Good Day All.
I am trying to find out how to fix a problem with my TB6560AHQ based stepper motor driver board.
I am sure most of you have seen these on eBay.
They are made by: hyu68.com model number: HY-TB4DV-M.
The unit works fine up to around 4.8KHz step pulses then the TB6560AHQ chip stops responding.
Reading the datasheet for the TB6560AHQ say that it is good for up to 15Khz.
Looking at the PCB and following the step input traces, this is what I have come up with for the step input schematic.
All the resistors are very small SMD type, so quite hard to read the numbers, but I think I have got them all right.
Lucky for me I have a USB PicoScope, so I could look at the step pulse from the PC and the step pulse to the TB6560AHQ chip.
Here are a few scope screenshots.
http://www.mad-professor.co.uk/Misc/TB6560 Step @ 300Hz.jpg
http://www.mad-professor.co.uk/Misc/TB6560 Step @ 4.1KHz.jpg
http://www.mad-professor.co.uk/Misc/TB6560 Step @ 5KHz.jpg
TestPoint1 = Blue Scope Trace.
TestPoint2 = Red Scope Trace.
This is as far as I have got with testing.
So if anyone could advise me to what the problem could be that would be grate.
Thanks for your time.
Best Regards.
I am trying to find out how to fix a problem with my TB6560AHQ based stepper motor driver board.
I am sure most of you have seen these on eBay.
They are made by: hyu68.com model number: HY-TB4DV-M.
The unit works fine up to around 4.8KHz step pulses then the TB6560AHQ chip stops responding.
Reading the datasheet for the TB6560AHQ say that it is good for up to 15Khz.
Looking at the PCB and following the step input traces, this is what I have come up with for the step input schematic.
All the resistors are very small SMD type, so quite hard to read the numbers, but I think I have got them all right.
Lucky for me I have a USB PicoScope, so I could look at the step pulse from the PC and the step pulse to the TB6560AHQ chip.
Here are a few scope screenshots.
http://www.mad-professor.co.uk/Misc/TB6560 Step @ 300Hz.jpg
http://www.mad-professor.co.uk/Misc/TB6560 Step @ 4.1KHz.jpg
http://www.mad-professor.co.uk/Misc/TB6560 Step @ 5KHz.jpg
TestPoint1 = Blue Scope Trace.
TestPoint2 = Red Scope Trace.
This is as far as I have got with testing.
So if anyone could advise me to what the problem could be that would be grate.
Thanks for your time.
Best Regards.
Last edited: