eBay TB6560 Stepper Motor Driver Boards

**1113562** · 20-05-2010

Originally Posted by williamturner1

So is it that Mr ChinaMan's circuit doesn't provide enough protection be it through poor design or poor component choice

The H bridge in the chip itself is designed to discharge the inductance but the board has external diodes as well as protection. I cant see that the problem is the enternal diodes fitted to the board. You could measure to see if the board diodes on the blown chip motor output pins are damaged, If they are not then this implies these were not the reason for the failure of the chip. The diodes are FR307 which are 3A fast recovery diodes. These are rated at 1000V VR witha 200A surge and a 1.3V Vf and can withstand an average of 3 Amps continuously.

Hope this helps

**Swarfing** · 22-08-2010

Rick

By default the manual that comes with these boards show Mach3 setup with simple pics. Anything outside this should be the screw size/ pulley size setup details and motor details. I use EMC2 so can not comment where to set that up in M3. Give that area look first?

**irving2008** · 23-08-2010

are you sure the DIP switches on the board are set the same for all channels, no unexpected microstepping?

On the channels that run slow, are they running cleanly, no graunching noises, or fits n spurts? What pulse width do you have set on Mach3.. it should be 5 or more...

**Jonathan** · 23-08-2010

Originally Posted by irving2008

What pulse width do you have set on Mach3.. it should be 5 or more...

He's got them all set to 2.

**Swarfing** · 23-08-2010

Just a thought can you check the setup of the parallel port in the bios and try ecp/ epp etc in turn. This was an issue for me on the first incarnation of this board.

**John S** · 23-08-2010

5 is a good figure to start at.
Not familiar with that board but can you jumper the charge pump off, if it has one. Some computerers can hickup on charge pumps depending if they buffer the charge pump signal.

**cleansurf2** · 24-08-2010

Awsome feedback, thanks Gents.

Where I'm at at the moment. Just set up my gear on a second PC to do a quick check.
Good results, all working at the same speed now, so proved a BIOS or hardware problem on my CNC PC.
Will check the BIOS config on this, my home internet PC, which has the TB6560 board pluged in, and compare it to my CNC PC.
Will post details of the BIOS settings to help others that may encounter this problem.

I do have some minor "graunching noises, or fits n spurts" on Z axis. Swapped over motors, motor OK, definately the channel.
I adjusted pulse width to 5 (which was maximum) in config/motor tunning/Step pulse (0-5us), nil effect, still some minor graunching.
IS THAT THE PULSE WIDTH ADJUST YOU SEGESTED?

thanks
Rick

**Jonathan** · 24-08-2010

Yes that's the right pulse width setting you changed.

Have you tried experimenting with the max velocity values in that same config? If the motors will only manage 60% then set the value to 60% of what it is now - but experiment you might get more!

**cleansurf2** · 24-08-2010

I checked both my PC BIOS's.
My internet PC (that all axis's worked on). BIOS parallel port setting was [ECP].

My CNC PC was set to [SPP]. I changed it to [ECP]. Good results, well, better.
Now had axis Y and 4 motors turn for a split second and stop (when using manual jog [tab key window]).
Played around for a while, changed dip switch setting on one problem axis for speed, no effect.
Set to 35Khz, my Mach3 original setting was 25khz. nil effect.

I changed the manual jog speed settings from 100% down to 60%, SUCCESS!
Still not real sure why, I am guessing I had exceeded some speed capability somewhere.
loaded a G code (road runner), looked to be working fine (bench test motors only).

Comfortable to start working on my hotwire CNC rig now.
But I can see that the software configuration is where it's going to cost me the time. Mach3 seems bigger than Ben Her at the moment.
Still have to tune it all in once I build my hardware.
Still have to work out how to interface it with Profili2 (RC foam wings / G-code).

Thanks heaps for your input guys.
I will try and add some newbie tips as I plod along discovering issues that may seem a little basic to you guys.
Appreciate any and all advice/comments.

cheers
Rick

**cleansurf2** · 26-08-2010

I will have to probably go that way, adjusting max velocity to what ever it can handle. There is a lot of tweaking I will probably have to do between now and an operating CNC machine. Steep learning curve! At the moment having trouble getting time to put into the project, so I expect to progress slowly at this stage.

I will post significant newbie issues I discover along the way (problems/fixes).
No dought I will be back to pick your brains at some stage with some lame question.

Thanks to all.
Rick