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Can't get my heater to turn on. Any suggestions?

Posted by RKMore 
Can't get my heater to turn on. Any suggestions?
November 11, 2012 01:33PM
I an trying to build a completely from scratch printer and I am stuck on a really silly problem that I just can't figure out.

All my motors in all axes work, I am getting a reading from my thermistor, and my heater will turn on if I manually raise the control line SSR to VCC (or even 3,3v) but I simply can not get Sprinter to turn in on.

In my Pins.H file I have heater 0 set to pin 12.

#define HEATER_0_PIN 12

and I have my SSR set up to be triggered by that pin. In fact if I write a quick and dirty ardiuno app to raise pin 12 the heater comes on just fine, but if I load sprinter into the arduino and try to do it, either manually by sending a command like...

M135 P 0 S128

or if I use pronterface to turn it on it simply will not go on.

unfortunately the code in the heater section is a little beyond me and I just can't figure out what the heck is going on.

I am ready to print except for that. Everything else is hooked up and calibrated,
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