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Suspect faulty sensor or something  

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gisborne
(@gisborne)
Active Member
Suspect faulty sensor or something

I’ve had my Mini since it was launched and it’s never worked. The first layer never sticks, no matter what I do.

I’ve tried every piece of advice I can find about fixing this, without anything working.

The first layer never sticks. I’ve put glue on the bed. That doesn’t help.

I think the problem is that I can’t get it calibrate properly. When I run the first layer calibrate, it doesn’t stick properly, and I just keep winding the z axis down. I’ve tried sitting and spinning the wheel for a minute or more, so it goes well down. -1.0 or more.

The head doesn’t obviously move, and the filament doesn’t stick at any point.

The problem might be the eraser-shaped sensor thingy beside the print head. I’ve got it the thickness of a credit card above the bed, although I’ve tried fiddling with that.

I had problems when I first got this that were addressed by sending me a replacement sensor. But I wonder if maybe the sensor I got is also faulty? Is there some way to tell?

Posted : 11/07/2022 2:56 am
Diem
 Diem
(@diem)
Illustrious Member

First wash your print sheet - dish soap and plenty of HOT water.

Then run a first layer Z calibration.

And show us a picture of the result.

Once we have a base to work from we will be able to make informed suggestions.

Cheerio,

Posted : 11/07/2022 10:55 am
gisborne
(@gisborne)
Active Member
Topic starter answered:
RE:

IMG_1752

 

This is with the default 0 adjustment. There is also attached (brief) video.

I tried winding it to the maximum, -2.0 adjustment, and the results are the same.

This post was modified 2 years ago 2 times by gisborne
Posted : 13/07/2022 12:13 am
Chris Laudermilk
(@chris-laudermilk)
Estimable Member
RE: Suspect faulty sensor or something

If you hit -2.0 and are still too high, then you need to move your SuperPINDA sensor to allow the head to get closer.

https://help.prusa3d.com/guide/height-adjustment-of-m-i-n-d-a-superpinda-sensor-mini-_154547

Mini+ (kit) - Revo Micro | Antler Cooling | WiFi (4.4.0RC1)

Posted : 13/07/2022 2:00 pm
gisborne
(@gisborne)
Active Member
Topic starter answered:
RE: Suspect faulty sensor or something

Thanks for the advice.

Adjusting the pinda made no difference. I've tried adjusting it previously.

This is why I suspect a faulty sensor?

Posted : 13/07/2022 10:36 pm
Chris Laudermilk
(@chris-laudermilk)
Estimable Member
RE: Suspect faulty sensor or something

Sounds like it. I'd contact Prusa support at this point.

Mini+ (kit) - Revo Micro | Antler Cooling | WiFi (4.4.0RC1)

Posted : 14/07/2022 3:42 pm
Diem
 Diem
(@diem)
Illustrious Member

I've tried adjusting it previously

Which way did you move it?  It needs to go up by at least a millimetre.

Cheerio,

 

Posted : 14/07/2022 6:53 pm
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