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Thread: Bonded Heat bed for 12"
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08-28-2015, 11:10 PM #10
- Join Date
- Apr 2015
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- Lakeport, CA.
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From looking at configuration.h and temperature.cpp, it would appear that the answer is yes.
Looking at the Makerfarm Configuration.h, it's sorta interesting though.
here are some comments from the file:
// Bed Temperature Control
// Select PID or bang-bang with PIDTEMPBED. If bang-bang, BED_LIMIT_SWITCHING will enable hysteresis
//
// Uncomment this to enable PID on the bed. It uses the same frequency PWM as the extruder.
// If your PID_dT above is the default, and correct for your hardware/configuration, that means 7.689Hz,
// which is fine for driving a square wave into a resistive load and does not significantly impact you FET heating.
// This also works fine on a Fotek SSR-10DA Solid State Relay into a 250W heater.
// If your configuration is significantly different than this and you don't understand the issues involved, you probably
// shouldn't use bed PID until someone else verifies your hardware works.
// If this is enabled, find your own PID constants below.
//#define PIDTEMPBED
//
//#define BED_LIMIT_SWITCHING
Which is weird..., cuz it sure seems to ACT like some kind of hysteresis is being accounted for..., but I guess not.
SO..., it might be worth a shot enabling "BED_LIMIT_SWITCHING" if it enables a mechanical relay friendly form of hysteresis management.
Otherwise..., PID + SSR seems to be the way to go.
Of course..., your mileage may vary...
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