PAC Sci pc834 and PMA44R motor

[JohnZ]

I have been watching a pacific scientific motor and controller on eBay, both sold by the same seller. The controller is a Pacific Scientific PC834, the motor is a PMA44R. The seller has around 15 each of the controllers and motors, and the motors include the cables for motor power and feedback which is a very nice bonus.

I have found PDF documents for the PC830 users manual, high performance servo motors and one on the PC800 series controllers. With all of this information, I cannot figure out if this controller / motor combination will work together. I had a conversation with the seller, and was told that the controller was an AC servo controller while the motor was a DC motor and that they would NOT go together. But that does not make sense from the research I have done so far.

According to the Pacific Scientific "High performance servo motors" document, the PC8x4 controller is the recommended controller for the PMA44 series motors with the N, P, and Q windings, but recommend the SC9x4 controller for the "R" windings in the motor. The documents list the windings electrical specifications, and other than the current for continuous rated torque, this motor appears to be within the specifications of the controller, especially since the controller has the forced air fan option installed which raises the continuous current rating above the continuous current spec of the motor.

So I reach out to the experts here at cnc zone. This motor will be used to power a high precision spindle made by colonial tool (rated for a much more powerful motor than this one) which is going on a bridge mill I am building. I plan on a two speed belt drive with a 2:1 plus a 1:3 or 1:4 ratio to select between high speed or torque at low speed. I also plan on being able to mount it on the mill table with a turret on the z axis similar to a slant bed lathe. (crazy idea, I know, but what the heck, might as well try it)

My main question is this ... Will this motor work with this controller? I only have 240v single phase, so would need to de-rate the controller to 2kw, and the max rpm of the motor to 85% if I understand the documents correctly. But can I run this PC834 controller on 240v single phase (there is conflicting info in the users guide) and have it drive this motor?

Another question I have is if this can be programmed to be controlled by both step / direction inputs and the analog 10v input for velocity with perhaps setting an I/O port to select the mode. This could be a manual switch, since one mode would be used when setup as a 4th axis and the other mode when used as a spindle or lathe headstock.

Finally, I believe that there is a member here who sells the PAC SCI equipment and can provide the PC830 software used to program this controller. If I go with this combination, I would need to purchase or get this software - hopefully it is not too expensive.

Thank you very much in advance everyone for your assistance and guidance. - John Z

[mike_Kilroy]

I have been watching a pacific scientific motor and controller on eBay, both sold by the same seller. The controller is a Pacific Scientific PC834, the motor is a PMA44R.......

I cannot figure out if this controller / motor combination will work together. I had a conversation with the seller, and was told that the controller was an AC servo controller while the motor was a DC motor and that they would NOT go together......

My main question is this ... Will this motor work with this controller? I only have 240v single phase, so would need to de-rate the controller to 2kw, and the max rpm of the motor to 85% if I understand the documents correctly. But can I run this PC834 controller on 240v single phase (there is conflicting info in the users guide) and have it drive this motor?

Another question I have is if this can be programmed to be controlled by both step / direction inputs and the analog 10v input for velocity with perhaps setting an I/O port to select the mode. This could be a manual switch, since one mode would be used when setup as a 4th axis and the other mode when used as a spindle or lathe headstock.

Finally, I believe that there is a member here who sells the PAC SCI equipment and can provide the PC830 software used to program this controller. If I go with this combination, I would need to purchase or get this software - hopefully it is not too expensive.

Thank you very much in advance everyone for your assistance and guidance. - John Z

Mr. John, yes this is a good combination; the seller was wrong to call the motor "DC."

I can send you the software if you can afford my price. Send me an email address to send to; preferably email it to me.... mike -at- KilroyWasHere -dot- com.

We have too many motors and drive models to remember them all but I did not think there was a derate for 1ph on this one, and there surely is not a derate of speed as the PMA was a 230v designed motor anyway (again IIRC).

If it has step/dir AND analog input (again, too many old models to remember all) then yes you should be able to change from one to the other but it most likely is a software parameter so not readily changable with an input...

oh ya, my price for the software: $ 0

[JohnZ]

Message sent. Thank you very much for the prompt reply. -John Z

[mike_Kilroy]

but u did not send me an email address to send software to?

[JohnZ]

Oops, I sent that to your email address and found that I typo'd your domain name.

I just sent a second message using the CNCZone PM system.

I was just looking at the "Bargains" link on your site and see that you have some Regen Resisters listed as well as a bunch of motors / controllers. I would like to open a dialog about what motor / controllers you have available which would be a matched set in the 2+KW and 2500+ max rated speed to see if I can get a better deal that what I asked about above.

Thanks - John Z

[mike_Kilroy]

u rcv my email with software?

[JohnZ]

Yes, I received one email with a 5.2 meg zip attachment. I was able to open the zip file and see a few files / folders including a setup.exe file. I will have to try installing that when I get back home. I really appreciate your assistance. - John Z

[mike_Kilroy]

ok I looked around and found a Pac Sci demo unit: SC902 with OC950 option, 3"dia resolver based motor with nice pointer knob on it, 120v cord. OC950 is complete motion controller that programs in basic like language IIRC.... Also little sw box for i/o, speed pot etc for it to demo. Any value to you? Want to pm me with an offer?