Uneven Layer lines Hypercube Evolution
Posted by AmyTheBun
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Uneven Layer lines Hypercube Evolution September 03, 2019 06:13AM |
So. I used to have an Anycubic i3 Mega-S and a week or two ago I converted it into a Hypercube Evolution.
And no matter what I tried I keep having uneven layer lines.
Here are some pictures of the issue. the good one is my old Anycubic that is now nothing but ashes! The bad one is my Hypercube evolution.
Here's an image here in case you don't wanna use the link:
My suspicions so far are the belts, First of all, They're not steel core PU belts. they're just cheap generic ones.
My second suspicion isthe idlers and the overall alignment, When my motors are moving I can see the distance between the belts on the back getting further and closer, As if it's going up and down slowly. I also feel like as the motors change direction, the belt gets pulled/pushed as in it moves in the Y axis in the back slightly. When I move the Y axis back and forth I can see it happening.
The threaded rods+couplings are from my Anycubic which printed really well as you can see. so I doubt that's the cause. Although In my Ancyubic they were installed with some space between the shaft and the rod to have springinessbut on the Hypercube I pushed the shaft all the way down because of my heavy Z axis. without doing that I'd get patterned artifacts on the z axis.
I Also noticed the Y carriage toothed idler is able to freely move up and down and tilt a little. so I put washers under it. it did improve my results (what you see now is with it there) but it also made a horrible noise at high speeds. right now i'm using 3d printed washers in place which solved the noise (smaller outside diameter).
I've tried both Marlin and Klipper with not much of a difference in terms of print quality, Although Klipper is much smoother, Eitherway I'm getting a 32-bit board soon (SKR V1.3. It's on it's way!).
I tried increasing/decreasing the belt tension too. it doesn't change anything.
I've been really getting exhausted over this issue. I don't know what else I can do.
My print settings:
1.5mm retractions (4mm without linear advance)
60mm external perimeters 30mm/s inside and 80mm/s infill and 150mm/s travel.
0.3 linear advance
1500mm/s^2 acceleration.
so far most of these are the same as my anycubic. I haven't bothered with more acceleration/speed until I can solve the issue. OFC I did calibrate the extrusion rate and retractions and e-steps again to confirm it's working well.
the extruder is the same one from my Anycubic. a titan clone. I have a BMG extruder on it's way. It'll arrive in 2-3 weeks.
The hotend is the same clone, Expect I changed the PTFE heatbreak to a 3DPassion Titanium heatbreak (really well polished. the insides are REALLY shiny) when installing it on my Hypercube!
I did 3d print an extruder but it had the same results as the titan. although it worked horribly but I got it working enough for half a benchy to see if the extruder is the issue.
Edited 7 time(s). Last edit at 09/03/2019 07:44AM by AmyTheBun.
And no matter what I tried I keep having uneven layer lines.
Here are some pictures of the issue. the good one is my old Anycubic that is now nothing but ashes! The bad one is my Hypercube evolution.
Here's an image here in case you don't wanna use the link:
My suspicions so far are the belts, First of all, They're not steel core PU belts. they're just cheap generic ones.
My second suspicion isthe idlers and the overall alignment, When my motors are moving I can see the distance between the belts on the back getting further and closer, As if it's going up and down slowly. I also feel like as the motors change direction, the belt gets pulled/pushed as in it moves in the Y axis in the back slightly. When I move the Y axis back and forth I can see it happening.
The threaded rods+couplings are from my Anycubic which printed really well as you can see. so I doubt that's the cause. Although In my Ancyubic they were installed with some space between the shaft and the rod to have springinessbut on the Hypercube I pushed the shaft all the way down because of my heavy Z axis. without doing that I'd get patterned artifacts on the z axis.
I Also noticed the Y carriage toothed idler is able to freely move up and down and tilt a little. so I put washers under it. it did improve my results (what you see now is with it there) but it also made a horrible noise at high speeds. right now i'm using 3d printed washers in place which solved the noise (smaller outside diameter).
I've tried both Marlin and Klipper with not much of a difference in terms of print quality, Although Klipper is much smoother, Eitherway I'm getting a 32-bit board soon (SKR V1.3. It's on it's way!).
I tried increasing/decreasing the belt tension too. it doesn't change anything.
I've been really getting exhausted over this issue. I don't know what else I can do.
My print settings:
1.5mm retractions (4mm without linear advance)
60mm external perimeters 30mm/s inside and 80mm/s infill and 150mm/s travel.
0.3 linear advance
1500mm/s^2 acceleration.
so far most of these are the same as my anycubic. I haven't bothered with more acceleration/speed until I can solve the issue. OFC I did calibrate the extrusion rate and retractions and e-steps again to confirm it's working well.
the extruder is the same one from my Anycubic. a titan clone. I have a BMG extruder on it's way. It'll arrive in 2-3 weeks.
The hotend is the same clone, Expect I changed the PTFE heatbreak to a 3DPassion Titanium heatbreak (really well polished. the insides are REALLY shiny) when installing it on my Hypercube!
I did 3d print an extruder but it had the same results as the titan. although it worked horribly but I got it working enough for half a benchy to see if the extruder is the issue.
Edited 7 time(s). Last edit at 09/03/2019 07:44AM by AmyTheBun.
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