Hybrid servo drives not working. Help please (Resolved)

[b_laauwen]

Hi all. I purchased a pair of closed loop steppers and drives off ebay. Documentation is zip. I can't even work out what drive setup to use in acorn. Has anyone come across these ones before . I looked online for the driver code and all i get is sale advets for them.

[Dave_C]

Ok, to get started, don't mess with any of the dip switches. leave them as is for now.

Next, wire the step and direction pins, skip the Alarm and enable for now as well.

You will need a 25 pin breakout connector to wire the step and direction to the 25 pin header. Do not try to connect these on the normal terminals as there is a control voltage difference. One is 24 vdc and the 25 pin header is 5 vdc. You need 5 vdc for these motors.

The next step is to wire the PA and PB points plus the 5vdc and the grnd. These are your encoder feedback terminals. You have the color codes of the wires on your sheet shown in the picture.

Next, wire your servo power (DC up to 70 volts) to the lower terminals.

Do all of this as a bench test per the Acorn instructions and it should work. After you get the motors to turn, take a look at the dip switches and see if they are set to 2,000 steps per rev. That is the normal steps per rev for these motors.

Dave C.

[martyscncgarage]

Disconnect that enable for now....When you power up the motor and drive is the motor rotor locked? You can't turn the motor shaft?

Dave C is giving you some good advice too. Consider using the DB25 connector. You can get DB25 Male breakout boards from Amazon.

This video may help you if you want to try and get it going on the Acorn header terminals.
(DO NOT CHANGE THE DIP SWITCHES as Dave mentions)

[b_laauwen]

Thank you both Dave and Marty. I got the motors working. I have a mill aready that was originally with standard steppers then upgraded to clearpath servos. Didn't have anywhere near the headaches with those.

[martyscncgarage]

Thank you both Dave and Marty. I got the motors working. I have a mill aready that was originally with standard steppers then upgraded to clearpath servos. Didn't have anywhere near the headaches with those.

You gave up too soon.
Most times people hook up the ENABLE and when Acorn Enables the drives, it actually disables them.
Going into the ADVANCED tab and either checking or unchecking the Enables usually solves the problem

Telltale sign is after trying to jog the motors, the motor rotors are unlocked and you can rotate them by hand. Telling you the drives are disabled.
Most of the drives come from the factory ENABLED by default.

Marty