[Chivo]

Hi
I really want to make this step driver.
I had to repeat the all thing, but I copied everything.

I spent $150 to buy 6 (LMD18245 ST9) and made 4 pcb board in some PCB factory.

But surprise. It doesn't work, OK.
What did I do wrong?

The problem is that, it only runs in one way (positive), but in the negative way, it doesn't move, It seems like it turns off itself.
And when I tried to go fast (jostik option) it starts to lose steps.
I'm using Mach3, and in the motor options, acceleration and velocity are very low: 5% and 10%.

I think maybe It can be the Pic programming, because when I want to record the HEX file, I had to chose some options, and the program (IC-Prog) I'm using, it doesn't have the same option's names for:
__CONFIG _CP_OFF & _WDT_ON & _HS_OSC & _PWRTE_ON & _LVP_OFF & _BOREN_ON & _MCLRE_OF.

I'm using:
VEXTA step motor PV267-02AA DC 4.8V 2 A.
Crystal Abracon 20MHz
47K resistors to each coil.
PIC 16F628A-I/P

The step motor works great with my gueko drive 212.

Please some help:

[Chivo]

Please some ideas,

[pminmo]

The schematic image isn't readable to comment on. Post the eagle files and maybe we can help.

[H500]

If it only moves in one direction, the DIR input might be unconnected. Another possibility is that your parallel port is not putting enough voltage for your driver.

[Chivo]

Can you tell me what program did you use to program the PIC.

The schematic and PCB were made on PROTEL 2004.

Maybe I can export to Orcad or DXF.

[Lucas-10]

Hi, Chivo.
Change 47K resistors to 10K on CS Out.

By Alan:
Use this equation to work out the resistors you need for your motor's current
limits :-

<resistor in ohms> = 20000 / <current in amps>

Some example values are:-

Resistor Current
200K 0.1A
40K 0.5A
20K 1A
10K 2A
8K 2.5A
6.6K 3A

[Chivo]

I had done 2 step drivers, and I think, it can't be bad cannection, because both behave the same.