Extruder/Hot End problem during first layer
Posted: Thu Jul 09, 2015 12:43 pm
First, is the skirt layer considered to be the first layer? I'm having a tough time getting the initial layer down correctly. I'm not sure if it's my hot end or my extruder, i'm still experimenting and searching. I can get the filament to extrude and come out of the nozzle fine BEFORE it actually prints. But after I hit that start button and wait for another 5-10 min to print temp, that's when the initial problem occurs. There seems to be lots of delay when the filament actually comes out of the nozzle(biggest concern). I've looked at the bowden tube and the extrude gears are moving and the filament is moving. But, nothing will come out for a few passes. Then the filament will finally come out. But, then it doesn't stick right away. It'll slide across the surface. I'd say it takes another pass for it to finally stick correctly and then it will start to print correctly. This problem occurs pretty consistent with EVERY print. This problem sound familiar to anyone? From watching other videos, I believe the filament should come out instantly when the nozzle plunges to the correct height.
I've tried to remedy the problem by creating skirt layers. But sometimes, depending on the size of the print, 4 skirt layers isn't enough. I've tried up to 6 layers so far. I've tried more layers with increased distance, but oddly, every time, the filament doesn't come out until the last layer of the skirt. It doesn't stick enough, so the defects gets pulled into or curls into the actual part.
I've also used Aquanet Extra Hold hairspray as well as the elmers glue stick to help with sticking the ABS to the bed. Although, it does help, but it seems I need to apply the hairspray or the glue LIBERALLY. It's still giving me the above problems. The bed is leveled, although, i can try to level it again having the nozzle closer to the bed or have more resistance to the paper scale.
I've let it go and continued print on some simple parts and it seems to be decent. My skirt layers are pretty accurate when it actually prints. Some of the calibration disk thickness' are off a bit, but they're even and consistent. I've printed half a block and the sides are pretty straight besides the "stitch" looking corners/layers.
I'm using MatterHacker's 1.75 purple ABS filament. Using MatterControl. My MatterControl settings are Gene's assembly manual recommended presets for ABS.
Thanks in advance.
I've tried to remedy the problem by creating skirt layers. But sometimes, depending on the size of the print, 4 skirt layers isn't enough. I've tried up to 6 layers so far. I've tried more layers with increased distance, but oddly, every time, the filament doesn't come out until the last layer of the skirt. It doesn't stick enough, so the defects gets pulled into or curls into the actual part.
I've also used Aquanet Extra Hold hairspray as well as the elmers glue stick to help with sticking the ABS to the bed. Although, it does help, but it seems I need to apply the hairspray or the glue LIBERALLY. It's still giving me the above problems. The bed is leveled, although, i can try to level it again having the nozzle closer to the bed or have more resistance to the paper scale.
I've let it go and continued print on some simple parts and it seems to be decent. My skirt layers are pretty accurate when it actually prints. Some of the calibration disk thickness' are off a bit, but they're even and consistent. I've printed half a block and the sides are pretty straight besides the "stitch" looking corners/layers.
I'm using MatterHacker's 1.75 purple ABS filament. Using MatterControl. My MatterControl settings are Gene's assembly manual recommended presets for ABS.
Thanks in advance.
I'll try the specific UHU stick to see if there's any difference than the Elmers Disappearing Purple. I'll try a few times and if not, I'll try the PEI.