PINDA Calibration after Multi material upgrade
 
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chris.p6
(@chris-p6)
Active Member
PINDA Calibration after Multi material upgrade

Hi, I've just completed the upgrade from MK2 -> Multi material. And I cant get past the XYZ calibration, the Pinda probe does not activate when it gets close to the bed.. Here is what I've checked :

*Self test OK
*Probe red light is on
*Probe LED will turn off if I manually touch it with a knife
*Set Height of probe equal to width of cable tie from bed.

During XYZ calibration hotend hits the paper requiring an abort.

I notice if I lower the probe all the way so that its touching the bed, the LED stays on.

So Probe can trigger manually, but the bed isn't triggering it ??

Posted : 20/08/2017 10:13 am
mavu
 mavu
(@mavu)
Estimable Member
Re: PINDA Calibration after Multi material upgrade

This could possibly be a wiring issue, if you have a broken cable, or very badly connecting connector, it might change the resitance enough to throw off the probe.

Its unlikely, but I think its possible.

Maybe check all connectors first?
If you wiggle the probe connector a bit and try again?

If that doesn't help, I have no idea what would make it do that.

Posted : 20/08/2017 11:06 am
PJR
 PJR
(@pjr)
Moderator
Re: PINDA Calibration after Multi material upgrade

Go to the LCD menu option "Show End Stops"

See if the state of the Z end-stop changes when the light goes off - ie when you place a metal object under the probe.

If it does, then you wiring is fine so continue:

With probe level with nozzle, select the menu option "Auto Home"

If the nozzle hits the bed, your probe is not hitting the dotted circle probing point at the front left of the bed; you will need to adjust your printer so that it does.

If Auto-home works fine, you can run XYZ calibration - do this with the probe at nozzle height. If it passes, raise the probe a little and run XYZ cal. Repeat until XYZ fails and lower the probe a little to get it to pass again.

Peter

Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…

Posted : 20/08/2017 12:17 pm
chris.p6
(@chris-p6)
Active Member
Topic starter answered:
Re: PINDA Calibration after Multi material upgrade

Its working now.. but there was a few things I did and not sure which one resolved it... I re-seated all the connections, and lowered the probe even further. In the process I've found my bed to be higher in the centre than on the sides... I wonder if just adding 4x washers to the outside bed screws would fix that.

Posted : 20/08/2017 1:46 pm
PJR
 PJR
(@pjr)
Moderator
Re: PINDA Calibration after Multi material upgrade


I wonder if just adding 4x washers to the outside bed screws would fix that.

Yeah, that can work, but the bed should be a fixed distance from the Y frame, and if that is flat, it should not need correcting.

Check the stand-offs and screws are all firm before trying washers.

Peter

Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…

Posted : 20/08/2017 3:01 pm
chris.p6
(@chris-p6)
Active Member
Topic starter answered:
Re: PINDA Calibration after Multi material upgrade

Hi Peter, I had successfully done the XYZ calibration, but my prints are consistently failing at about 1.5-2cm. With the Marvin, he gets knocked off the bed so I am assuming that the issue is the probe is too low (still above the nozzle) .. I went through your steps above, and I cannot set it any higher. After running "Auto Home" the light on the probe will be off, the slightest pressure on the bed is enough to see the light come on.

Posted : 28/08/2017 2:23 am
PJR
 PJR
(@pjr)
Moderator
Re: PINDA Calibration after Multi material upgrade


Hi Peter, I had successfully done the XYZ calibration, but my prints are consistently failing at about 1.5-2cm. With the Marvin, he gets knocked off the bed so I am assuming that the issue is the probe is too low (still above the nozzle) .. I went through your steps above, and I cannot set it any higher. After running "Auto Home" the light on the probe will be off, the slightest pressure on the bed is enough to see the light come on.

Well, Marvin is very small; I don't think the probe will get close to the print, so I don't think that's your problem. You need to print again and watch to see if there is anything (fan nozzle etc) hitting the part.

May be that you need to clean your bed with acetone to refresh the adhesion or maybe lower Live Z by 20 microns.

Peter

Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…

Posted : 28/08/2017 8:50 am
chris.p6
(@chris-p6)
Active Member
Topic starter answered:
Re: PINDA Calibration after Multi material upgrade

Ok I think the problem is something else... when i found spaghetti and dislodged part I thought it was because it was being hit.. but the bed is level and the probe is clear... I stayed close to the print this time and I can see that well into the print the multiplexer seems to be jamming up.. causing missed layers and that would lead to the rest. I can't see why that would be happening randomly.

Posted : 28/08/2017 4:22 pm
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