Jam control BED temperature

Comments

• Repetier

  December 2017

  negative temperatures is just a trick to store original temperature while extruders are off. So first part is correct. At the end unpauseExtruders in Extruder.cpp is called:
  
  

  void Extruder::unpauseExtruders(bool wait) {

  #if NUM_EXTRUDER > 0

      // activate temperatures

      for(fast8_t i = 0; i < NUM_EXTRUDER; i++) {

          if(extruder[i].tempControl.targetTemperatureC < 0)

              extruder[i].tempControl.targetTemperatureC = -extruder[i].tempControl.targetTemperatureC;

      }

  #endif

  #if HAVE_HEATED_BED

      bool waitBed = false;

      if(heatedBedController.targetTemperatureC < 0) {

          heatedBedController.targetTemperatureC = -heatedBedController.targetTemperatureC;

          waitBed = true;

      }

  #endif

      if(wait) {

  #if NUM_EXTRUDER > 0

          for(fast8_t i = 0; i < NUM_EXTRUDER; i++)

              extruder[i].tempControl.waitForTargetTemperature();

  #endif

  #if HAVE_HEATED_BED

          if(waitBed) {

              heatedBedController.waitForTargetTemperature();

          }

  #endif

      }

  }

  As you see only with a negative target temperature the bed or extruder is inverted so it always becomes positive afterwards. So from this I do not see how it happens. You could write instead of

  heatedBedController.targetTemperatureC = -heatedBedController.targetTemperatureC;
  

  using fabs

  heatedBedController.targetTemperatureC = fabs(heatedBedController.targetTemperatureC);
  

  Will try tomorrow if I can reproduce it or if you have some special condition causing this. Please try the fabs solution as well to see if this line is responsible for it or the problem lies somewhere else.
• overdrive

  December 2017

  Thanks, will give it a try.
  I will upload the changed firmware as soon as my print is done. Will let you know in about 15 hours.
  
  
• overdrive

  December 2017

  That did the trick! Thank you, working now.
• Repetier

  December 2017

  Ok, glad that it works also it makes no sense:-)
  
  I mean that part is only executed when target < 0 and then sets - negative value which should also be negative. 
• overdrive

  December 2017

  I have found that a lot of things in arduino world and sometimes in ARM world does not make sense. "It's not working, why?" or "It's working, why?"