Solved Hotend ramming bed even after auto-calibration/mesh compensation
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@fcwilt said in Hotend ramming bed even after auto-calibration/mesh compensation:
Why are you only doing 3 factor calibration?
unfortunatly that is the default at the moment in the configurator.
M305 P0 T100000 B4138 R2200 ; set thermistor + ADC parameters for heater 0
M305 P1 T100000 B4138 R2200 ; set thermistor + ADC parameters for heater 1B4138 is the wrong value of the anycubic kossel.
according to marlin they are ATC Semitec 104GT-2 -
@Veti said in Hotend ramming bed even after auto-calibration/mesh compensation:
unfortunatly that is the default at the moment in the configurator.
Sorry but I don't understand. What has the default got to do with what appears in his bed.g file?
Frederick
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@fcwilt said in Hotend ramming bed even after auto-calibration/mesh compensation:
Sorry but I don't understand. What has the default got to do with what appears in his bed.g file?
if you create a delta configuration in the configurator.
https://configtool.reprapfirmware.org/
the default number of calibration factors for the delta is 3. it should be 6that why the S3 entry is in his bed.g
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@drakestraid, please change S3 on the final G30 line in bed.g to S6. Then auto calibrate a couple of times or until the reported deviation is low and stable, and save the auto calibration results. Then try printing again.
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@fcwilt said in Hotend ramming bed even after auto-calibration/mesh compensation:
We also need to see your config-override file and your homing files.
Here:
; This is a system-generated file - do not edit ; Delta parameters M665 L288.000 R135.400 H220.390 B105.0 X0.000 Y0.000 Z0.000 M666 X1.022 Y-1.171 Z0.149 A0.00 B0.00 ; Heater model parameters M307 H0 A90.0 C700.0 D10.0 S1.00 V0.0 B0 M307 H1 A864.1 C363.4 D5.0 S1.00 V12.8 B0 M307 H2 A340.0 C140.0 D5.5 S1.00 V0.0 B0 G10 L2 P1 X0.00 Y0.00 Z0.00 G10 L2 P2 X0.00 Y0.00 Z0.00 G10 L2 P3 X0.00 Y0.00 Z0.00 G10 L2 P4 X0.00 Y0.00 Z0.00 G10 L2 P5 X0.00 Y0.00 Z0.00 G10 L2 P6 X0.00 Y0.00 Z0.00 G10 L2 P7 X0.00 Y0.00 Z0.00 G10 L2 P8 X0.00 Y0.00 Z0.00 G10 L2 P9 X0.00 Y0.00 Z0.00
@Veti said in Hotend ramming bed even after auto-calibration/mesh compensation:
M305 P0 T100000 B4138 R2200 ; set thermistor + ADC parameters for heater 0
M305 P1 T100000 B4138 R2200 ; set thermistor + ADC parameters for heater 1B4138 is the wrong value of the anycubic kossel.
according to marlin they are ATC Semitec 104GT-2Not using the crappy screw-mount thermistor that came with my kit, using an e3d cartridge style in a genuine e3d V6. Heating isn't an issue, tested heater and measured with infrared thermometer, was within +/-2 degrees of reported.
@dc42 said in Hotend ramming bed even after auto-calibration/mesh compensation:
@drakestraid, please change S3 on the final G30 line in bed.g to S6. Then auto calibrate a couple of times or until the reported deviation is low and stable, and save the auto calibration results. Then try printing again.
I'll try that and see if it works
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@dc42 said in Hotend ramming bed even after auto-calibration/mesh compensation:
@drakestraid, please change S3 on the final G30 line in bed.g to S6. Then auto calibrate a couple of times or until the reported deviation is low and stable, and save the auto calibration results. Then try printing again.
Nope, just tried that. Ran 5 calibrations, got the deviation within 0.005 of the last one each time, and still dragged on the bed.
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@drakestraid said in Hotend ramming bed even after auto-calibration/mesh compensation:
Nope, just tried that. Ran 5 calibrations, got the deviation within 0.005 of the last one each time, and still dragged on the bed.
You don't by any chance have a Z offset set in your slicer?
Frederick
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@drakestraid said in Hotend ramming bed even after auto-calibration/mesh compensation:
G31 P500 X0 Y0 Z2.5 ; set Z probe trigger value, offset and trigger height
If you have a smart effector Z2.5 is a lot.
it should be something very close to 0
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@Veti said in Hotend ramming bed even after auto-calibration/mesh compensation:
@drakestraid said in Hotend ramming bed even after auto-calibration/mesh compensation:
G31 P500 X0 Y0 Z2.5 ; set Z probe trigger value, offset and trigger height
If you have a smart effector Z2.5 is a lot.
it should be something very close to 0
This seemed to do the trick. Thanks!
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@drakestraid said in Hotend ramming bed even after auto-calibration/mesh compensation:
This seemed to do the trick. Thanks!
This is not a value you need to guess at.
A common approach is to position the nozzle just touching the bed (lots of folks use a piece of paper to provide just a bit of gap) and set that position as Z=0 using G92 Z0.
You actually just have to set the Z to some known position, it doesn't have to be 0.
For example, I use a 1mm shim gauge and lower the nozzle till it is just touching and then set Z=1 using G92 Z1.
However you do it once the Z position is accurately set you then use G30 S-1 which will report the Z position at which your Z probe triggered. You can do this several times if you wish to verify that the reported position is consistent.
Once you are satisfied that the reported position is good then you enter that value as the Z parameter in the G31 command.
Frederick
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This is covered at https://duet3d.dozuki.com/Wiki/Calibrating_a_delta_printer#Section_Measuring_the_trigger_height. The G31 Z value for a Smart Effector is typically about -0.1mm.