Can you contol a servo thru the cheap breakout card?

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08 Sep 2019 12:03 #144515 by Leon82
Mitsubishi drive MR-J2S-10A and it's corresponding servo in step dir mode.

Or do you need something like a Mesa board at that point

Thanks

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08 Sep 2019 15:05 #144523 by PCW
You can drive a step/dir interfaced servo via a parallel port.

You may not reach the maximum speed or may need to lower
the steps/turn because the maximum step rate will be limited
by the host PCs base thread latency.
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11 Sep 2019 00:47 #144765 by andypugh
I saw a demo by a chap who was controlling Fanuc servo drives with a parallel port. He was using PWM and DIR into an AMC drive, and reading the 4-channel commutation with p-port IO and the bldc component.
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11 Sep 2019 00:59 #144767 by Leon82
Thanks,

I was looking for a harmonic reduction drive to make a rotary axis and came across one attached to this drive and servo. The size looks good, but the servo appears to be extremely small to hold it from cutting forces.

www.ebay.com/itm/LOT-HD-17-100-HARMONIC-...C-LINUX/273961407720.

There are some other worm gear reduction parts also that may work. I'll have to look into,

www.ebay.com/itm/100-1-Worm-Gearbox-Spee...r-Motor/112994798022

www.ebay.com/itm/Sherline-8730-CNC-Mill-...r-Motor/183849293013

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11 Sep 2019 01:23 #144769 by andypugh
How about www.ebay.com/itm/292069165260

These have a big and strong crossed-roller bearing on the output side, so make a perfect 4th axis.

bodgesoc.blogspot.com/2017/05/harmonic.html

The 25-B is much easier to interface with a generic servo drive than the 25-C version.
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11 Sep 2019 01:27 #144770 by andypugh
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11 Sep 2019 01:28 #144771 by Leon82

How about www.ebay.com/itm/292069165260

These have a big and strong crossed-roller bearing on the output side, so make a perfect 4th axis.

bodgesoc.blogspot.com/2017/05/harmonic.html

The 25-B is much easier to interface with a generic servo drive than the 25-C version.


Cool, thanks

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11 Sep 2019 06:13 #144784 by pl7i92
@ leon
what are you planing on the 4th
it may take you down to a 100:1 4Nm in Standard stepper
or as they are realy cheep now go fora 12Nm and put a timingbeld 3:1 4bearing Spindle adapter against
this brings you up to 50Nm at very low cost
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11 Sep 2019 09:05 #144796 by Leon82

@ leon
what are you planing on the 4th
it may take you down to a 100:1 4Nm in Standard stepper
or as they are realy cheep now go fora 12Nm and put a timingbeld 3:1 4bearing Spindle adapter against
this brings you up to 50Nm at very low cost


Probably indexing , not very heavy stuff. Maybe some 4 axis stuff at some point.

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11 Sep 2019 13:57 #144821 by pl7i92
then get you a >30:1 precice gear planatary on Ebay
i use only wormgear backlash free from Maedler
or as not the big load simply timingbelt 3:1 as i mentiond above give it a shot

IF YOU can spend the money or are willing for a harmonic drive go for it
nothing better then this
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