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.

SignPostMan

@fcwilt Agree

SignPostMan

@phaedrux What other probe do you suggest that would work with a long cable?

Phaedrux

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.

fcwilt

@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

SignPostMan

@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.

fcwilt

@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

SignPostMan

@phaedrux I just shortened the cables and put new fittings on the end

SignPostMan

Still have exactly same issue.

fcwilt

@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

SignPostMan

Yes Black and Brown connected to the same pin

SignPostMan

I might be crazy but I ordered a new BL Touch, see if it acts the same?

fcwilt

@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

Phaedrux

@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?

SignPostMan

@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.

Phaedrux

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