try a different keyboard. I have a USB keyboard
And do not change the servo period, set it back to 1000000 ( 1 million), that messes everything if set to other values. I had put 100000 because my first configuration works very well with this value

Thank you

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10 Jul 2022 17:40 #247030 by tommylight
Replied by tommylight on topic Steppers stuttering
What does 888000 mean?
It does not matter if the keyboard is USB or PS/2, some have issues with "typematic rate" or rate of repeating when a button is held pressed. Try another one, or try this :
forum.linuxcnc.org/38-general-linuxcnc-q...elocity-fluctuations
Servo period must be 1 million, base period can be as low as you can set it without getting latency errors, so 100000 is OK for base period.

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