Tb6560ahq ic

[Philly]

Update: I have replaced the chips, Y axis is fine now but the X has the same issue(I guess it wasn't the chip). The signal doesn't seem to get around the driver and I think the optocouplers are the problem. I have bridged pin 2 to pin 7 on the 6n137 Opto and now I have slight twitches. The red led flickers when the jog button is pressed now(it never did) but the motor only makes a slight twitching move and moves maybe 0.5mm :)

Do you think the opto just needs replacing?

Thanks

[Jonathan]

Do you think the opto just needs replacing?

Quite possibly. You should measure the voltage before and after the opto-isolator to verify as it could be a problem with the parallel port.

[Musht]

I have bridged pin 2 to pin 7 on the 6n137 Opto

Thanks

Data sheet looking at would make that 2. LED anode to 7. VEnable

mebbe wanting 6. VOut

http://www.fairchildsemi.com/ds/6N/6N137.pdf