Has anyone done anything along the lines of a small filter to put in front of the fans to keep dust, hair spray, etc. out? What kind of filter element would be slim enough and let air flow well but still skim out the larger birds?Medical gauze, folded over three or four layers? When I paint in my workshop with aerosols, I have a 28" shop fan with a like sized furnace filter bunged to the back. It gets full of aerosol fumes sooner than you'd think. That lets me breathe easier.
better to just use a respirator for painting in an enclosed shop! haha
im sure you can probably whip something up with your printer to fit the need, but im curious which fans you need filtered on the printer? would be better to just run an enclosure if your not doing that yet. and take the glass bed out to hairspray it. haha. if your still running on the kapton, hairspray isn't really needed, just a quick acetone wipe before you start the job. so, not quite seeing the need for a filter =\.
]]>Has anyone done anything along the lines of a small filter to put in front of the fans to keep dust, hair spray, etc. out? What kind of filter element would be slim enough and let air flow well but still skim out the larger birds?Medical gauze, folded over three or four layers? When I paint in my workshop with aerosols, I have a 28" shop fan with a like sized furnace filter bunged to the back. It gets full of aerosol fumes sooner than you'd think. That lets me breathe easier.
I have no idea if it will print but it is manifold.
]]>As for starting, I usually heat up the nozzle to extrude a little before a job. Then I shut it off again and pull the excess off when it cools down. My start GCode in Slicer performs a home, then moves to the back right corner, and then begins heating up the extruder. This way when the extruder starts oozing, it only goes out .3mm to the bed and I get pretty good clean starts.
I plan to add the bed code to this as well with some extra wait time (I preffer a 7 minute soak on big prints).
]]>turn on bed heating and wait for it to hit 80
turn on extruder heating
wait for the bed and heater to both reach target temperatures
beep
@pause
then do the actual job
But I regularly will just tick 'Start job when slicing finished' - and as the Bed uses a 'Wait' command, it will heat the bed first, then the Extruder will start heating, giving the bed a nice 3 min or so Soak, then it just starts the print... I'll wander back to the printer 5 minutes later to check it started ok... No alarms needed... 
3d-oodler wrote:You can use gcode m300 for beeps
But is there a way to make this get triggered by the temperatures reaching goal?
M109 S<temp> = ;wait for extruder temp to be reached
I use this in the "Custom G-code" section in Slic3r, which gets executed before the print starts.
Perhaps this also negates the need to use M300 for beep for just this purpose.
Excerpt:
M104 S173 ;set extruder temp and start heating
M109 S173 ;wait for extruder temp to be reached
You can use gcode m300 for beeps
Have it play you a tune if you'd like.
But is there a way to make this get triggered by the temperatures reaching goal?
I mean, you don't need to use this to mark the end of print jobs since RH already has that functionality without having to do custom g-code, and I can't see how to use this to indicate something happening before you even started the job.
]]>I can almost imagine it might even be possible. Take the difference between the start and current images, then compare the differences to see if they are "the same" (modulo a lot of fancy calibration and fuzz factor no doubt).
]]>Have it play you a tune if you'd like.
]]>