Commissioning ...
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Yup - tried setting it -1 but that seems to be ignored ...
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Not -1. Zero.
And, you may need to unplug that sensor during commissioning, or get it to read room temperature.
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Resistor is currently around 97 ohms, I'll try removing it but I'm sure it goes to -273. I've tested what I need to now.
Would be useful to include extruder commissioning in the commissioning docs, then comes the temperature commissioning and tuning ... who knows I may even get a print out before the end of Feb on the new box.
I'm used to Marlin and Prusa's expertise, RepRap and building my own is new territory ...
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@Garfield said in Commissioning ...:
Resistor is currently around 97 ohms, I'll try removing it but I'm sure it goes to -273
I believe I've commissioned with -273 before, and target of 0. About 99% certain... but I could be wrong.
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Just tried it. unplugged sensor, -273.1, active and standby targets both 0.
M302 P1
G91
G0 E10Extruder moves, no heater turned on. In fact, sensor shows "fault" and extruder still moves.
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If I use that I get the error 'No tool selected'
The second I use T0 to select the extruder the heater enables ...
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Ah, yes, selecting the tool will definitely enable the heater. You can immediately turn it off in DWC. Just click on the heater itself (it will cycle through Active, Standby, Off).
The heater can be off, and you can still move the extruder (after M301 P1). I just did that (and on a multi tool printer, as well)
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I also selected the tool with the unplugged sensor, let the heater fault, reset it, turned it off, and then moved the extruder (with the three commands above)
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Agreed, I can indeed cycle through or even turn it off, it isn't actually connected fortunately. If I'd had the heater connected and sitting on the desk or someplace else other than in the hot end it could have certainly made the evening more interesting.
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@Garfield said in Commissioning ...:
The second I use T0 to select the extruder the heater enables ...
Sounds like you have set an active temperature on it using G10. I suggest you post your config.g file so we can see what G10 commands you use in it.
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Used G10 from the console in DWC
G10 R-1 S-1
T0As the sensor was showing -0.6, the negatives seem to be ignored.
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You could also temporarily define your tool as having no heaters. For example, if you have M563 P0 D0 H1 in config.g, sending M563 P0 D0 will recreate that tool with no associated heater. That will also allow you to extrude without using M302.
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Thanks Dave, I shall have a play later if only for future reference (I tested the rotation on one of the axis outputs)
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@Garfield @dc42 I've updated this page https://duet3d.dozuki.com/Wiki/Test_axes_or_motors_individually to use G1 H2 movements. I've also added a section on testing extruder stepper motor movement. https://duet3d.dozuki.com/Wiki/Test_axes_or_motors_individually#Section_Testing_extruder_motor_movement
Please could you check/comment for any errors/omissions.
Ian
