PMDX131 + G202 + MACH3 - step lost

[Garkoll]

Hi,
Excuse all for my poor english
I have finish my new control for my cnc.
I used 3 x G202 with PMDX131.
With my first control I don't have a problem, but now I lost the step.
This is the problem:
Engines I am using are these:
Sanyo Denki: 103H8222-6310-12
Technical specs PDF: http://db.sanyodenki.co.jp/stepping_..._e_101-102.pdf
4 colored cables come out from each engine and I connected them in the following way:
ORANGE -> A
BLU -> A/
YELLOW -> B
RED -> B/
I used a 4x1,5mm shielded cable for connecting engines to drives (the shielded cables are grounded on the engine-end and floating at the other end).
I made some tests and I reached to this conclusion:
I set 200 step/units (this value is correct)
I tried to do these movements:
command: G1 X5 measured final position: X5.5 mm
command: G1 X0 measured final position: X0 mm
command: G1 X3 measured final position: X3.3 mm
I repeated this tests several times and results were always the same, so the error is well determined.
Practically, the movement is 1.1mm instead of 1mm
I think I have a problem with my notebook and not with drivers (I formatted and reinstalled Win XP and Mach3 for 3 times).
Can I made another test??
Thanks

[Adamj12b]

It seems like your steps per unit is set too high. Are you using any gear reduction? What is the thread pitch of your screws? After some math I would try "181.81818181818182" in the steps per unit field.

5mm command = 1000 Pulses

5.5mm Actual move / 1000 = .0055mm per step

1mm / .0055 = 181.81818181818182 steps

The same works for the second move you did also:

3mm Commanded = 600 Pulses

3.3 Actual Move / 600 = .0055mm per step

1mm / .0055 = 181.81818181818182 steps


See if that helps at all.

-Adam