eBay TB6560 Stepper Motor Driver Boards

[masterploxis]

Hi,

yes now everything is working. I took a different computer and voila ! First i did use a Fujitsu Siemends Laptop - X Axis not working, now i use IBM Thinkpad - and everything is nearly fine. For Christmas holiday i want to get a cheap second hand desktop pc to get the full 5 V out of the parallel port.

Anyway - my x-axis is still sometimes losing steps. I don´t know if this is a general problem with this chinese board or if there´s a mechanical problem. But each day my machine gets better...

Good luck
Andy

[Swarfing]

Check this site and confirm you are all wired up the same way with your steppers http://www.dhgate.com/3-axis-tb6560-...ce3532c9a.html post the configuration you have in Mach3.

[masterploxis]

Hi,
the connection of the stepper motors is ok. Attached you´ll find screenshots from my mach 3 config which should be as suggested. I think the problem comes from PIN 1 with the permanent voltage of -0,22 V.

[Swarfing]

Ok i checked you details against the manual located here www.lz4gv.com/CNC_files/3Axis_Driver_txt.pdf and it checks out correct so if all the wires are properly secured then it must be a problem on the board. I will assume you are using nema23 motors and the voltages for that motor are correct? they are wired for parallel operation?

Have you tried swapping the motors around to eliminate they are he problem? Check the bios on your pc and swap between ecp and epp if you can, some bios have these together or separate. If all this is ok the power up and switch on (not running any operation and check for voltage on the output pins of the board to the motors (A+). Which ever one is not working trace back to before the driver chip to the input pin and see if it is getting a supply. If not then the chance are it will just be one of the opto isolator IC's. You can confirm this by swapping it for one of the others. If they are ok then it will be one of the driver chips. I hope this gets you going in the right direction to sort it.

Paul

[masterploxis]

Hi Paul,

thanks for the detailed answer. Can you do me a favour and check on your PIN 1 (X-Axis Step) the voltage you have ? I have permanent 0,22V. For Y Axis and Z Axis i have step Pin voltage of 0 V, when i move axis in MACH3, voltage changes to -0,02 V. So i asked myself if PIN 1 also should have 0 V when axis it not moved. Or is it normal that PIN 1 has permant voltage of 0,22V ?



Regards
Andy

[Swarfing]

Andy

My board is different than yous as it uses the earlier TA chips, the set up is different but to answer the question i do not get voltage on that pin. A silly question though? you are using the original cable that come with it? as it is not the same as a printer cable.

[gorbo]

Thanks for that MP I tried another PC with a built in LPT and It works, I previously used a PCI-E card which , was not giving a full output on X.
One question I still have how do you wire up the Spindle relay? I have a 230vac Spindle............... again the instructions are vague

[masterploxis]

Hi Garbo,

so far i didn´t connect the spindle relay. I also have a 230v spindle - first i want to get my steppers running without losing steps. Then i will approach the spindle.

Cheers
Andy

[gorbo]

Same here I find its not a problem switching it on by hand, I have not experienced losing steps yet but I dare say I will

[ccmarco]

Maybe someone could be interested about the way i modified ground path around TB6560s in my 3 axis board, blue PCB.

Here is the link to italian forum where i published same photos : http://www.cncitalia.net/forum/viewt...26754&start=10

I also changed Fosc capacitor (pin 7 to ground) from 1nF to 100pF and, in conjuntion to step lines optocouplers bypass, now the board works flawlessy with Fstep of 50Khz.

Yes, i know, datasheet reports 15Khz max ...

But i don't mind about that.

Marco.