[Trev133]

Hi. Looking for some help in identifying the attached controller. It is in a Chinese 3040 CNC which I recently purchased. I am trying to know the details or manufacturer so I can try and identify points on the PCB to connect Homing/Limit switches. Any help would be appreciated.
Trev

[GerryG]

It's most likely a TB6560-derived board. To be brutally honest though, they're utterly crap - not the TB6560 bit necessarily (although they're not a great stepper driver IME), but the board and set up on the stock boxes you get with these routers is mediocre at best. I swapped mine out for one of the chinese planetCNC clones, and found that to be very good - to the point where I'm genuinely looking at shelling out for the genuine article, because it's worth supporting the guy responsible.

Anyway - back on topic: IIRC, those plugs at the bottom of the second picture are limit switch lines. I'm not 100% on that, but am fairly confident. You may have to pull the board out and see if there's a reference number silkscreened on the underside though.

[Trev133]

Thanks Gerry. Will maybe lift it out and look on underside.

[Trev133]

Found this photo on internet search which looks similar layout to my board. Anyone know how I can confirm with a meter if points are for limit switches. On my board they are not marked. (ref 1st post)

[john-100]

not sure how close to your board this will be

CNC, Hacks, Projects...: CNC Engraver Schematics (YOOCNC-NT65-3X)

John

[Trev133]

Thanks John. Will have a look

[john-100]

I have now found more links to cnczone posts I remembered but could not find until now
cnczone member Rakounet has reverse engineered the spindle control board


https://www.cnczone.com/forums/chine...48748-cnc.html

https://www.cnczone.com/forums/chine...oc-pw3024.html

John

[Trev133]

Brilliant info John. Really appreciate all your hard work.
Trev

[Trev133]

Hi. It's me again still with limit switch question. Almost ready to go but I have the switches set up as normally closed. Should I have them set up as Normally open with this board?
Trev

[hof]

Hi. It's me again still with limit switch question. Almost ready to go but I have the switches set up as normally closed. Should I have them set up as Normally open with this board?
Trev

Limit switches should be normally closed so that they would trigger if the switch would break rather than just silently stop working.
I have added limit switches to my own 3040 using the same controller and can assist you if you have any further questions.