SWI Sport B3 with ProtoTRAK M3, Looking To Convert

More
15 Jun 2016 18:07 - 15 Jun 2016 18:34 #76116 by KroniK
KroniK created the topic: SWI Sport B3 with ProtoTRAK M3, Looking To Convert
Hello Everyone,

So I have an SWI Sport B3 mill with a ProtoTRAK M3 control system currently on it. I understand that it uses AC powered encoded servos for all 3 axis.

I would like to convert away from the ProtoTRAK because I have had to repair it once... and that was a very expensive nightmare. In my spare time I am a Linux Server Admin, so I figured I'd try switching to LinuxCNC since It has a great community and would provide me with a much more advanced control than what I currently have.

EDIT:

Ok so I was asking about how to drive the motors but I think I have found the current thread about these Proto Trak M3 systems here:
forum.linuxcnc.org/forum/38-general-linu...with-mesa-7i92-7i85s

Hopefully I can get to where they are and start asking questions from there. We will see how this all goes.
Last Edit: 15 Jun 2016 18:34 by KroniK.
More
16 Jun 2016 11:21 #76147 by andypugh
andypugh replied the topic: SWI Sport B3 with ProtoTRAK M3, Looking To Convert
That thread looks like a good starting point.
Let us know how it goes, and feel free to ask any questions.
More
19 Jun 2016 03:10 #76274 by jmelson
jmelson replied the topic: SWI Sport B3 with ProtoTRAK M3, Looking To Convert
You could also do this with the Pico Systems PWM servo system, assuming the encoders or motors provide commutation information ("Hall signals") for the motors.

We have a PWM controller and brushless PWM servo amplifiers.

Jon
More
20 Jun 2016 06:30 - 20 Jun 2016 06:32 #76299 by KroniK
KroniK replied the topic: SWI Sport B3 with ProtoTRAK M3, Looking To Convert
It was determined in this thread that the servos are ran by differential PWM in locked antiphase mode (50% = 0 drive). I'll let you be the judge if your drivers are able to drive such a servo.

I'm not sure about testing a different driver since another user has successfully been able to get a mesa driver to work, and replication is far easier than attempting to set something up from scratch.
Last Edit: 20 Jun 2016 06:32 by KroniK.
More
20 Jun 2016 16:28 #76322 by jmelson
jmelson replied the topic: SWI Sport B3 with ProtoTRAK M3, Looking To Convert

KroniK wrote: It was determined in this thread that the servos are ran by differential PWM in locked antiphase mode (50% = 0 drive). I'll let you be the judge if your drivers are able to drive such a servo.

I'm not sure about testing a different driver since another user has successfully been able to get a mesa driver to work, and replication is far easier than attempting to set something up from scratch.

OK, so you are planning to keep the existing drives? That's great if they are in good condition.
Yes, it is possible to use our controller to control such drives, you just add a 50% offset to the PWM command, and don't use the direction output.

The downside to synchronous antiphase is the motors and drives tend to run hot. That's why I set up my drives to
run in sign-magnitude mode, so that at rest there is no current output to the motor.

Jon
Moderators: piasdom
Time to create page: 0.296 seconds
Powered by Kunena Forum