Mazak Micro Slant 15 Retrofit

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3 years 10 months ago #259020 by tommylight
By manually, i do mean holding the enable wire by hand touching the ground! :)
I have a stinking sensation LinuxCNC is much faster at turning those off, i need to touch the wire, hear the motor screaming, remove the wire, in my youth i would think about 0.5 seconds, now probably a lot longer!
I was not sure those are the enable wires, now i know.
More fun tonight, hopefully, spent half day chasing and removing cables from the big plasma i am working on, lost about 2Kg jumping up and down the machine.

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3 years 10 months ago #259057 by smc.collins
what are the make and model of the drives ? I might be able to get the manuals for ya.

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3 years 10 months ago #259059 by tommylight
Mitsubishi TRA 30
I already have them powered and working to a certain point, one of them that is, the Z axis.
Still not sure what the switch with P 0 V does, but when on P it does react to inputs and changes direction, on the other 2 positions it just runs on one direction no matter the input.
Just got back from having a go at tuning it, it did not go well! I got the drive to work and react to commands, but seems the encoders i installed are not feeling OK, the scope trace looks anything but OK on the A and B sides. Will drag the real scope near the machine tomorrow and have another go.
Since it is related, i have 5 of those encoders, bought about 4 years back, never could use them as they are very finicky, even a 0.1mm miss alignment will render them useless and cause differences in pulse speed between the lines. So if the signals do mismatch tomorrow, i am throwing all 5 of them and getting new ones, with proper mounting stuff, not on 3D printed mounts! :)
Oh, almost forgot:
IT'S ALIVEEEEEEE

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3 years 10 months ago #259061 by tommylight
BTW, i do have the maintenance manual, it did help a bit with wiring, but does not help with
P 0 V
or
P O V
still, i have no idea what and how would that be position loop for a drive that has no feedback except tacho going to it, but probably has response and other stuff tuned for position mode use.
That is what the manual seems to say and loosely confirmed today.
I need time .... 3:22AM here.

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3 years 10 months ago - 3 years 10 months ago #259063 by smc.collins
I've got a friend at Melco USA in automation alley. I'll see if i can find anything for ya

this is what he sent back, he said it's a fairly similar drive, but that those OEM drive didn't always get properly documented. 

 
Last edit: 3 years 10 months ago by smc.collins.
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3 years 10 months ago #259219 by tommylight
Turns out P stands for Power mode???
I did manage to get something useful with velocity tuning, but far from good and with quite violent start/stops, so as i was testing i noticed adding I and D helps a lot, so reset everything and found a post here on the forum for torque mode with single loop tuning by PCW ( i am sure Andy also mentioned the same technique here) and low and behold it works perfectly! :)
Thank you all.
Now i need some better cable for the encoders to replace the puny one i used for testing, and test homing, i could not due to a short cable.
Since i already have everything else working, i would ... have to do some videos, cr@p, i always forget that.
Also did tune the big Messer plasma machine today, again no videos...
I'll go hide under a big rock...

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