Reminds me of Kevin Costners 'Waterworld'. ...not the place they wanted to be and everyone was dreaming of 'Dryland'.by o_lampe - green talk
I wonder if it's a slicer problem or caused by your Z-axis? Is it a matter of microstepping and mismatched layer height? Have you tried to increase stepper current?by o_lampe - Slic3r
A screenshot of Slic3rs retraction setup would be helpful. Maybe you've set 'extra length to restart ' to 3mm?by o_lampe - Duet
That's awesome stuff. I wonder how stable those structures are?by o_lampe - Plastic Extruder Working Group
I have played a lot with these 28BYJ motors and their problem is the inbuilt slip clutch and a little backlash in the gears. So don't expect 'absolute' values. If you modify them, they can be driven like bipolar steppers and RepRapFirmware ( and others? ) are even able to autotune the bed level. I never tried it, but others did. I played with 2W blue Diode lasers and they cut 3-5mm deep into Balby o_lampe - Mechanics
3-4A stepper drivers are neat, but will there be closed-loop steppers or external encoders as 'smart tools'?by o_lampe - Duet
I would make a solid profile and set the infill to a low value. But with a single perimeter you have to be lucky, that the slicer can draw the track without retraction(s). You can also try to print it in 'vase' mode.by o_lampe - Slic3r
Just saw a report about a new plastic made from chicken feathers. The source is cheap and would usually be burnt. A win_win for our planet.by o_lampe - green talk
I know that you can generate emoticons from selfies, but how about a Monster-frown? With such a picture ( eg. from your mother_in_law ) you could make 3D stencil for customises pumpkins and such...by o_lampe - Reprappers
I believe the guys of the 'hangprinter' project are using similar 'mechaduino' drivers. But they seem to have delivery problems. Some parts of their BOM aren't available IIRC.by o_lampe - Delta Machines
QuoteHere I also remember the "promises" of the nuclear industry with "low-level radioactive waste" poured into glass, which could be "safely" packed away for thousands of years - during a guided tour through the first German experimental reactor in Kahl (my neighbour's town) I got an eraser with a (non-radioactive!) black "glass cookie" inserted into a well, with which they wanted to demonstrateby o_lampe - green talk
The NEMA17 pancake with 13Ncm weights 140gr according to OMC-online. Same weight as a NEMA14 with 12.5Ncm. ( without gearbox ) It is much lighter than the standard direct drive of my Prusa i3. ( ~350gram less ) I found an interesting datasheet for it, which indicates that almost full torque is available from ~75RPM to 525RPM. Spinning slower than 75RPM is a real 'downer'. I also have a NEMA14 pby o_lampe - General
QuoteMechaBits Sorry if I missed them in other threads (o_lampe), but what did prints look like, how often you use it, on what kind of parts. Unfortunately the extruder to make the filament is on the same printer as the 0.8-extruder itself. I ran out off filament and would have to refit the Make-extruder again. There was no big interest in the subject back then, so I didn't print much more thanby o_lampe - General
QuoteMKSA Anyway, buckling becomes the real killer and one has to reduce the distance from hobbgear to melt zone. This is why I don't like the E3D kind of attachment, heatbreak and heatsink that became the standard and made my own far shorter. Here is my direct extruder. The filament path can't be much shorter. It's driven by a 1A/13Ncm NEMA17 pancake. ( forgot the exact weight ) The 28BYJ you miby o_lampe - General
What, if I replace one of the parallel bar pulleys with an encoder wheel? Slip wouldn't be a problem with a closed loop stepper driver. ( here we go again ) Something like the mechaduinos? Surely the resolution wouldn't be good enough. Maybe, if I fit it on the idler pulley? That would also work for the XY-gantry.by o_lampe - Extruded Aluminum Frames
That's why I chose 0.8mm filament. It matches 1mm ID Teflon tube. I was lucky to get a tube with 2mm OD. It fits inside the normal PTFE-heatbrakes. It also needs proper guidance between gear and heatbrake to avoid spaghetti. IMHO the chamber pressure can be much lower, since the cross-section of 0.8mm filament is so much smaller than 1.75 or even 3mm. I had no problem with 1st. layer adhesion, bby o_lampe - General
