Originally Posted by
ciccio
I use WINPIC800: it programs and compares at the same time.
When something goes wrong, I compare, I try to understand if settings are OK,
I try with another new-never used before PIC, etc.
The circuit is soooooo simple, it is very easy to find something wrong in the circuit, and there are only 12 components!
It is built on a dual sided PCB, photoetched, CNC drilled, with some smd components.
Now: I have 5Vcc on pins 4 & 14, I have GND on pin 5, the xtal oscillates on pins 15 and 16, pins 1 & 2 can be setted on gnd or Vcc, outs are on pins 10 to 13.
No short circuits, step-input is on pin 17, pin 18 has a resistor + led to GND,
there is a 330nF capacitor right under the PCB, from pins 4+14 and pin 5,
stepper are new, but I know about this stepper because I used the same elsewhere, etc.It seems so good to use some sort of PWM to obtain microsteps,
I want to test and then use it.
PS tested with another PC, the one we use for other CNC: same result
PPSS: I confirm Telyady: with a pic16f84 there is a very very short pulse
on RB4 (pin10)-tested with signal generator and leds-settings for 200 steps.
With PIC16f84 or '628 nothing seems a stepper sequence
Can someone test the hex?