"Z probe already triggered at the start of the homing move."????
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If your printer has a Z endstop switch, you can home Z using that. See https://duet3d.dozuki.com/Wiki/ConfiguringRepRapFirmwareCartesianPrinter#Section_Homing_Z.
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@dc42 : yes it does have a z e/s. And I am using the same code as is in the link. That part is working fine. It’s just the bed leveling that I need to get ironed out. Thanks.
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Ok, got the new BLT and tested all the wiring and all good. (the Z probe now shows 0 instead of 1000) I decided to try and do all the commands first from the DWC to see what happens, so I did the following....
homed all three axis
dropped the bed 50mm
entered these commands in the DWC...M557 X0:200 Y0:200 S50
M558 P9 X0 Y0 Z1 F500 T5000 H3
G30The bed immediately started rising, but the probe was not deployed. I was not sure if it would deploy once it got to the Z home, but decided I was not feeling real safe about what would happen next, so I stopped it.
Should G30 have automatically deployed the probe, waited until it returned to z home, or some other behaviour.
What should have happened with the commands above?
If these are not correct, can you offer any suggested changes? -
Yes G30 should deploy the probe. Do you have the deploy and retract servo commands entered into the deployprobe.g and retractprobe.g macros in the sys folder?
https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_BLTouch
https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe
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I've went back through this several times. I'm really stumped. When I first fire up the printer, the probe deploys and retracts twice and the Z probe is at 0, so I assume the probe is not defective.
I've looked at the deployprobe.g and retractprobe.g several times and everything looks as the setup directions say.
I've ran through the troubleshooting guild a couple times and I don't see any issues or potential issues related to that.
I ran the commission code to deploy but nothing seems to happen.
I checked that I am connected to the proper pins: 1:red, 2:brown and 8:orange Z probe in: white GND: black
I've added the following to config.g to no effect....
; BLTouch code
M307 H3 A-1 C-1 D-1
M558 P9 H5 F100 T2000
G31 X30 Y15 Z3 P25@dc42 has said I don't need the |1
When I start the single probe, I get
M112
M999
Z-probe was not triggered dring probing moveI can't seem to get the probe to deploy by any method.
I am very sure I am doing something wrong, but can't figure out what.
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So you're saying if you send M401 and M402 in the console nothing happens?
What commands are you using in deployprobe and retractprobe?
M307 H3 A-1 C-1 D-1means that you're trying to use heater pin 3 on the expansion connector. Is that correct? That would mean that your servo commands should use P3. -
@phaedrux That is correct. Nothing. Tried it several time after several restarts
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Here is deployprobe.g
M280 P3 S10
and retractprobe.g
M280 P3 S90
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Try adding
I1to those. -
Ok, is that a pipe or I
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I tried
M280 P3 S10|1
no joy
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it's the letter i, for invert.
M280 P3 S10 I1
M280 P3 S90 I1 -
When I ordered a replacement BLT because of the broken wire, I did not mount it on the printer, but rather just attached and tested the new wire on the old BLT. If I don't get anywhere today on this, I may try switching to the new probe as well. I hate doing that unless I am pretty sure thats where the fault lies
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I'm quite sure that adding the inversion flag will solve your problem.
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Oh wow!!!! It deloyed with M401 and retracted with M402. I tried the I1 and the |1 both and neither would work, but I was not putting a space before them because that is what I thought I saw elsewhere. At any event, it worked. Now I need to back and walk through the testing again.
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Wish I could buy you a cup of coffee, but I suspect you are on the other side of the pond.
Thank you very much!!
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@crchisholm said in "Z probe already triggered at the start of the homing move."????:
I suspect you are on the other side of the pond.
Correct. Trapped in a month long polar vortex.
Glad it's working now.
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Ouch. Then I guess I shouldn't mention the t-shirt and shorts whether we've been having recently. Opps. To late.
