Need Help!- Stepper motor stall when cable attached to PC.

[hanxiriel]

Hi all.

I am totally new to CNC world. Recently I started learning CNC so hubby DIY a simple CNC router for me to familiarize myself with the machine before moving on the a real CNC Router:Walter6545L.

The link below is to the website where he bought driver board.

http://www.hyu68.com/cp8.htm

1-I have installed PCI parallel card to my desktop in order to run Mach 3 from there. The pc is running on XP.

2-On the laptop, I installed Flash Cut Demo and using USB to parallel converter to connect to the CNC. The laptop OS is Win7.

The problem is, whenever I attached the cable from CNC to the desktop/laptop, all lights on the driver board for X,Y,Z and A axes are on. Hubby said the light is supposed to blink only when the motor is running. I tried running G-code in Mach3 and FlashCut but the motor stalled. They don't respond to the program at all. But when we detached the cable from CNC to the lappy/desktop, all lights went off. We tried jog using pendant and the motor ran nicely.

I don't understand what I've done wrong? It is the cable problem? I tried changing cable, but same problem happened once the cable attached to the PC, the lights were on and the motor stalled. Detached the cable, lights went off and motor running good.

Please, please help me!

Thank you.

Han.

[doorknob]

Some parallel cards output a low voltage signal that may not drive the CNC board properly.

Do you have access to a multimeter? Can you check the voltages on the parallel port output pins? Voltages close to 5 volts should be good. If you have voltages closer to 3.3 volts you may have a problem.

[hanxiriel]

Originally Posted by doorknob Some parallel cards output a low voltage signal that may not drive the CNC board properly. Do you have access to a multimeter? Can you check the voltages on the parallel port output pins? Voltages close to 5 volts should be good. If you have voltages closer to 3.3 volts you may have a problem.

Thank for the reply.

Checked. Pin 14 and 15, are 5V.

The same problem occurred when I attached the cable to the laptop. Just now I tried running Mach3 from the desktop connected to Walter but the machine did not respond too.

Any idea?

[doorknob]

There is a lot of discussion about similar boards at http://www.cnczone.com/forums/genera...y_chinese.html

[hanxiriel]

Thank you Doorknob. Devouring the thread right now.

[hanxiriel]

I had my TB6560 running nicely after found this thread.

http://www.cnczone.com/forums/genera...560_board.html

I set up the pin wrongly in Mach 3. This thread clear any confusion you might have regarding the driver board.

I should myself

Thank you.