[anthow]

Hi all i have just purchased a second hand roland pnc 2700. now it has been modified and all the controls for it have been upgraded so it will run mac 3. the problem i have is that there are no controls for the spindle and me being new to this doesnt have a clue how to wire it or what i need to do this. all i know about the spindle its self is that it has 4 wires to it, red yellow blue and black, now i was under the impression that this meant it was 3phase but i am not convinced. please please can someone help me to wire this up or give me some advice on what to do next and where i might find more information.

thanks Anthony

[Al_The_Man]

You need to get the nature of the spindle technology in order to help, either name plate info or photo.
Al.

[anthow]

hi al thanks for your reply. there is no plate on the spindle but here are some pictures i hope this helps and maybe you can help me some more and i can finally get to the bottom of this.

cheers anthony
Attachment 201352

[Al_The_Man]

If all three wires have the same resistance between them then most likely AC induction motor?
Measure to make sure, check if one is connected to the motor frame?
Al,

[anthow]

Attachment 201358

[anthow]

the resistances between windings do not match each other they are as follows; black-blue=2.15, black-red=2.56, blue-red=4.18 and the yellow does not give a reading to any of them also none of them are connected to earth on body.

anthony