Finally finished designing a simple, adjustable Z end-stop for my mutant bot. I didn't have any M3 bolts long enough for the assembly so I had to use a #4-40 bolt instead. I also had a bunch of unused wing-nuts to boot so it worked out fine, just looks a bit bulky.
|Printed and installed.|
Since I'm almost done finalizing the 2nd iteration, I went ahead and printed out the small parts, two pulleys and two Z rod holders.
The prints came out nice but I couldn't figure out what was causing these tiny blobs to form. I thought it had something to do with the retraction but after going through a series of retraction settings, I had a feeling something else was in the mix. After inspecting them under a magnifying glass, I noticed there was this wavy pattern running along the X and Y path. I remember reading about this problem somewhere on the reprap forum. Basically it's the result of the belt's teeth bouncing along the "flat" pulley. I didn't think GT2 belts would be affected by this but I guess I was wrong.
|Y Pulley belt flip|
Solution: Flip the belt around!
|X Pulley belt flip|
Fired up another print and boom, barely a blob in sight.
Slic3r 0.9.9 just came out and I wanted to tackle that torture test print again since I was pretty disappointed on how it came out....I know it can perform better than that. For this print, I'll be using three of these:
- Hairspray + Elmers stick glue on the HBP, no kapton tape
- Belt flip trick
- Slic3r 0.9.9
; generated by Slic3r 0.9.9-dev on 2013-04-01 at 16:25:21
; layer_height = .1905
; perimeters = 3
; top_solid_layers = 3
; bottom_solid_layers = 3
; fill_density = .3
; perimeter_speed = 50
; infill_speed = 100
; travel_speed = 195
; nozzle_diameter = .35
; filament_diameter = 1.63
; extrusion_multiplier = .89695
; perimeters extrusion width = 0.55mm
; infill extrusion width = 0.70mm
; solid infill extrusion width = 0.55mm
; top infill extrusion width = 0.55mm
; support material extrusion width = 0.70mm
; first layer extrusion width = 0.70mm
|The belt trick and the new slic3r's new "avoid crossing perimter" option made a very clean print.|
The Hairspray + Elmers Glue combo worked out really well. I don't have to worry about ripping the kapton tape since I'm not using any at all anymore. After waiting for a few minutes to cool down, I laid out some water around the brim to loosen up the adhesion. The moment I loosen the brim with my tweezers, the part literally popped off the glass.