Fingers crossed it'll cut ally

[blackburn mark]

I'm looking at the servo controller now. I've traced the PCB and drawn circuit diagram of the interesting bits. The problem is the one you sent me has one significant difference to yours - mine gets 3.3v for the microcontroller and potentiometer via a 3.3v voltage regulator. I think yours is either a 5v microcontroller, or they're getting 3.3v via a voltage divider....

Could you measure the maximum voltage from between R32 and ground on the PCB please? I may have asked you to do that already, this thread is so long I'm not sure!
Also what resistance is your potentiometer - it says on the metal case (FB5k ... i.e 5k ohms for mine)?

Edit: don't worry about the voltage, post #90! Except was that definitely the voltage from the resistor to ground, not across the resistor?

ill try to get another the same as yours
this thread is getting a bit long i guess i should have split it up into spindles router and vacuum stuff

[Jonathan]

ill try to get another the same as yours
this thread is getting a bit long i guess i should have split it up into spindles router and vacuum stuff

Wait a second. I can just make you one using a PIC ... it'll save you buying one and you won't have to modify it.

If you just measure the voltage at the point I said earlier. Remove that resistor (R32), remove R31 and connect the parallel port pin to where R31 connected to the potentiometer, then set spindle in mach3 to highest, adjust the pot so you get the same voltage as measured at R32 earlier. Put R32 back in place and do not move the potentiometer ever again otherwise the microcontroller will probably break.

Measure that voltage, if it's ok then I'll scribble a diagram over the picture you posted.

It would be good if a moderator could split this thread up to save duplication? If not then I'll start a new one about the spindles.

[blackburn mark]

Wait a second. I can just make you one using a PIC ... it'll save you buying one and you won't have to modify it.

If you just measure the voltage at the point I said earlier. Remove that resistor (R32), remove R31 and connect the parallel port pin to where R31 connected to the potentiometer, then set spindle in mach3 to highest, adjust the pot so you get the same voltage as measured at R32 earlier. Put R32 back in place and do not move the potentiometer ever again otherwise the microcontroller will probably break.

Measure that voltage, if it's ok then I'll scribble a diagram over the picture you posted.

It would be good if a moderator could split this thread up to save duplication? If not then I'll start a new one about the spindles.

great stuff, ill get on it as soon as i have time :)
ill probably buy another servo controller so i can run the spindles without mach and for a backup in case i fry the one iv got