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« on: June 10, 2023, 02:03:06 PM »
I am continuing to check things out and examining the wiring. Seems that the Drive Enable for this machine is to pull in the individual drive relays which makes the connection between the motor and the drive amp. Old transistor devices will allow that, the newer stuff with MOSFET and IGBT ouput stages would not tolerate that. I think my drives are not enabling because of the problems inside the computer section of the machine. been working on pulling the motors off so I can set them on the table for testing and not having to worry about what might run into an end stop.
Checking on the encoders - they are 250 counts per revolution, which because of the 2:1 ratio between the motor an the ball screw means I have, in a practical sense, 500 counts per revolution. As the ball screws on this machine are all 5mm pitch I am coming in at just about a thou per count.will work to start, but a 1000 count encoder seems like a better minimum count for this machine.
I have ordered some replacement capacitors for the DPS (Drive Power Supply) board. All the large electrolitic filter caps had blown at some point in the past. The power supply still seems to function ok, but the servos might behave better with cleaner DC power.