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First print continously fails  

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Kevin
(@kevin-2)
Active Member
First print continously fails

I'm having a devil of a time trying to get the first print to work.  I calibrated the PINDA.  It's able to send filament to the hot end, and it does extrude.  I adjusted it to 1.000 and still the filament won't stick to the plate.  What can I look at next?

Best Answer by Zoltan:

Keep in mind, that MMU and the printer, they have rather separate roles.

The MMU is active till the filament comes to the nozzle. The printing is mostly just pure task of the MK3 - apart watching the filament runout by FINDA.

So the filament sticking issue is the same like any other MK3 without MMU. So increase the live-z ( you have chance to do till -2)  or adjust the nozzle tip and PINDA bottom distance.

I had before adjusting the pinda bottom against nozzle tip the life-z at about -1,73

Posted : 30/03/2023 6:00 am
Zoltan
(@zoltan)
Member Moderator
RE: First print continously fails

Keep in mind, that MMU and the printer, they have rather separate roles.

The MMU is active till the filament comes to the nozzle. The printing is mostly just pure task of the MK3 - apart watching the filament runout by FINDA.

So the filament sticking issue is the same like any other MK3 without MMU. So increase the live-z ( you have chance to do till -2)  or adjust the nozzle tip and PINDA bottom distance.

I had before adjusting the pinda bottom against nozzle tip the life-z at about -1,73

even an old man can learn new things 🙂
Standard I3 mk3s, MMU2S, Prusa Enclosure, Fusion 360, PrusaSlicer, Windows 10
PRUSA MINI+ Prusalink + Prusa Connect

Posted : 30/03/2023 6:51 am
Zoltan
(@zoltan)
Member Moderator
RE: First print continously fails

an example https://help.prusa3d.com/article/nozzle-crashed-into-the-heatbed_112003

even an old man can learn new things 🙂
Standard I3 mk3s, MMU2S, Prusa Enclosure, Fusion 360, PrusaSlicer, Windows 10
PRUSA MINI+ Prusalink + Prusa Connect

Posted : 30/03/2023 6:55 am
Kevin
(@kevin-2)
Active Member
Topic starter answered:
RE: First print continously fails

Thanks for the sanity check.  It was working perfectly prior to the MMU upgrade.  I battled with that PINDA adjustment before the MMU, so I guess it's back to that.  Unfortunately I purchased some cheap nozzles and broke two of them off in the hot head.  I had to replace two of them as once a tip is broken off in it, you can't get the thing out.  That added to my frustration, thus this help request.  I did set the distance to -1.5 and still nothing would stick.  I'm thinking its the hot-end replacement that is acting up, but its good to be reminded it's not the MMU.  It was the only change I made (sarcasm).

Posted : 31/03/2023 2:52 am
Zoltan
(@zoltan)
Member Moderator
RE: First print continously fails

Moving the pinda by 0,5 mm lower can reduce the live-z needed, they are several support articles how to do eg. this one https://help.prusa3d.com/guide/height-adjustment-of-m-i-n-d-a-superpinda-sensor-mini-_154547

even an old man can learn new things 🙂
Standard I3 mk3s, MMU2S, Prusa Enclosure, Fusion 360, PrusaSlicer, Windows 10
PRUSA MINI+ Prusalink + Prusa Connect

Posted : 31/03/2023 4:39 pm
Robin_13
(@robin_13)
Reputable Member
RE: First print continously fails

 

Posted by: @kevin-2

Thanks for the sanity check.  It was working perfectly prior to the MMU upgrade.  I battled with that PINDA adjustment before the MMU, so I guess it's back to that.  Unfortunately I purchased some cheap nozzles and broke two of them off in the hot head.  I had to replace two of them as once a tip is broken off in it, you can't get the thing out.  That added to my frustration, thus this help request.  I did set the distance to -1.5 and still nothing would stick.  I'm thinking its the hot-end replacement that is acting up, but its good to be reminded it's not the MMU.  It was the only change I made (sarcasm).

Look for bolt extractors at your local hardware store.  Should be able to extract the head then.  You may have to drill the tip out for the extractor to fit. Some come with the correct size of drill bit.

Posted : 01/04/2023 3:40 am
Robin_13
(@robin_13)
Reputable Member
RE: First print continously fails

 

Posted by: @zoltan

Moving the pinda by 0,5 mm lower can reduce the live-z needed, they are several support articles how to do eg. this one https://help.prusa3d.com/guide/height-adjustment-of-m-i-n-d-a-superpinda-sensor-mini-_154547

I just assembled my MK3s+ last weekend and the image on the web page is different than the description in the assembly manual.  The image shows the tip of the zip tie under the PINDA which it also says on the web page.    The manual states Take a zip tie from the package and place it under the SuperPINDA sensor. Use themiddle part of the zip tie, not the tip. 

So which is correct?

 

 

Posted : 01/04/2023 3:46 am
Diem
 Diem
(@diem)
Illustrious Member

The SuperPINDA is more sensitive so use the middle.

Cheerio,

Posted : 01/04/2023 8:53 am
Zoltan
(@zoltan)
Member Moderator
RE: First print continously fails

Some people tell put a credit card under pinda.

Let me repeat MMU does not have any impact on the first layer.

even an old man can learn new things 🙂
Standard I3 mk3s, MMU2S, Prusa Enclosure, Fusion 360, PrusaSlicer, Windows 10
PRUSA MINI+ Prusalink + Prusa Connect

Posted : 01/04/2023 1:51 pm
Robin_13
(@robin_13)
Reputable Member
RE: First print continously fails

Thanks.  It is what I did.  An update on the web link should be done to emphasize this as well.

 

Posted : 01/04/2023 5:58 pm
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