constant under extrusion  

RE: constant under extrusion

This is the user-user support forum. For technical support under warranty, you may want to take advantage of Prusa's excellent customer support. For best response, log into the online store and contact support via the chat function. Email is normally used for ongoing troubleshooting and is not quick to respond initially.

RE: constant under extrusion

But before you do that, the line of "pink pixels" is almost certainly the screen protector that is there to prevent damage during assembly and transit.

RE: constant under extrusion

@gordon-w

YES, someone mentioned it to me before too but I totally forgot, I wanted to keep the tape remaining (I'm one of those people), but as soon as I took it off I realized the pink pixel was a line on top of the tape.

RE: constant under extrusion

Is the live prusa chat box not available because of the holidays? I can only find the email page

RE: constant under extrusion

Live Chat is still available, on this page, at least...   
https://shop.prusa3d.com/en/

BUT you have to wait about 3 seconds for it to load.... 

regards Joan

RE: constant under extrusion

@doobybooby

may I ask you how much did you read about 3D printing before your first print?

Would be great to describe a bit more what did you print, filament type, temperatures etc.

Otherwise yuo will get generic answers like check your temperatures, nozzle etc. 

Try this way : https://forum.prusa3d.com/forum/english-forum-general-discussion-announcements-and-releases/we-want-to-help-you-you-have-to-tell-us/

RE: constant under extrusion

Posted by: @joantabb

Live Chat is still available, on this page, at least...   
https://shop.prusa3d.com/en/

BUT you have to wait about 3 seconds for it to load.... 

regards Joan

As Joan said, contact support through chat.  They will help you.  

RE: constant under extrusion

@doobybooby

With Firefox there might be problems to get into the chatroom. Try another browser like chrome and disable any adblockers.

RE: constant under extrusion

As the others have said, email prusa for support.

The filament grinding, clogging, and underextruding is because you are not printing hot enough for the filament/speeds. Up your printing temps significantly, more than 10C. The mini has an assembly and/or design error and the temps needed are significantly under what the defaults are, sometimes even needing what's printed on the upper end of the box!

RE: constant under extrusion

@aha

"As the others have said, email prusa for support." Generally you'll get much faster support using chat rather than email.

RE: constant under extrusion

@doobybooby

What was the result of your constant under extruding and jamming. That's what I currently have going on and can't seem to fix it.

Thanks!

RE: constant under extrusion

Ditto.  Constant under-extrusion, and jamming, are both driving me crackers.  I’ve had the printer for 72 hours, and I can’t see it lasting another 72 TBH; I’m about ready to attack it with an axe.

I'm printing with Prusament PLA, at the built-in default temps of 215/60.  Using either a Mini-specific 9-square test file or the Prusa badge on the included UBS.

I've washed the bed and used about half a pint of IPA so far, but the under-extruded layers sometimes won’t stick.  And getting the Z-height right has been a total PITA as a result.

But the main problem has been the under-extrusion and near constant jams - despite purging, cleaning with needles, adjusting the idler screw, cleaning out the Bowder extruder (twice), cold-pulling (about ten times) and buggering about with a needle that my eyes can barely see.

oh, and look - the bloody thing's clogged again.  (Actually this shot was from 20 minutes ago - right now I’m getting the sum total of bugger and all out of the nozzle)

RE: constant under extrusion

@Richard D - Don't be shy about contacting support. Again, the online chat is the place to start for a quick response. 

RE: constant under extrusion

Just like yours my prusa mini was suffuring from major under extrusion. What you do is take out the filament in your printer and on the side of the heatsink of the hotend there should be 3 grub screws that hold in the heat break. unscrew the three grub screws( COOL DOWN YOUR PRINTER FIRST)  while holding on the heater block and when the grub screws aren't holding onto the heat break anymore push the heaterblock upwards until it cant go up anymore. then (while holding the heaterblock with gentle but constant pressure going upwards) tighten the three grub screws and  once you are done the heatsink and heater should stay in place.

ps. don't forget to readjust your Super P.I.N.D.A. probe!

-TheMadCadder

RE: constant under extrusion

@bobstro

They appear too busy/shy to talk to me. 🙁

72 hours, and things are definitely going backwards.  I managed to make a pretty good Benchy, but since then my prints have got steadily worse to the point where there is now nothing coming out of the nozzle when printing.  It'll purge (usually), load, unload (occasionally); I can do a cold pull just fine, with nothing there. But sod all when I start printing. I've taken the extruder apart twice, all of the PTFE tubing, and swapped the tubing in the hot end - but SOMETHING is either jamming it or causing it to misfeed.  I thought that things were irritating enough on Weds when I was struggling with first layer heights and bed adhesion - I'd *love* that to be the problem now 🙁

And the little bleeder has just bitten me AGAIN.  Second time in two days; much  more and my hands will look like I've been fighting (again).
Now the light here is going; so another evening of peering at stuff in the gloom awaits.

RE: constant under extrusion

Many underextrusion/clicking/jamming problems are caused by slightly incorrect extruder idler settings, usually a little tighter is the answer but with soft filaments it may be the other way.

Use a stiff paintbrush to clean out any filament debris from the extruder teeth first.

Cheerio,

RE: constant under extrusion

Dear Richard D,

This I am confident that this video should solve your problem. I know because this was the exact problem that I had when I got my mini. The first print was fine but the ones after were under extruding like crazy to the point where the first layer wouldn't even print and when it did it looked splotchy like a pearl necklace.  The Video!

-TheMadCadder

RE: constant under extrusion

I was a bit unfair earlier (perhaps used to chat sessions to support that open instantly - but which never really solve anything).

I had LOTS of time and attention from a nice chap called Guiliano.  We repositioned the nozzle and heater assembly further up within the hotend heatsink (which is helping with accuracy), (reset the SPINDA height), before finding a fault with the tube from the extruder.  Flipped a brass fitting around 180 degrees, and it's managing to print the Prusa badge rather well. 

I still think that the olives on the tube are a little tight, I havent tried loading/unloading this filament yest, and there's probably a bit of work for me to dial in the Z-axis for that perfect first layer.  But what it's doing right now looks completely acceptable - and I haven't had a jam or an under-extrusion for half an hour now 🙂

RE: constant under extrusion

Here's a short update on my first mini+ with issues is that support walked me through checking their QC work after performing a cold pull. My heatbreak was too low. So I pushed it up. The installed PTFE tube was a hair under 43mm long and the spare in the baggy was about 0.5 mm longer, so they told me to use that one. I reset the Super  Pinda height. Did 3 or 4 first layer calibrations to get it dialed in and have been printing for 3 hours with zero issues. Now on to assembling minis 2 & 3. I believe I'll be doing these QC checks on all minis from here on out. Thanksfor all of the advice. Cheers!