Hi at all,

I'm a newbie in CNC and similar, and want to give a try to see what can i do. I want to upgrade in future all of electronic, and the mechanic parts, but now is only on testing phase.

My setup is an old HP workstation connected via LPT port to a Chinese Cheap TB6560 board, the red one that support 4 axis + one, that take power from a 24v 30Amps switching power supply. I have connected three Nema23 stepper motor to my board.

So... now the bad thing... while routing the Z axis motor cables, moving the machine with cables detached from motor but not from board, they took the machine steel bars and make the Z axis Toshiba driver smoke... I think the power was on only for 5/8 sec after the short circuit.

After that only the X axis works and not in perfect manner. When finish the movement the motor make a noise for 3 sec like a "buzz"...

I took off the third TB6560 broken and then nothing changed. So i have changed the three 74HC14D in photo and something happen. The X axis, even without command from pc, remain with a bit of power and the stepper make a buzz, when i press the left or right arrow it moves but not smoothly. the Y axis remain fixed on but no current reach the motor.

the Z obviously doesn't work without the driver chip, and the A, which i tried to convert in Z, does not make anything. no LED, no Current reach motor.

If you have some suggestion, other than switch to another board (if that, suggest something relative cheap such as good tb6600 board), i'm pleased to hear it.

Thanks in advance for your patience.

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