On Thingiverse there is a saber tooth kitten skull. http://www.thingiverse.com/thing:472463/#instructions
When I print the sabers (separate piece); it gets to the last 20% of the tooth, the print comes off the bed.
Note that these are narrow and tall and slowly overhang. 15mm diameter base, 50mm height,
I am using HIPS natural for this specific piece; with my Taz 4 printer.
I am using the sli3r config provided by lulzbot. I tried the following with mixed results.
- ABS slurry (it was on it), no other changes to config (80 for bed as this is what the abs setting used). This gave me 50% before it failed.
- ABS slurry (it was still on it), modified the bed temp to the correct 60. This gave me 60% before it failed.
- ABS slurry (still on it), 60 bed, brim of 8. This gave me 80% before it failed. (the best result).
- Cleaned off slurry, put on glue stick on warm bed, 60 bed, brim of 24. This gave me 50% before failure (equal to worst).
- Cleaned off glue, another glue on cold bed, Skirt of 0, brim of 24. This failed near 10% as the 0 skirt caused a disconnect between brim. Repeated with skirt set to 26, failed near 10% again. The glue was acting like a lubricant.
- Back to ABS slurry, 55 bed, brim of 12, Skirt 16, AND included Lift of 1 (see below). This gave me 80% before failure.
What I was seeing was that as the head moved between the two “sabers” it would push it down slightly, due to the saber is curved and starts an overhang, and thus cause leverage to pry the brim off the plate. Adding lift caused to not do this in the horizontal plane (switching between the fangs), but it still happened in the vertical plane. It was almost like the filament was going on thicker than what was accounted for in the slice.
So, my two questions.
What is the best way to keep a HIPS object stuck on the bed. Glue stick just didn’t work at all, it acted like a lubricant (is there a specific formula I need?)
How do I account for layer thickness differences that show up so that vertical pressure is not applied in the latter layers?