Servo deployed probe on Duet Maestro
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Thanks. I hope to get to a position over the weekend to be able to test everything. This will be useful.
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Post some photos/diagram of your intended wiring and you might get some feedback.
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@Phaedrux I'll add some in the morning before I look to test/proceed. Thanks for the advice.
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i am using this
https://www.thingiverse.com/thing:3303618
and it works on the maestro.
all the connections are going to the z probe header.
gnd is combined and 5v is combined in this case.
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Thanks all. @Veti how did you define that probe in your config?
I plan to try get this working tomorrow
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M574 Z1 S2 ; Set endstops controlled by probe
M950 S0 C"^zprobe.mod" ; create servo pin 0 for BLTouch
M558 P8 C"^zprobe.in" H2 F900 T6000 ; Set Z probe type to switch and the dive height + speeds
G31 P1000 X31 Y-8 Z2.43 ; Set Z probe trigger value, offset and trigger height -
Thanks. I’ll need to work through each command but it’s very helpful having a reference. Appreciate your help
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I've tried to get this to work today. I think the servo may have broken though. I initially was able to get the servo to deploy the probe but the M402 retract command did it not M401 so I figured my deploy and retract settings were obviously wrong. Neither command does anything now.
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Smaller servos can burn out if forced in a way they can't go.
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@Phaedrux That's likely what has happened. I plan to take it out later. I've ordered a new one in case it has. I'll test it out of the printer.
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I've replaced the servo and the probe now deploys. It seems to work fine when I issue M401 and it retracts to M402.
In the dashboard my probe is showing as 1000. I'm a bit lost with this part. I've defined it as a switch with P8.
The nipple microswitch (for want of a better description) I'm currently using has two wires, so different to a microswitch I'm used to where there are 3 connection points. It's a Zippy switch. I'm trying to work out the two wires which at the moment I have one connected to the 3.3v on the zprobe header and the other to the zprobe.in.
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And what do you have in your M558 line? It may need to be inverted.
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@Phaedrux This is what I currently have.
M950 S0 C"^zprobe.mod" ; create servo pin 0 for BLTouch M558 P8 C"^zprobe.in" H5 F120 T6000 ; Set Z probe type to switch and the dive height + speeds G31 P1000 X-20 Y-10 Z15 ; Set Z probe trigger value, offset and trigger height -
Try this
M558 P8 C"^!zprobe.in" H5 F120 T6000
G31 P500 X-20 Y-10 Z15 -
@Phaedrux Thanks, it's now showing as 0!
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So I'm following the test guidance. To manually test. I've just ran G30 and the probe deploys and Z starts to move up but then an error is triggered.
G30
Error: Z probe was not triggered during probing moveIt may be one for the morning.... a clear head and do some more reading.
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@Blacksheep99 said in Servo deployed probe on Duet Maestro:
Z starts to move up
This is ambiguous. Do you mean the probe and the bed are getting closer together?
G31 Z15 means the nozzle is 15mm above the bed when the probe triggers? Is that correct? Yet your dive height is only 5mm M558 H5.
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@Phaedrux said in Servo deployed probe on Duet Maestro:
@Blacksheep99 said in Servo deployed probe on Duet Maestro:
Z starts to move up
This is ambiguous. Do you mean the probe and the bed are getting closer together?
G31 Z15 means the nozzle is 15mm above the bed when the probe triggers? Is that correct? Yet your dive height is only 5mm M558 H5.
Sorry, I'll try be more clear. The bed starts to move up towards the nozzle which is on a fixed XY. The probe deploys immediately.
No the nozzle is close to the max 150mm build height. I've clearly misunderstood that part of the code.
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Now that you have it working give this a shot
https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe
Your dive height should be slightly higher than your trigger height.
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@Veti said in Servo deployed probe on Duet Maestro:
i am using this
https://www.thingiverse.com/thing:3303618
and it works on the maestro.
all the connections are going to the z probe header.
gnd is combined and 5v is combined in this case.
So I've ditched my old probe and made one of these today. I've connected it up and it seems to be working as it should. I just can't get my head around what I need to get this to work with my printer. By that I mean bring the bed up, probe deploy and then bed probed.
I'd appreciate some guidance, just to help my understanding.
