Weird z-height variance
I've been using my Mendel90 much less regularly recently and have spotted something weird with my first layer height. All of the following observations are from the same .gcode file, so no slicer...
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Hi, There are only two things that I can think of: First time bed cleaning differs from inter-print cleaning Effects on the filament when left in the extruder for a long period My logic for the first...
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Quoteneildarlow As an aside, I have noticed that my initial ooze-free startup characteristic has changed recently. I used to get a small blob followed by a thin line before the fat wipe line was...
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Ok, this is getting frustrating now. I've loaded some new filament (freshly opened from its vacuum sealed pouch) to run some test prints and it would appear that the OPPOSITE occurs from what you...
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Hi, Ignoring the adhesion aspect of these tests, can you measure the thickness of the surrounding skirt and assess any changes in its width between the print runs? I am trying to determine whether...
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Quote The first layer height only reverts to being ‘too thick’ if I leave the printer off for an extended period – a week or more as has often been the case recently. Quote If I turn off the printer...
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When I first noticed the problem I had stopped using the printer as regularly as I used to, so assumed it was somehow connected to the lengthy period of sitting idle. Looking back at my first post I...
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Eric, Have you changed any of the start gcode script recently? At the AP meet you mentioned that you left the extruder high during bed heating so that it could warm up quicker under a cover. I use the...
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My start gcode hasn't changed in years - the initial pre-heat where I keep my extruder high is for the bed only - the extruder isn't on at all during this phase. Once the bed gets to temperature the...
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Just a wild thought but could it be that the printer is not homing the Z axis the same height every time? This could happen if the limit switch was loose or worn. You could check whether the pointers...
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I've set my Z-pointers to be pointing straight inward at the point where my nozzle is pre-heating above the bed, rather than in the idle position at the top. I figured this is the point where I...
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