What kind of accuracy/layer height would be required?by Andrew Diehl - Wanted
1) Yes, for a given path the order the coils are triggered should remain the same, just at a different timing. 2) Yes 3) Yes (if the torque required to accelerate at a high rate is not supplied by the motor the motor misses steps) 4) Unsure, but don't think so. 5) Unsure, but I think power is required for fast breaking. 6) The extruder would only over overtake axis movement if the x/y axis areby Andrew Diehl - General
^Right. It decelerates enough so the X/Y components of the dV are equal to the jerk value. That way you don't come to a complete stop at every single line segment, but you are slow enough that machine compliance can round the corner enough without skipping steps.by Andrew Diehl - General
I'm not sure there are any inherent problems with the current drive system other than weight or ooze (your pick!) Honestly, I think he is vastly over-promising. I see things which will work fine with a pen, but will not hold up to produce fast or high quality prints.by Andrew Diehl - General
Acetone is basically harmless to humans. However, it is very flammable, and should not be used in large quantities and in confined unventilated spaces. Our body naturally produces small amounts of it, and surprisingly large amounts can be found in cheap liquor.by Andrew Diehl - Printing
Nobody knows yet as far as I can tell. However, the technology used in the TOM is quite outdated at this point, and I would have to recommend a machine based on better electronics/mechanics.by Andrew Diehl - General
Lower your acceleration and/or jerk values and/or print slower. Report back.by Andrew Diehl - General
Probably abuse then, which means ABS or PLA gears will work about as well as the originals until somebody does something mean to it.by Andrew Diehl - General
The only materials we are comfortable printing with right now are ABS and PLA. I'm not entirely sure of the scale of the drawing, but it would probably work for a while. Did the original gears wear out or did some object (like a paperclip) go through the shredder and strip the gears?by Andrew Diehl - General
looks like your printer lost some steps. Does it do the exact same thing if you do it again?by Andrew Diehl - General
lower the speed, and/or try to decrease the first layer height some more.by Andrew Diehl - Printing
There are currently no 'real' heated chambers in reprap that I know of, and Nylon has dismal warping using current practices used for ABS and PLA. I think Polycarb is the next material step the community will take, since it has more similar printing properties to ABS.by Andrew Diehl - General
A few important things to note: Material used to come in coils (no spool cost, no labor cost for putting it on a spool) Also, the demand for quality filament has been increasing since the filament quality now makes a noticeable difference in print quality (because our machines are better) Not to mention the prices of just about every corn/oil derived product are increasing. I think the supplby Andrew Diehl - General
99% of parts you are capable of printing decently will fit within 8x8, and 90% will fit within 6x6.by Andrew Diehl - General
Um, McMaster is HUGE and many, many people do business with them online without issue.by Andrew Diehl - General
If it had small teeth the infill will also likely not fill them out so it will not be very strong. Very dependent on the printer/part though.by Andrew Diehl - General
Your parts are cooling off to quickly and probably not being extruded hot enough (possibly because you are printing too quickly and the extruded filament does not actually get up to the temp the head is at) Use of a full eight skirt will help. Do NOT have any kind of fan blowing on the part.by Andrew Diehl - General
Well, the 3d touch and the $1700 (i'm assuming rapman) are completely different calibers of printer. If you watch their videos, the BFB printers get nice finishes mostly by going slowly. I'm not sure what the actual head travel rate is though. A lot of repraps can do similar quality if they take their time. It seems most reprappers are trying to be speed demons these days, but the quality impby Andrew Diehl - Wanted
Most 3d printers around these days have far better positioning accuracy than .005in, reprap or otherwise. None of them will actually make big parts which do not have some type of warping out of that 0.005". It's very part dependent. What are your other required specs/intended uses?by Andrew Diehl - Wanted
Just ask if you can send that spool back to them. PLA should not be brittle, especially if your other roll is fine.by Andrew Diehl - General
Other than the support changing directions (which will be fixed soon) it looks fine to me. I'm kinda grasping at straws here now. Maybe post some screen shots of the first few problem layer paths?by Andrew Diehl - Experimental
Well, under extruders you don't have the mm per revolution of the extruder set. That will impact your max feed rate settings I believe. Still looking, likely more suggestions to come.by Andrew Diehl - Experimental
Can you also post you .ini files please? (sorry I called them config by accident before) So far it seems to have worked fine with my settings. 280 rpm seems really high. What kind of extruder do you have on your tom? The gcode you sent before had the layer speed reduction taking effect, which is probably why you aren't noticing the speed slider working.by Andrew Diehl - Experimental
Please attach the .stl and your config files. I'll try to reproduce on my end.by Andrew Diehl - Experimental
Whisper quiet at 2.5m/s^2. Can run up to 6m/s^2 but short fills hit a resonance causing skips. Anyway, 20 and 300mm/s^2 of acceleration take 5mm and 10mm to come up to speed for 20 and 80mm/s printing, which is a lot. The old Tom's were never really meant to take 80mm/s, and to be honest the fill quality suffers on my machine at that speed. I'd try and keep things 20/40mm/s if not a little sloby Andrew Diehl - Experimental
I'm very skeptical it will work the same. The pressures involved in extruding filament at speed are very high compared to the paste test, and flow tends to not scale intuitively (reynolds number, anyone?)by Andrew Diehl - Plastic Extruder Working Group
Carbide tipped blade and a fair bit of cutting oil makes it cut like wood. Just don't forget the eye/ear protection because the chips are fast/hot and it will be loud.by Andrew Diehl - Extruded Aluminum Frames
Hi Sun, While some of the firmwares allow on the fly acceleration changes, they were never really meant to be adjusted automatically withing a print. The intention was to be able to easily calibrate the machine's max acceleration without having to constantly re-upload the firmware if an acceleration proved too extreme. In my experience, the highest acceleration your machine can handle reliablyby Andrew Diehl - Experimental
The slicer should have nothing to do with acceleration. The firmware should do that automatically with whatever g-code it receives.by Andrew Diehl - Experimental
Nope. Never got it to work. Even if it did i don't think the buffer would have been big enough to be useful.by Andrew Diehl - Firmware - experimental, borrowed, and future