BL Touch Installation what is Servo Pin?
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@signpostman said in BL Touch Installation what is Servo Pin?:
Should it look like this?
On the Duet3 the pullup should not be enabled.
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@phaedrux said in BL Touch Installation what is Servo Pin?:
@signpostman said in BL Touch Installation what is Servo Pin?:
Should it look like this?
On the Duet3 the pullup should not be enabled.
True but at this point any change might help point to the problem.
Frederick
Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6
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@fcwilt said in BL Touch Installation what is Servo Pin?:
@signpostman said in BL Touch Installation what is Servo Pin?:
@fcwilt I have tried CAT 5 cable and now I have 18 gauge 4 conductor that is not twisted pair
I would remove one twisted pair from the CAT cable and use that. And I would make sure to route it away from any source of noise, like stepper wiring.
Frederick
This might be your best bet. Short of a toolboard.
As a sanity check can you test the bltouch with a much shorter length of wire with the probe not mounted on the print head? Keep it vertical and trigger it by hand to see if it will stop the Z axis.
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@fcwilt Agree
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@phaedrux What other probe do you suggest that would work with a long cable?
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Maybe a good quality Normally Closed microswitch that you could manually mount before probing with some good quality shielded wire? Or a conductive touch plate that could be moved under the nozzle?
With a printer that size options may be limited?
With better wire the BLTouch may be viable as well.
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@signpostman said in BL Touch Installation what is Servo Pin?:
@phaedrux What other probe do you suggest that would work with a long cable?
What sort of bed do you have? What is it made of. What sort of surface do you print on?
Thanks.
Frederick
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@fcwilt Right now I have a piece of corrugated plastic, so the probe does not get destroyed. I am going to have a aluminum with steel overlay when complete.
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@signpostman said in BL Touch Installation what is Servo Pin?:
@fcwilt Right now I have a piece of corrugated plastic, so the probe does not get destroyed. I am going to have a aluminum with steel overlay when complete.
Will there be any magnets involved like you find in the Buildtak system?
Thanks.
Frederick
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@phaedrux I just shortened the cables and put new fittings on the end
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Still have exactly same issue.
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@signpostman said in BL Touch Installation what is Servo Pin?:
Still have exactly same issue.
Do you have all 5 wires from the BLTouch connected to the board?
Thanks.
Frederick
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Yes Black and Brown connected to the same pin
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I might be crazy but I ordered a new BL Touch, see if it acts the same?
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@signpostman said in BL Touch Installation what is Servo Pin?:
I might be crazy but I ordered a new BL Touch, see if it acts the same?
It's possible that you have a defective one.
It's also possible that the existing one needs adjustment. I've never had to do it but I understand there is some sort of adjustment that sometimes needs to be made.
Frederick
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@signpostman said in BL Touch Installation what is Servo Pin?:
Still have exactly same issue.
Can you explain that issue again? What exactly is it doing and what are you doing? Video?
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@phaedrux When homeall, or when G30, the Z axis lowers the BL Touch until it come into contact with the bed surface. the BL Touch once in contact with the bed, it retracts as it should. The Z axis keeps descending as the BL Touch trys to extend the probe again. It cannot extend so it errors and try's to drive the BL Touch through the Bed.
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So the Z axis never actually stops?
I dunno if this has been linked yet, but this is the safe way to test the probe.
https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe
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@phaedrux I did go through that but couldn't get past this part. I think I am going to wait and see if a new probe works. Thanks for all your help, I will let you know if new probe make a difference.
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I ordered a new BL Touch, installed it and now works perfectly. Looks like it was defective all along.
