1 Topic by russcox

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Topic: Extruder leaking, ABS not sticking

I'm attempting to troubleshoot my printer's problem, since I've never been able to get it to print the first layer correctly.  I've got a solidooble 2 without a case but with a heated bed. When in idle the extruder leaks and the ABS curls up.  I remove it, but during the print I'm thinking it is always extruding, even when it shouldn't be.  Thus there is extra globs here and there- the head runs into them and starts dragging the first layer of the print around the bed.

I've updated the firmware, leveled the print bed, increased the first layer thickness by 150%, decreased the speed by 80%, increased the bed temperature to 100 C with no luck. 

Right now I'm trying to decrease the extruder temperature to 175 C, my thought being that maybe the temperature gauge is underestimating the temperature.  I manually set the extruder temperature to 175 C, change the sl3cr g code to read 175 C in both places, but when I hit the print button on repetier, everything switches back to 195 C.  The printer waits for the head to heat up, develops a glob of ABS and right before I can remove it, it starts printing a giant glob.

Any advise?

2 Reply by driggers

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Re: Extruder leaking, ABS not sticking

Yes.  You MUST install a glass bed, use hair spray, install thumb screws, and perhaps make a cover out of cardboard (stick on with magnets, kept away from electronics board).  It is an easy thing to do and it solves three problems:

1. The glass is perfectly flat, so imperfections in your aluminum bed (unevenness) will no longer be a problem.
2. Parts stick very well to glass / hair spray (You might need to try a couple of brands).
3. Removal of parts is easier because you take the glass out to pry (yes, literally pry sometimes) them off.

These updates took me less than a day, and they changed the game for me.

SD2 Sanguinololu 1.3a atmega1284p, wood platform, lawsy's carriages, braided fishing line, pallet wood overhead spool mount, carboard/magnet enclosure, glass bed, E3D v6, bed levelling knobs, extended z-stop, 25A DC-DC SSR for bed heater, everything fixed to the SD2 frame, marlin firmware with some adjustments and extra failsafes enabled.  I'll never give up on you, little printer that could(n't)!

3 Reply by ronsii (edited by ronsii 2013-06-01 05:30:00)

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Re: Extruder leaking, ABS not sticking

Sounds like overextruding is one of your issues and if the stream from the nozzle is curling instead of squirting straight down you may have a partial clog. Here is a great video Ian made up to show how to calibrate extrusion---> http://www.youtube.com/watch?v=JZGdMc2ebPo

4 Reply by russcox

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Re: Extruder leaking, ABS not sticking

Thanks!  I'll try these.  Do I put the glass on the bed, or take the bed off and install it where the bed use to be?

5 Reply by ronsii

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Re: Extruder leaking, ABS not sticking

Most people just put the glass on top of the aluminum bed and adjust the z-stop for the added bed thickness with the glass.

6 Reply by 2n2r5

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Re: Extruder leaking, ABS not sticking

ronsii wrote:

Most people just put the glass on top of the aluminum bed and adjust the z-stop for the added bed thickness with the glass.

+1

SD3 w/ mods:
Glass bed with QU-BD heat pad upgrade, threadless ballscrew w/ 8mm smooth rod, spectra line belt replacement, lawsy MK5 extruder, Lawsy replacement carriage, E3D hotend, Ramps 1.4 w/ reprap discount controller, DRV8825 drivers, 12v 30A PS, Acrylic case, Overkill Y-idlers, Filament alarm, Extruder fan + more.

2n2r5's Website

7 Reply by cckens

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Re: Extruder leaking, ABS not sticking

driggers wrote:

3. Removal of parts is easier because you take the glass out to pry (yes, literally pry sometimes) them off.

Don't know what kind of hairspray you're using, mate, but all my parts pop off themselves after 5 minutes outside the printer.  I hear a little crackle, and then I can just lift the piece off cleanly.  My failures... depends on how far along they are, but that's what razor blades are for...

Just my experiences so far...

8 Reply by driggers

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Re: Extruder leaking, ABS not sticking

cckens wrote:
driggers wrote:

3. Removal of parts is easier because you take the glass out to pry (yes, literally pry sometimes) them off.

Don't know what kind of hairspray you're using, mate, but all my parts pop off themselves after 5 minutes outside the printer.  I hear a little crackle, and then I can just lift the piece off cleanly.  My failures... depends on how far along they are, but that's what razor blades are for...

Just my experiences so far...

I do have to pry some things off, even when it's all cold.  I use a razor blade scraper to get under a corner and pop it up.  My hairspray is: Vidal Sassoon pro series, extra firm hold, 4/5 on the scale, in spray can, 397g, $6 from wal-mart.  Ingredients (with spelling errors): water, dimethyl ether, alchohol denat., VA/crotonates/vinyl neodecanoate co-polymer, acrylates copolymer, aminomethyl propanol, glycereth-7 triacetate, ammonium benzoeate, cyclopenta siloxane, acetamide mea, cyclohexylamine, peg-8 dimethicone, fragrance.

Jeez, people put this in their hair?

SD2 Sanguinololu 1.3a atmega1284p, wood platform, lawsy's carriages, braided fishing line, pallet wood overhead spool mount, carboard/magnet enclosure, glass bed, E3D v6, bed levelling knobs, extended z-stop, 25A DC-DC SSR for bed heater, everything fixed to the SD2 frame, marlin firmware with some adjustments and extra failsafes enabled.  I'll never give up on you, little printer that could(n't)!

9 Reply by ronsii

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Re: Extruder leaking, ABS not sticking

driggers wrote:
cckens wrote:
driggers wrote:

3. Removal of parts is easier because you take the glass out to pry (yes, literally pry sometimes) them off.

Don't know what kind of hairspray you're using, mate, but all my parts pop off themselves after 5 minutes outside the printer.  I hear a little crackle, and then I can just lift the piece off cleanly.  My failures... depends on how far along they are, but that's what razor blades are for...

Just my experiences so far...

I do have to pry some things off, even when it's all cold.  I use a razor blade scraper to get under a corner and pop it up.  My hairspray is: Vidal Sassoon pro series, extra firm hold, 4/5 on the scale, in spray can, 397g, $6 from wal-mart.  Ingredients (with spelling errors): water, dimethyl ether, alchohol denat., VA/crotonates/vinyl neodecanoate co-polymer, acrylates copolymer, aminomethyl propanol, glycereth-7 triacetate, ammonium benzoeate, cyclopenta siloxane, acetamide mea, cyclohexylamine, peg-8 dimethicone, fragrance.

Jeez, people put this in their hair?


Not only that but they breathe it while putting it on their hair...

10 Reply by russcox

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Re: Extruder leaking, ABS not sticking

Well, I have the glass and the shampoo, what is the best way of resetting the Z stop height?  Via software or via manually adjusting the Z stop?

11 Reply by cordvision

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Re: Extruder leaking, ABS not sticking

Shampoo? I hope that is a joke... if not, that is your problem why you can't print properly. You are supposed to use hairspray and not shampoo.

12 Reply by solijohn

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Re: Extruder leaking, ABS not sticking

Various natural glues work quite nicely as well. Some users have had great success printing with Ceramic tiles as well.

Former Solidoodle employee, no longer associated with the company.