After a few 2-3h prints Schorsch is printing an estimated 12h-job… (@ 30mm/s, Jerk 50mm/s)
This print took 10:52. Kisslicer said something about 11:35, as old Schorsch always took a little longer i am surprised that new Schorsch is a bit faster than Kisslicer thinks.
Ok, Schorsch can print @ 220 mm/s and up. But since even PLA quits at these speeds the last layers of this gear are printed at 40mm/s… The first and the middle part of that gear were printed with 100 – 220 mm/s (first layer ~20mm/s) to see how it works. You can’t really call it ‘printing’ since straight ‘printing’- moves look like normal rapid moves. The result is fightening ugly. I don’t think it is a good idea to print at those speeds. But it’s nice to know that Schorsch could.
Dear world, i did it! I finally did it! I redesigned my printer. Today it printed it’s first things. Straight things, round things, 100% filled things. Now a case.
To be honest, i kept the old four-corners-four-motors-Z-axis… I just wanted to see new Schorsch printing! And how he does…
But of course i ran into some struggles: Broken wires stopped the heatbed, the temporary magnet for the X-endswitch damaged the switch causing Schorsch to grind madly in the corner and finally loosing the A-line. While dealing with that i figured out that it is a good idea to move the head free with my hands to feel if there is a problem with the lines. If it misses one bearing it is much harder to move – prints start normal but at some rapid move it will loose many steps – and makes you a nice piece of crab. When both lines are jumped off – well, i din’t know.
For today’s over-night-print i reduced Schorsch’s speed to 350mm/s @ 10000mm/s² printing @38mm/s. I noticed the motors lost steps when heated +50°C. Maybe i reduce the current a little. 500mm/s schouldn’t be a problem with only one Hotend.
Old Schorsch is now part of new Schorsch. New PSUs wait to replace the old chinese 1150W PSU on the right and the 15V for the heatbed. As you can see i am still stuck with 200x200mm²… enough to print its new Z.
btw. I removed the door of the nightstand because it was too loud.
That’s right! New Schorsch is a 60’s nightstand that will leave future archaeologists clueless. The final dimensions are 345 x 205mm². An idea with consequences that kept me awake too long yesterday was to place the Y-endstop at Ymax – only the bugfixed RC of the actual (dec 2015) marlin firmware can handle that with coreXY enabled. The other branches kept Y useless after hitting Ymax…
While researching that problem i found a lot of people using or building coreXY-based printers – yeah! Some of them even use fishing-line! Strike! Now i’ll wait for more old-furniture-printers…
Ol’ SchorschXY is printing the last parts (not shown for obvs. reasons) right now. But here’s how the most visible parts look like. They work realllly smooth.
The last months i spent (half) my time at Bauhaus-University Weimar and haven’t done that much Schorsch but using it. That time is over now. New Schorsch is more accurate for big prints and uses std. BBs to get rid of the LM8UUs old Schorsch uses. X and Y are assembled and wait to be mounted to the housing. A very nice housing. Z isn’t build jet.