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Post by greenengineer on Jan 19, 2016 23:34:03 GMT
How'd I do. Haven't had a chance to fit it on yet
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Post by piscanc on Jan 20, 2016 0:04:52 GMT
looks nice, I could use more input... Temps look tad high, and you could use more/faster retraction. layer 0.3 on 0.4 nozzle? What do you think? is wall thickens sufficient on the "outside tunnels"? Mounting should not be tricky, but it will be time consuming, so i don't recommend tearing down your spider yet. or have you done your own bottom half?
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Post by greenengineer on Jan 20, 2016 3:30:58 GMT
All walls are definitely thick enough. I'd be confident enough to put my full weight on this piece. I haven't done a bottom half yet- I'm not sure exactly what my final hot-end situation will look like.
Printed on an Ultimaker V1, PLA at 225C, 0.2mm layer height on a 0.4mm nozzle. I'm guessing these are what I should increase: #define RETRACT_LENGTH 3 //default retract length (positive mm) #define RETRACT_FEEDRATE 45 //default feedrate for retracting (mm/s)
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Post by piscanc on Jan 20, 2016 7:30:43 GMT
I found that retraction length is dependent on nozzle type, ones with longer neck can have more distance, it you are at max, up speed. I use 4mm and 93mm/s (but will try even higher speed) I printed it at 210C, 0.2 layer, 0.3 nozzle.
last version of top cover had some walls too thin, that's way I asked.
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Post by piscanc on Jan 22, 2016 16:12:57 GMT
just got bottom half ver.1 (top part got to .6 until i was happy) again not all internal walls are same thickness, rest i will see as soon as it prints. so far the thinner ones should be used so we don´t waste filament...
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Post by piscanc on Jan 22, 2016 19:43:10 GMT
well it printed, needed oversight and bit help with extreme slope. without installing i see i forgot about washer and nut clearence. i knew it will need cutting for clearance, for hotend holder, but that was left to print easier. for use with plastic hotend it will need additional sanding since nozzle is shorter.
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Post by piscanc on Jan 23, 2016 22:44:43 GMT
After test fitting it will have to go to new version... for additional clearance and redesign at the nozzles...
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Post by piscanc on Mar 4, 2016 10:53:12 GMT
Problems with my cooling and ABS printing. For PLA it was working surprisingly well, i could print from tiny things like x-wing to big almost solid things like that lion head. (head 80% of bed area, with insane amount of infill) heater is on ~70% of the time to keep bed at 70°C. With ABS, its different story. first i had to take off bottom part (10 second job ), since it was printed in PLA and would probably melt. everything was fine, until pwm fan came on. after few layers it started lifting from bed. I slapped on some ABS glue, to continue printing. On next print i lowered PWM to 60%, added brimm, still lifting, then i saw why... Bed surface temp drops too much, because of high airflow. bed heating is on all the time, but bed temp keeps dropping and settles at 105 indicated. I haven't measured, but i presume surface temp drops below 90. Now i am eyeballing and wondering if i could use PC cpu heatsink as passive cooling of hotend, but it might be too heavy. (i would still use pwm, but only for extreme situations, as bridging or extreme slopes) more testing needed, with different fans... images are on G+ "https://plus.google.com/112050613337136711262/posts/6ASJVKi83qV"
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