bissen21/Marlin_Firmware
1
0
Fork 0
Code Issues Pull Requests Projects Releases 4 Wiki Activity

Update Bed PID comments

Browse Source
This commit is contained in:
Scott Lahteine
2018-04-08 06:42:51 -05:00
parent 56486c5c0e
commit dca69efc11
64 changed files with 1280 additions and 832 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
Marlin/src/config/examples/tvrrug/Round2/Configuration.h
View File

@@ -388,23 +388,30 @@
//===========================================================================
//============================= PID > 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 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.
/**
* PID Bed Heating
*
* If this option is enabled set PID constants below.
* If this option is disabled, bang-bang will be used and BED_LIMIT_SWITCHING will enable hysteresis.
*
* The PID frequency will be the same as the extruder PWM.
* If PID_dT is the default, and correct for the hardware/configuration, that means 7.689Hz,
* which is fine for driving a square wave into a resistive load and does not significantly
* impact 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, don't use bed PID until someone else verifies that your hardware works.
*/
//#define PIDTEMPBED
//#define BED_LIMIT_SWITCHING
// This sets the max power delivered to the bed, and replaces the HEATER_BED_DUTY_CYCLE_DIVIDER option.
// all forms of bed control obey this (PID, bang-bang, bang-bang with hysteresis)
// setting this to anything other than 255 enables a form of PWM to the bed just like HEATER_BED_DUTY_CYCLE_DIVIDER did,
// so you shouldn't use it unless you are OK with PWM on your bed. (see the comment on enabling PIDTEMPBED)
/**
* Max Bed Power
* Applies to all forms of bed control (PID, bang-bang, and bang-bang with hysteresis).
* When set to any value below 255, enables a form of PWM to the bed that acts like a divider
* so don't use it unless you are OK with PWM on your bed. (See the comment on enabling PIDTEMPBED)
*/
#define MAX_BED_POWER 255 // limits duty cycle to bed; 255=full current
#if ENABLED(PIDTEMPBED)