Mini wannabe datron build

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3 years 6 months ago #268485 by ihavenofish
Ok, new problem. motor wired up to Y. motor is on, working properly. Linuxcnc is commanding it on stepgen1, but I get no motion.

Hmmm.

The scope is showing nothing under test an tune either, so I expect if botched up some setting, but i don't see where.

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3 years 6 months ago #268488 by ihavenofish
Fixed, it was the step timing. All good now.

18000mm/m and 5.5m/s2.

That's as fast as i dare before bolting the thing down - desk wanted to go for a walk. :)

On the DDCSv3.1 control I restricted it down to 12000mm/m and 3m/s2 because it did not have very smooth motion. Linux is behaving much better so I think ill be able to put the rapids up to 20m/m (2000rpm) and put acceleration at the same 3m/s2. These servos are not high performance for tuning, although still miles ahead of what I got on the brother servos, haha.
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3 years 6 months ago #268590 by ihavenofish
OK, Last thing to do is spindle control.

I am reading that spindle control with the 7i96s under 2.8 is a bit weird? Would it just be easier to wipe out the machine and put 2.9 on?

Thoughts? :)

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3 years 6 months ago #268591 by ihavenofish
Hmm, seems 2.8.4 is supposed to be fine, What I read was out of date.
Ok, then, time to wire up and see what happens.

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3 years 6 months ago #268596 by ihavenofish
Woo, spindle runs. 36000rpm of goodness. haha. Some weirdness on the low speed end. I had locked out speeds below 6000rpm but the spindle will still turn on at 6000rpm. Linux is commanding the correct frequency, so i assume i need to adjust something in the vfd params. I may just remove the limited cause under cnc command ill never enter 5rpm. Also need a brake resistor, it takes like 10-15 secs to come to a stop from 36000rpm. So I will need to put in some healthy spindle dwell.

I am getting some weird messages that my maxvel is set too high, despite everything actually being set right and working right.

Anyhow, minor things to iron out. it is ready to run some air cutting programs though as soon as i bolt it to the wall tomorrow. yay.
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3 years 6 months ago #268636 by ihavenofish
Vroom

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