Wiring a Chinese servo to a 7i77. Setup for yet another newbie

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7 years 1 week ago #148393 by SPH
I sorted it out. Nothing too complicated as usual, in hindsight.
The drive needs external +24v power for it's inputs, DC+ on pin 9 and DC- switched on pin 6 for enable.
External 24v+ to TB5 pin 2, 24v+ switched from TB5 pin 1 to pin 6 on the drive. 24- to pin 6 on the drive.
Enable now works and soft estop also works as expected. I'll get a hard estop working next.

There's about 1/8 of a shaft rotation just as the drive enables. Perhaps something to do with the fairly high rpm drift when the loop isn't closed? Should I be chasing drive parameters to tone this down or is it something in software? I imagine it'll make for a pretty good mechanical 'clunk' when everything connected for real.

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7 years 1 week ago #148528 by SPH
I've got the X and Z axis' wired and running. Jogging is acceptable.
I take it the tuning will be influenced by the actual mechanics of the machine so I shouldn't get too far into the tuning until the servos are actually mounted?

I'll also have the fun job of re-wiring my encoder and motor plugs as I somewhat foolishly decided to use the existing motor cables from the Yaskawas to save a buck. Should'a just spend the buck. The motor cables are easy of course, just the 4 wires. It's the 15 pin encoder cables I'm not too keen on.

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6 years 11 months ago #149962 by kavindu1
i read your drive pdf your drive cn2 cabale out the A , B and Z plus out puts.
are u wire tease plus output to 7i77?

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6 years 11 months ago #149964 by SPH
Not quite sure what you mean. Yes I have the A B and Z outputs wires into the 7i77.

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5 years 1 month ago #219482 by James Yother
I'm trying to hook up the encoder to the acorn and what I don't know is where to hook the 5+VDC from the acorn encoder plug into the servo driver. what I do know is that on page 2.3.2 of the manual A+ is pin 20 A- is pin 19 B+ is pin 19 B- is pin 17 Z+ is pin 15 Z- is pin 16 GND is pin 1 and the only remaining pin is pin 22 and that is called OZ (Z open collector output) so I would thing that since that pin 22 is the only remaining pin; that it must be the 5+VDC for the encoder?????? oh man its always the last bolt you un-tighten that breaks off LOL on the acorn encoder plug it has pin 9=+5VDC pin7=A+ pin 8=B+ pin5=B- pin 6=Z+ pin 3=Z- pin 2=COM so it seems all so clear that A+ A- B+ B- Z+ Z- GND (COM) all have their places to connect to, but it's that 5+VDC pin 9 on the acorn that I dont know where to plug it in on the db25 connector on the servo driver, do you know if it plugs into the pin 22 OZ (Z open collector) please help, I am going crazy LOL
 

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5 years 1 month ago #219483 by PCW
The 5V is to power a standalone encoder.

If the servo has a simulated encoder output it does not need
5V so the 5V pin on the Acorn would be left unconnected

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