Quote Originally Posted by Boyan Silyavski View Post
Ok. Now that io have you here :-) , i have another quick question . If BOB has transformer that powers limit switches and at the same time spindle speed output, and you connect a couple of limit switches in series and find that spindle speed output does not work right. Then could you add additional transformer positive and negative to the BOB outputs, same 12V vdc, but from another supply , so you kind of "help " it?????????

In theory you could, but it is not good practice and I wouldn't recommend going anywhere near that solution.

How about a diagram of what you are doing with some component info ?

There is probably another issue here. I would guess that your 12v power supply might be under-rated for the job, but having said that I don't know what load you are pulling. You could try adding a reservoir capacitor across the power line and also some decoupling capacitors near the prox switches, just in case you have switching transients going back on the power line.

If you are talking about another 12v supply, why not use it for the sensors only and leave your working spindle speed controller alone ?

Cheers,

Rob