sardonumsei Comments - Answer Overflow

sardonumsei

•Created by tg73 on 10/8/2024 in #fix-my-print

Regular surface distortion pattern towards end of larger first layers VC4

Ok, because my gantry is not bowed and performs fine when everything is cool. The problem on happens when I print a high temp material, which is what I print 90% of the time.

1728 replies

RRCRat Rig Community [Unofficial]

•Created by tg73 on 10/8/2024 in #fix-my-print

Regular surface distortion pattern towards end of larger first layers VC4

So are you saying this entire issue is an assembly problem or just a bowed gantry to begin with?

1728 replies

RRCRat Rig Community [Unofficial]

•Created by tg73 on 10/8/2024 in #fix-my-print

Regular surface distortion pattern towards end of larger first layers VC4

I saw a video you posted where your printer only had short extrusions on the side and the gantry was the rail. Did you do that because of this issue or just to reduce weight?

1728 replies

RRCRat Rig Community [Unofficial]

•Created by tg73 on 10/8/2024 in #fix-my-print

Regular surface distortion pattern towards end of larger first layers VC4

I have used heating wires before on projects with good outcomes. For the electrical connection, you could use a contact at one spot that allows the gantry to heat before printing. Then disconnects when printing. Just trying to get the gantry up to temp faster.

1728 replies

RRCRat Rig Community [Unofficial]

•Created by tg73 on 10/8/2024 in #fix-my-print

Regular surface distortion pattern towards end of larger first layers VC4

I have 2 thoughts on a solution but cannot try due to work travel. The first is what about actively heating the gantry. This could be done with a heater wire. That gets the heat distortion done quickly and should stabilize the gantry at a new equilibrium. Second, could we redesign the hotend for side to side cooling instead of front the back? 2 smaller fans could be used in a push-pull configuration instead of one large one. That would maintain weight balance. The problem there is how to attach the belts.

1728 replies

RRCRat Rig Community [Unofficial]

•Created by tg73 on 10/8/2024 in #fix-my-print

Regular surface distortion pattern towards end of larger first layers VC4

I have not had much time for testing on this because of work travel. I had a project that I had to print and during that print, I had a hotend clog that required me to disassemble my hotend. During disassembly, I found that my nozzle and unf nut adapter were not tight. They were not loose but definitely not tight. When I rebuilt everything, I made sure they were tightened properly while heat soaked. My z offset is lower now and I am not seeing the artifacts on the first layer. I have not done a full first layer test on multiple filaments yet and will try to do some when I get home again to make sure. So check to see if your nozzle and uhf adapters are tight when hot. They could move under heat and explain the issue. I will test and update when I get a chance.

1728 replies

RRCRat Rig Community [Unofficial]

•Created by tg73 on 10/8/2024 in #fix-my-print

Regular surface distortion pattern towards end of larger first layers VC4

I had do print a couple of things so I have not had time to test but ai changed my workflow a bit. Now when ai heat soak, I set the bed heater at 110c and the hotend temp at 150c. I did that on a couple of ASA prints with decent results. They were long and narrow, not full bed. Will try to test some tomorrow.

1728 replies

RRCRat Rig Community [Unofficial]

•Created by tg73 on 10/8/2024 in #fix-my-print

Regular surface distortion pattern towards end of larger first layers VC4

I have multiple buildsheets, pex, textured pei, and smooth pei. They all have the same problems so it is not the buildsheet

1728 replies

RRCRat Rig Community [Unofficial]

•Created by tg73 on 10/8/2024 in #fix-my-print

Regular surface distortion pattern towards end of larger first layers VC4

I am traveling for work this week. I can't start testing until the weekend. I am curious what happens with squares in each corner and one in the center. Also what happens if we change print order. Curious if it is based on geometry or is the problem related to print time.

1728 replies

RRCRat Rig Community [Unofficial]

•Created by tg73 on 10/8/2024 in #fix-my-print

Regular surface distortion pattern towards end of larger first layers VC4

Fantastic. I hadn't tried PLA. We need to get some developers on this thread.

1728 replies

RRCRat Rig Community [Unofficial]

•Created by tg73 on 10/8/2024 in #fix-my-print

Regular surface distortion pattern towards end of larger first layers VC4

ASA, ABS, PETG. I have not done really large PLA prints.

1728 replies

RRCRat Rig Community [Unofficial]