Overspeeding / HOMING_FEEDRATE (1 reply)

After updating the firmware to latest build Repetier-Firmware 0.82.2, I had the following problem. When homing the axis (x,y), the speed was very high. It was so high that it destroyed my endstop.

Looked to the config file, and found:

/** Speed in mm/min for finding the home position.  Overridden if EEPROM activated. */
#define HOMING_FEEDRATE_X 80
#define HOMING_FEEDRATE_Y 80
#define HOMING_FEEDRATE_Z 3

Then checked the output of M205

EPR:3 27 1500.00 X-axis homing feedrate [mm/s]
EPR:3 31 1500.00 Y-axis homing feedrate [mm/s]
EPR:3 35 120.00 Z-axis homing feedrate [mm/s]

Went back to the config file and reduced the value.

/** Speed in mm/min for finding the home position.  Overridden if EEPROM activated. */
#define HOMING_FEEDRATE_X 25
#define HOMING_FEEDRATE_Y 25
#define HOMING_FEEDRATE_Z 3

After reseting the printer settings to defaults, checked the output of M205...the same result

EPR:3 27 1500.00 X-axis homing feedrate [mm/s]
EPR:3 31 1500.00 Y-axis homing feedrate [mm/s]
EPR:3 35 120.00 Z-axis homing feedrate [mm/s]

Then changed the value manualy, and it worked then with normal speed

M206 T3 P31 X25

It means for me that the value of HOMING_FEEDRATE_(X,Y,Z) are overwriten somewhere in the code. But I don t know where and why?

Edit: I did a second test. Uploaded Marlin, then tested it. Then uploaded Repetier again.

After reseting the printer settings to defaults, checked the output of M205...the same old result.

EPR:3 27 1500.00 X-axis homing feedrate [mm/s]
EPR:3 31 25 Y-axis homing feedrate [mm/s]
EPR:3 35 120.00 Z-axis homing feedrate [mm/s]

It means the value I typed manualy is still there after a firmware change!?