[TiggerKZN]

Hi all.
Any advise would be greatly appreciated.
I'm running Mitsubishi servos and amplifiers, and a Mach3 controller
I'm really needing help with which wires to connect to the controller. (Pulse and direction)
I chatted to their support team who say it can be done, but couldn't offer to much in the way of how.

This is the last big obstacle stopping me from getting this thing running and I'm running out of hair...

I've attached the pinouts of the CN1 port of the amplifier below.

If anyone can help i would be most grateful

Regards
Clinton

[joeavaerage]

Hi,
looking at the pinout I would guess the pulse Ste/Dir inputs are differential. You need to confirm voltage level. Single ended digital inputs tend to be 12V or 24V but differential inputs tend to be 5V.
You need to be bloody sure you are applying the correct voltage pulses or risk damaging the input optocouplers.

PP and PG are a pair and NP and NG are a pair.

Look (in the manual) for a representative circuit diagram of the inputs circuits, there will almost certainly be current limit resistors and that sort of thing. Those details are critical to understand if you wish to use
these drives properly. Failure to understand will result in you blowing one or more optocouplers and essentially wrecking the drive.

Craig

[TiggerKZN]

Craig, thanks very much for your reply. I'll check voltages later this morning. If you keen to, hang around I'll post the results here. Your insights are appreciated.

[TiggerKZN]

Ok. So far I can't find any voltage on PG/NG PP/NP. I've figured out the Estop circuit and the alarm circuit. It's the last 4 encoder wires that have me stumped. Although there are 26 pins on the CN1 connector only 8 are being used.

[joeavaerage]

Hi,
Its not so much that PG/NG PP and NP have voltage on them but rather they will have a voltage tolerance. If they are differential, as I suspect, then they will be 5V tolerant, and therfore if
you come along and blithely apply 24V single ended then you wreck it.

The attached pics are from the manual of my Delta B2 servos. They are to assist and inform you about interfacing to the drive. There is one page for single ened configuration (also called open collector) and
another page for differential. Note that differential is both faster and has greater noise immunity and is generally prefered and how the manufacturer intended their drive to be used.

Surely there must be diagrams of this type in your manual. These are the details that you need to make an informed choice about how to signal the drives.

It's the last 4 encoder wires that have me stumped. Although there are 26 pins on the CN1 connector only 8 are being used.

What control system are you using?. If its an open-loop Step/Direction controller then the encoder outputs of the drive are not required for the controller. You could use them for a DRO or something, but they
are not required by a Step/Direction controller.

My Delta servo drives have a 42 pin socket for control signals. I have two wires each for Step and Direction, an Enable, a Reset and an Alarm wire and one wire as a 0V common return, ie 8 wires. They work fine.
Just because there are lots of pins in the socket does not necessarily mean you need all of them to get the servo to run.

Craig