The problem is in between the start code and the S3D generated code. If S3D prints a skirt the start of the skirt is missing but from skirt to model works fine. If I print an extrusion line at the end of the start gcode.. the start of that line is normally slightly messed up because it's the first thing to print but then when I jump to the skirt you'd expect it to be ready to print and working but the skirt is still missing a bit.jimc wrote:well i cant comment on the dual extruder part of your question but the whole point of printing a skirt is to pressurize the nozzle before you start printing your model. its pretty normal for the start of your skirt line to be missing a little. if you are done your skirt though then jump to your model and you still get the problem yet again then what your have seems more of a mechanical issue.
So what I do is extrude a bit of filament then wait for the print to start. Much like extruding a line or whatever. But it seems no matter what type of start code I use, when I move to the model you can see that initial retraction and then extrude but for whatever reason I always miss the first cm or so of the extrusion, then it works great. This hasn't been a problem if I use a 1 layer skirt but now that I'm doing duel extrusions the 2nd material to print always has this issue. Very annoying.G0 Z0 (Position Height)
G92 E0 (Set E to 0)
G1 E6 F300 (Extrude 6mm of filament)
G92 E0 (Set E to 0 again)
G1 X-110 Y-65 F300; (Slow wipe)
G1 Z0.6; (Raise back up)
M73 P0 ;@body (notify GPX body has started)
; **** end of start.gcode ****
G1 E-1 F1800
; layer 1, Z = 0.16
; tool H0.2 W0.42
G0 X20.21 Y20.21 F7200
G0 Z0.16 F900
G1 E1 F540
I have this same problem when the second extruder starts making my support. It always starts with a few cm missing plastic. There doesn't appear to be a way to solve this problem in Simplify3D. To solve this you need a "purge wall", and there is no such feature in Simplify3D.dennisjm wrote:...This hasn't been a problem if I use a 1 layer skirt but now that I'm doing duel extrusions the 2nd material to print always has this issue. Very annoying.