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This is what i did
I used a grade 5 bolt (1 dollar)
Machined teeth onto it then heat treated it

I contacted them directly... shipping is 712 usd... the aliexpress thing is just for advertising... You order the machine through Alibaba...I also downsized to the 6090 to lower the shipping cost a...

Hello everyone... I am very interested in purchasing (Chinese) cnc off aliexspress . The model is ACCTEK 6012. I was wondering if anyone has ordered a cnc off aliexpress and what your experience...

look into setting up the bit itself as a limit switch..... by using 5v current from the breakout board and a conductive surface u can let the machine know the length of the tool... if u search limit...