Newbie- Configuration Mach 2 to Mach 3

[cnc-mike]

I'm testing my DIY cnc router, with steppers NEMA 23 1.8º of 16.8 kg.cm and the C4 controler. I've tested Mach 2 and it runs perfect with the next configuration. But I can´t run the Mach3 to work properly, axis Y and Z loose steps...

MACH 2 configuration:
Port #1 0x378 Axis X-Y-Z-A Kernel Speed 25000 Hz
Output pins:
X step port 1 pin 5
X dir port 1 pin 4
Y step port 1 pin 7
Y dir port 1 pin 6
Z step port 1 pin 3
Z dir port 1 pin 2
A step port 1 pin 9
A dir port 1 pin 8
Slave axis_ X -axis -> Slave:A
Motor tunning (X-Y-Z-A)
Accel: 10 units/s2; Vel: 1,2 units/s step per unit=200
Minimun pulse width=15 usec
Direction prechange=3 usec

Mach 3 configuration:
(Like in Mach2) and:
Motor tunning:
Steps per = 200 Vel=120 mm/min Accel=200 mm/s2
Step pulse 1-5 us=2
Dir pulse 0-5 =0

I hope some expert can help me!
Thanks.

[ger21]

If I recall, isn't the steps/unit different in Mach2? Also, you have a pulse width of 15 in Mach2 and 2 in Mach3.

[cnc-mike]

Hi Gerry.
The steps/unit(mm) is 200 both. I have 1'8º step motor, and a screw of M6x1, so it's 200 steps to have 360º, and machine moves 1 mm.
Also yes, I have a pulse width of 15 in Mach2 and 2 in Mach3, but I have tryed all posibilities of combinations Step and Dir pulse with no success. Always I get the same, X (and slave A) axis work fine, but Y and Z motors loose steps.

[ger21]

OK. In Mach2 your accel is 10, but it's 200 in mach3?

[cnc-mike]

Yes. This is the best configuration in Mach 3 I can get to run the motors 'properly'. Others velocities and accelerations make motors work worse.