Sprint 400 driver board

[dazp1976]

Thanks for devoting your morning to this!

I'm still stuck.

Giving the Sprint Board 100V AC and switched the jumper to 110V
On the F- and F+ pins I get 90V DC
On the A- and A+ I get about 3V
The reference voltage of 10V is there on pin 1
But putting this 10V on the input pin (pin 3) makes no difference to either output
I have the Run pin 5 connected to COM

This is how it looks to me.
The circuit on pins 1,2,3 are basically a diagram of a 10k 3pin manual potentiometer.
P1= 10v into pot (to power pot)
P2= 0v from pot (vmin)
P3= the pot wiper (0-10v variation)

This tells me that if you have control board with it's own 0-10v & GND outputs for spindle control.... You would omit the 10v pin1 and put the GND on pin 2 and the 0-10v on pin3.

Next is P4 & P5. This looks to be to switch it on. Power comes from P5 logic, through switch, back to P4.
You need spindle on/off relay or switch here. If you just bridge it alone to get it active it may just throw up an overload error. (bit like on my sieg X2).


Now bear in mind I have only looked at this very briefly and have no guarantee.