QuoteNo clue why you want it and I do not consider it a good feature anyway. It makes perfect sense for a pick and place machine. You could try to set max. Z-speed to a low level. That way vertical_only moves would be fast, but the picking move ( lowering Z ) is as slow as Z. Don't go slower than the conveyor belt speed, otherwise the bottles will escapeby o_lampe - Delta Machines
Does simplify3D have a 'wipe tower' option? Or does it allow to print the skirt the same height than the part? ( prime tower and wipe tower combo ) If not, give slic3r a try.by o_lampe - Printing
You can't call yourself 'environmental friendly' and then sell this crap to others! 1to of brown coal produces 1to of CO2. Plus the polution to transport it to Australia or China. It's like Switzerland would start exporting weapons of mass destruction...by o_lampe - green talk
Some crazy ideas for brain food: Put it on a wheelchair and let it open doors and such. Needs joystick control Make it work as a Chess-bot. Put it on your bar to serve icecubes. Cool party gimmick.by o_lampe - General
Quoteuticatechclub Quoteo_lampe Quoteuticatechclub Could it be also true, that reducing existing drive gear by the same ratio achieved by reducing 1.75 mm filament to 0.8 mm filament would be good enough? Am I over simplifying? I don't understand what do you mean with reducing the gear? I mean making it smaller proportional to how much smaller in diameter the new filament became. A finer pitcby o_lampe - General
QuoteJoergS5 It would be interesting to produce thinner filament on-the-fly from 1.75 mm or 3 mm filament, i.e. remelt into thinner filament before it moves into the hotend. This remelt should be done protected from oxygen. That was partly my 1st. idea, but pushing still hot filament through a Bowden tube is a no_go.by o_lampe - General
It's just a local German problem and not directly related to 'plastic polution', but the plans of RWE to lumber Hambacher Forst, just to get more area for brown coal surface mining is pi$$ing me off ATM. It is the biggest hole on earth already and they want to increase it although they don't need that coal in the near future.by o_lampe - green talk
Quoteuticatechclub Could it be also true, that reducing existing drive gear by the same ratio achieved by reducing 1.75 mm filament to 0.8 mm filament would be good enough? Am I over simplifying? I don't understand what do you mean with reducing the gear?by o_lampe - General
QuoteMKSA The motor power required is mainly a function of the extrusion flow. If you reduce the filament diam., you will have to run at a higher speed to keep the same flow ! I'm not good at math, but I doubt that. I agree that melting power is proportional to extrusion flow, but from my experiments I've learned that the filament diameter has a significant impact on required motor power. The tby o_lampe - General
The servos will draw a lot of current, especially digital servos. I'm not sure, if the 22guage is even capable of driving one servo... If you can, measure the voltage drop acoss the GND wire. If it's to big, it might trigger endstop pins unvoluntary when their GND is connected. Or they don't trigger at all, when configured 'active low'.by o_lampe - RAMPS Electronics
Making the center pulley bigger is probably the answer, since double-wrapping didn't work. Adding a second set of idlers would make the whole cable much longer, which counters the lower stretch ratio vs. belt. I also need a better bottom idler, it limits the max. tension now.by o_lampe - Extruded Aluminum Frames
It depends on the colors you want to mix? RGB mixing tables are out there as well as CYM. The real colors are often a bit 'off', so the results may vary. Deckingman made an interesting calculation, how good or bad extreme mixing ratios work. (99% vs 1% = no way )by o_lampe - Printing
I made my own 0.8mm filament and modified a 0.4mm nozzle with a brass insert. It works quire well with a pancake Nema 17 stepper, but the drive gear teeth bit too deep and I had to experiment with other gears. It also tends to jam when the filament guide isn't perfect.by o_lampe - General
It's either the Ramps_test firmware or slipping, but the bed frame looses position constanly. I thought of wrapping the cable twice around the stepper shaft before wrapping around the next idler pulley. Have to add washers to increase offset. Also have to write a code, that moves xx# steps up and down instead of the timed approach in Ramps_test.by o_lampe - Extruded Aluminum Frames