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Thank You Doorknob .

I will call Gecko on Tuesday . I am just very frustrating , I wish and willing to pay a little bit more money so I don't have to go through this debug hell .

I am making...

My Volmeter is set to DC

It is the same for X Y Z Axis

I use a volt metter , put Neg on -B (pin7) , put Pos on +B pin 6 .
The volt metter show 2.2 V

Yes the motor run , Yes it is working but it is fair to have a silence motor when it is idle...

I put my new 10000uf across pin 12 and pin 11 .

The hum sound from my step motor is still lound and clear . Pin 6& Pin 7 of my DB9 is still 2.2 V

:( . Anybody has any ideas ???????

I went to Frys Electronic and purchased a 10000uf capacitor .

I will put it accross my -V and my +V . Hope it would get rid of the motor hum .

I will post the result tomorrow

Orin called and He sugested I Ground my computer, my power supply and my G540 .

I went ouside put a piece of metal to ground and run the wire to my computer chasis , connect with db9 shield and...

Anybody in southern California , If you know the solution : please call me at 1-323-770-1598.

Thank You

You ask for it :

- Redesign the G540 by imagine you are the user , How would do you feel to do the soldering for DB9 with a resistor . Don't design something that any user would curse at the...

Just got my G540 2 days ago.

I try the following Setup :

- No DB25 connection .

- Pin 11&12 > 24V DC

- Pin 10&12 EStop