You'd have to design each part in such way, that there are always even numbers of perimeters. Or the extrusion width has to vary to make it even. Not the way to go.by o_lampe - Slic3r
Interesting design! On first glance, I see the weakest point in the leadscrew nuts. They are too short and any wear in the thread would lead to binding ( on the screw or the slides )by o_lampe - General
Doublesided tape for carpets worked for me too, but I don't print ABS often. Bed temps usually below 60°Cby o_lampe - General
Just made a video of the Cloverleaf drive. It's running a long test now to test for slipping or wear of the rubber tube. Here's a closeup of the stepper.by o_lampe - Extruded Aluminum Frames
The material in the pic is silicone tube, but it's too soft. I try rubber tube now, but need a long run to confirm. A sandblasted aluminum idler pulley would be next on the list. The pulleys are offset by M3 washers. The cable hasn't given me any headache yet, it's a 0.5mm Aramid fishing line. I have a mocked up bed frame running with 1.3mm PP-cable for the parallel bars. That cable it too stretby o_lampe - Extruded Aluminum Frames
The only firmware for rotational Deltas is RepRapFirmware ( RRF ) . It runs on Duet boards from Duet3D.by o_lampe - Delta Machines
It'll be THE eyecatcher on the Makerfair! Would you say NEMA 17 would've worked too at these speeds?by o_lampe - CoreXY Machines
Cutting paper would require enclosure and nitrogen athmosphere, right?by o_lampe - Laser Cutter Working Group
QuoteBut you are probably building rotational delta (based on your previous post). I suggested using nautilus gears to increase torque when needed. I'd be interested, if these would also make the kinematics linear like I said?by o_lampe - Delta Machines
Looks like your nozzle is overshooting in the corners. Does it wiggle? Reduce acceleration and jerk until it get's better.by o_lampe - Printing
I bet, every big city in China has those mountains of bikes. Now they start driving cars instead...Imagine how this scrap yard will look in ten years! I used to work in bike service business and within 12 month I collected dozends of 'damaged' e-bike batteries. Usually, there was only one cell broken or the wiring/BMS failed. With these 2nd hand batteries you could build a range extender for anby o_lampe - green talk
Maybe it's room temperature changing the probing result? I always print three perimeters of skirt around the part, to see if the nozzle distance is good. If it's wrong height, but evenly all around, I use 'babystepping' to correct height. If the skirt is uneven, I have to cancel the print, wait until the bed is cooled down and start again.by o_lampe - General
Awesome! those small features would be difficult with FDM printers. Cutting paper with a diode laser would be easy enough, but how about a fibre laser? What's the biggest useful area for them? They'd be much faster I guess. How much would it cost?by o_lampe - Laser Cutter Working Group
A few years back I had the idea to improve solar panels efficiency with nano-lenses. IMHO most of the photons 'miss' their target in a silicon-wafer and only increase temperature. If it's possible to focus the photons 'to the right place' in the silicon molecule-grid, we'd see increased efficiency over a wider temp-range. Thought it was worth mentioning it here, since we have a Nanotec-expert oby o_lampe - green talk
Laser_paper_resin printer It's not a real project yet, more like a research for filament-alternatives.by o_lampe - green talk
I know there were 3d parts made of stacked paper before, probably cut by laser plotters? Did they use resin in a vacuum chamber to fix it? I'm just asking, because I could get rolls of recycled paper for a few bucks. Each roll has ~100m of paper on it and the width is around 1 meter.by o_lampe - Laser Cutter Working Group
I wanted to build a test rig for my cloverleaf cable drive. A simple weightlifting platform. I only had nine 2020 extrusion, 300mm long to play with. Not enough to build a cube and a bed frame. So I started to minimize extrusion count and came up with this: The single linear rail will lift the 'U'-shaped bed frame. The bed frame will be stabilized by 'parallel bar' cables. I believe, the extraby o_lampe - Extruded Aluminum Frames
QuoteMechaBits I wish they would Ban Fishing, not at the individual level with a line or spear, just the commercial side, you want fish for tea you have to go get one. Tell it to the people of Iceland and Japan, they wanted to go Whale-hunting again.by o_lampe - green talk
It depends on your hardware/firmware. But generally you connect your printer to a host program ( pronterface, repetier host etc. ) and send the PID command while the hotend is cold. E.g. Marlin will process the PID tuning and return the new values. Then you have to store these new values in Eeprom. The gcode-wiki I linked you, has a few more commands regarding PID ( see M130 ff).by o_lampe - General
Quoteretrosenator Quoteo_lampe The hotend sock will help a lot. Also take care, the part cooling fan doesn't blow on the nozzle. What type of hotend is best? do the j-head really use ceramics instead of metal to prevent heat from rising out of the nozzel? If so, does this improve efficiency significantly? I haven't used j-heads, but AFAIK they use a high temp plastic instead of E3Ds heatbrakeby o_lampe - General
Sometimes the two coils of the steppers have different wire colors or the order of connection is wrong. Usually black/green and red/blue are the coil pairs. The order to connect them is black, green, blue, red or vice versa if the motor runs the wrong way.by o_lampe - Printing
QuoteVDX ... yes, there are some of this sort of "extreme think-tank ideas" around, which deals with "necessary mass extermination" -- but have they ever seen themselves (or their relatives) among the 99.99% victims Right now Darwin's law does not work for mankind. Only the rich survive, is more like it. A catastrophy like mentioned above would change that. Only people who can care for themsby o_lampe - green talk
Maybe a 'nautilus gear' system will help? It will change the torque from low at the beginning to high, when the levers raise. It also changes the kinematics from 'polar' to linear.by o_lampe - Delta Machines
They seem to have wrapped so many turns on the pulley, the whole motion is done by the 2nd layer of cable. At least they avoid the problem of accidently overlapping cables.by o_lampe - Mechanics
QuoteEverlasting LightBulbs & all that other tech they hide because they cant milk us with it, ... an end to Planned Obsolescence. That's why I said, we'll need a global green revolution. But only, if we find a different way of living away from capitalism. Like that will ever happen... If you want to save live on the planet, wipe off mankind from it's surface. Or at least, reduce it to aby o_lampe - green talk
You've already listed a few valid things. The hotend sock will help a lot. Also take care, the part cooling fan doesn't blow on the nozzle. Small stepper motors, like 0.4A NEMA 17. It works, as long as the extruder motor is strong enough ( geared 3:1 or 5:1 ) you can print at 50mm/s reliable. It's all about finding a reasonable acceleration for them and you can use travel speeds of 120-150mm/s.by o_lampe - General
You changed the whole hotend and you might have a different heater now. I think, you only have to run a PID tuning for the hotend and the temp-error will be gone. Because of the new nozzle, you might also have to adjust z-height ( sensor height ) again. Quote1) smash the printer on the ground, again and again, till it becomes dust. Seriously. If you still want to do this, don't forget to take aby o_lampe - General
Have to tried to print it sideways with a brim? You could also try to reduce extrusion ratio, because it looks like the nozzle scratches across the previous print.by o_lampe - Printing
You are setting extruder temp for tool 2 but later change to tool 0?!by o_lampe - Printing
The host-PC /slicer could deal with real motion data if it has an exact model of the printer. But homing distance and bed levelling are 'live' values most of the time. Also the Gcode is kept general to slice a part for different printers.by o_lampe - General