4AxisCNCShield

[Anonymous]

I was having a few problems getting the GcodeCNCDemo4AxisCNCShield code to work with my nema 17 motors; I was getting a high frequency noise and judder but the motors wouldn’t turn. After comparing the code with that in similar sketches I found that adding a short delay between the digitalWrite commands solved the problem.

digitalWrite(motors[motor].step_pin,HIGH);
delay(1);
digitalWrite(motors[motor].step_pin,LOW);
delay(1);

I’ve no idea if this is the correct solution but it worked for me.

[Dan]

In onestep() you may find a delayMicroseconds(1500) is enough. CNCShield was contributed by a fan.

Where you see

a[j].over -= maxsteps;

digitalWrite(motors[j].step_pin,HIGH);
digitalWrite(motors[j].step_pin,LOW);

You might be able to get away with

digitalWrite(motors[j].step_pin,HIGH);
a[j].over -= maxsteps;
digitalWrite(motors[j].step_pin,LOW);

instead of a delay.

[Author]

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