In case anyone is interested - my settings are currently:
- Hot end: 200C first layer, 180C thereafter
- Bed: 90C first layer, 80C thereafter
- Everything else at Slic3r defaults (everything I tweak seems to make it worse)
One particularly frustrating problem has been large prints curling up at the corners, or failing to stick to the heated bed. Ambient temperatures in my office have been pretty cold lately, which won't help. So... it seemed a good idea to build an enclosure around the Mendel90 to keep it cosy.
I had some spare foamboard which seemed like an ideal material to build the enclosure from. I also added a 2mm glass sheet to the front (a piece of picture frame glass, approx £3) which can be slid in/out vertically by lifting the flap along the front edge. I've only been running with it for a few hours, but it's certainly allowed me to print some larger parts that weren't possible before. Will find a thermometer soon and check the temperature it reaching, but at a guess, I'd say it's in the 30-40 degree range.
Filament is fed through a long slit in top, the slit is covered in thin craft foam to keep the heat in and trap dust. The foamcore is joined to itself with hotglue and to the Mendel90 with white duct tape.
I'm fairly pleased with how it turned out - it was quick to build, very cheap and appears to do the job - it doesn't even look that bad.
Alongside building an enclosure, I also put together a quick filament spool:
It's similar to many already on Thingiverse, but uses cheap aluminium tube and very lightweight parts - 6mm tube for the arms, 12mm tube for the axle (no bearings). On Thingiverse - http://www.thingiverse.com/thing:56694
PS - while writing this I've been playing with the custom start GCode in Slic3r, and now appear to have a clogged hotend - just stopped a print as no plastic was coming out to discover it appears to be leaking out above the nozzle - crap :(
Here's the startup GCode that killed it... derived from nophead's oozefree start