Search found 43 matches

by IDEngineer
Sat Nov 17, 2018 12:58 pm
Forum: LulzBot Mini
Topic: Brand new Micro Swiss nozzle, still curling coming out of the tip
Replies: 2
Views: 338

Re: Brand new Micro Swiss nozzle, still curling coming out of the tip

OK... I'm going to take a giant risk here and say it's almost working. I experimented with varying the nozzle temperature and it appears to have been about half of the solution. Raising the temperature to 220C got me partway there. The other, less obvious part of the answer is the direction you use ...
by IDEngineer
Fri Nov 16, 2018 5:39 pm
Forum: LulzBot Mini
Topic: Brand new Micro Swiss nozzle, still curling coming out of the tip
Replies: 2
Views: 338

Brand new Micro Swiss nozzle, still curling coming out of the tip

The new nozzle from Micro Swiss arrived a day early. I wasted no time installing it. Result: No change in filament problems. What's happening is the PLA extrudes out of the nozzle and *immediately* curls back into the side of the nozzle, forming a loop. Then that loop drags around, grabbing the firs...
by IDEngineer
Thu Nov 15, 2018 10:32 am
Forum: Hardware
Topic: When to replace the nozzle
Replies: 7
Views: 722

Re: When to replace the nozzle

One thing you haven't mentioned yet that may be part of the difficulty here is overall bed adhesion, the adhesive properties of your PEI sheet can lessen over time due to filament residue that is left behind as well as general things like grime and hand oil. If you are confident that your offset is...
by IDEngineer
Wed Nov 14, 2018 8:16 pm
Forum: LulzBot Mini
Topic: Lulzbot Mini requires huge maintenance
Replies: 27
Views: 2861

Re: Lulzbot Mini requires huge maintenance

Lacking a second 3D printer to generate a "formal" part, and not knowing if the Lulzbot print file is still misdesigned to generate the bad part on my Mini, I resorted to the original 3D printing material - JBWeld! (Specifically, JBKwik so it didn't take 24 hours to cure.) I first created a rough su...
by IDEngineer
Wed Nov 14, 2018 5:02 pm
Forum: LulzBot Mini
Topic: Lulzbot Mini requires huge maintenance
Replies: 27
Views: 2861

Re: Lulzbot Mini requires huge maintenance

Well... we finally have a partial answer. At least to the washer misalignment question. It turns out the X axis limit switch relies on a 3D printed part from Lulzbot. And that 3D printed part is either badly designed, or was misprinted for my Mini. Here is a photo of the right-side X axis limit swit...
by IDEngineer
Wed Nov 14, 2018 4:21 pm
Forum: Hardware
Topic: When to replace the nozzle
Replies: 7
Views: 722

Re: When to replace the nozzle

Could you post some photos of the first layer during one of these failed prints? I'd love to but it never gets through even a few inches of the first layer before the head snags the first layer and drags it off the print bed. The result is always a globby mess of filament on the nozzle. Trust me, I...
by IDEngineer
Wed Nov 14, 2018 3:46 pm
Forum: LulzBot Mini
Topic: Lulzbot Mini requires huge maintenance
Replies: 27
Views: 2861

Re: Lulzbot Mini requires huge maintenance

the Y-axis rods are not intended to "bottom out" in their pockets at both ends. They are normally secured with set-screws. When the Y-axis is in motion, the force acting on the bearings on the end opposite the motor is pulling that bearing assembly toward the motor -- if the set-screws are unable t...
by IDEngineer
Wed Nov 14, 2018 2:49 pm
Forum: LulzBot Mini
Topic: Lulzbot Mini requires huge maintenance
Replies: 27
Views: 2861

Re: Lulzbot Mini requires huge maintenance

At the suggestion of a very helpful forum member, I checked the X and Y steppers on this cursed Mini. Apparently others have experienced this failure to align with the leveling washers, and it was due to cracked motor shafts in the lower-quality steppers on the X and/or Y axes. Turns out my Mini has...
by IDEngineer
Tue Nov 13, 2018 7:54 pm
Forum: LulzBot Mini
Topic: Lulzbot Mini requires huge maintenance
Replies: 27
Views: 2861

Re: Lulzbot Mini requires huge maintenance

Latest update: I backed off the Z axis offset and finally got the nozzle to extrude near the print bed. As expected, it basically trailed a thread which dropped down onto the bed behind the nozzle. It got no "squish", of course, so it didn't adhere very well and as soon as the nozzle came back aroun...
by IDEngineer
Tue Nov 13, 2018 7:37 pm
Forum: LulzBot Mini
Topic: Lulzbot Mini requires huge maintenance
Replies: 27
Views: 2861

Re: Lulzbot Mini requires huge maintenance

Additional things I've tried today: * Removed the nozzle for inspection and cleaning. Hole looks fine. Could see daylight through the nozzle. Used 0.3, 0.4, and finally 0.5mm drill bits to gently clean it out and insure that the hole in the tip was round and not misshapen. No improvement. * Decrease...