So I had a blocked hothead which I have replaced. I’ve read levelled everything but my prints have gone funny. The bottom appears to be missing.
Any idea’s?
if you print single layer bottom then the head is too close to the bed.
Go on ETSY…sell it as Modern art?
Yeah my bottom/top thickness is set to 0.6mm.
So you think it’s too close and just mashing the head into the plate?
it is not the thickness but the offset that is too small. for example if you manual level the bed then use a thicker card rather than some thin paper. you can adjust the z offset both in hardware by moving the z endstop or in software (there are some g-code commands you can use to set a new z offset)
Okay that’s for that. I need to wait till I get a new Biltac sheet as its a mess.
I’ve tried using tape, but I can never get it to work.
Print something one layer height and check results with the caliper. Thickness should be near the first layer height over all the print. I recommend to set amount of top and bottom layers to reach total thickness of 1-2mm. That ensure flat and strong surfaces.
I have my first layer set to 0.3mm, my layer heights set at 0.1-0.2mm (usually 0.2mm) and have resistance when I pull on a piece of paper that I pinched between the hotend and the heated bed when they are hot. You should try the paper test every time you change or disassemble and reassemble the hot end.
I can not claim to have no problems with printing, but first layer issues are most often no greater than too much bed squish. That is a problem I really only notice when there is detail on the first layers like a signature on the bottom of a print.
Bottom layer is way too thin. Whatever my selected layer thickness is (generally 0.1mm) I will print 4-6 of them across the bottom and top after the initial layer to get a nice smooth strong surface. First layer is generally 0.2mm for a 0.4mm nozzle with the nozzle leveled to be 0.075 from the bed by paper test. I use the same distance when using a 0.2mm nozzle but then I use a 0.1mm first layer. First layer issues are very rare for me.
@David_Sherwood I’m only set at 185 so its not temp. From the responses given it has to be a height issue. So I’m going to make sure everything is screwed in right and then relevel once parts arrive to carry on.