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X-carve linux cnc upgrade tuning

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10 years 5 months ago - 10 years 5 months ago #74627 by PCW
1. Your X and Y acceleration are likely way too quick (you have 200 IPS^2 which is greater than 1/2G)
this means you get to full speed in about 1/250 of a second! Thats starting off with a bang!
I would start initial acceleration at no more than 10 times the maximum velocity

2. Your base thread is quite slow (16 KHz or so) this is liable to make step generation a bit crunchy
I would see if you can improve your PCs latency so you can raise the base thread rate
Last edit: 10 years 5 months ago by PCW.

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10 years 5 months ago #74632 by mrbishop
i'm basing my base jitter around the maximum wich is about 50k. this is the best PC i have to throw at this thing at the moment. but if there are things i can do to help reduce my lag i'd love to hear them :)

thanks in advance.

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10 years 5 months ago #74636 by geoffs
Based on your configuration and the advice here, I need to do a LOT of tuning on my X-Carve :)

(Gecko G540)

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10 years 5 months ago #74638 by mrbishop
more info.
steppers are set for 1/8 th inch 3 amps

i'm learning alot about how all this stuff works the more i dig into this project.

the sooner i get this dialed in the happier i'll be and i can get back to business :)


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10 years 5 months ago #74639 by Rick G
You might start here...
forum.linuxcnc.org/forum/18-computer
The first few post should help a lot with latency.

And as posted above dramatically reduce your acceleration.

Rick G

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10 years 5 months ago #74658 by mrbishop
Replaced the nvidia you with an ati one and I'm under 50k max latency. Going to try to dedicate a core or 2 . Well I'm going to try anyway.

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