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General discussions. For specific printers / electronics / fabrication methods / softwares, please see other sections.
Re: talk to duet from a 2nd micro-controller? - 6 years ago
I've successfully sent gcodes through the paneldue port make things happen. However, I'm having problems reading responses like M408 or M105; I get no chars, except under conditions I have yet to determine. It seems like there is a control issue between the commands I send to the paneldue port, and commands from the web interface. at some point I can't connect anymore from the webpage. can you eby shadowphile - Duet
talk to duet from a 2nd micro-controller? - 6 years ago
Hi. I am using Arduino board in my delta for miscellaneous functions like indicators, panic buttons, or jog controls, maybe a Home button.. These will be tied to the hardware buttons on a panel I printed out. I want to use those buttons to send Gcode from the Arduino to the Duet. I can't tell from the schematics if there is even a port other than the USB. Is it possible to (easily) send commanby shadowphile - Duet
how is duet auto leveling calculated? - 6 years ago
I've just finished V3 of my new large Delta with heavier 20x40 towers and massive water-jet cut metal bed, 10mm diameter rod arms with mag-ball joints, etc. Lots of other cool refinements for ease of use and precision. It's working fantastic, zero skew and spot-on dimensions with no adjustments required! Hard to believe actuallly.... I'm still using my old spring-loaded optical-switch z-probe andby shadowphile - Firmware - mainstream and related support
Re: ball-cap rod-end concept pros and cons - 6 years ago
Sounds good, I can see buying modular pieces. It seems to have a limited strength though. I'm designing version three of my delta to carry multiple extruders and swappable with other types of hot-ends so the entire frame is getting thicker parts which will load the joints more when trying to go fast. I can't seem to avoid designing away from light airy printers that can move really fast.by shadowphile - Delta Machines
Re: algorithm to speed up prints? - 6 years ago
You're reply is partially correct but still does not address WHY there a limitations to the current approach of flowing plastic through a heater block. Please be patient while I try to explain some of the physics that causes these limitations. I will exaggerate some things to make the issues more clear. This is pretty long because I am trying to explain the thermal physics without using any equaby shadowphile - Firmware - mainstream and related support
Re: ball-cap rod-end concept pros and cons - 6 years ago
I checked the Zatsit site and it seems like a great novel approach. One thing about 3D printing that fascinates me is how fertile it is for innovation. Like the very early days of computers. My only complaint about the Hylite material is that it's no good for us without access to a precision 2D router table. Buying that service would get expensive and any time I need to make a small part I caby shadowphile - Delta Machines
Re: algorithm to speed up prints? - 6 years ago
"For some reason 3D Printers can not print faster than the Hot-end can heat filament!!!" Isn't this rather obvious? If the filament isn't molten, how can it keep extruding? Or was that sarcasm? (edit: the actual limitation is the low thermal conductivity of the plastic itself. The Volcano doesn't have any higher wattage, it just extends the time the plastic is given to melt before it is pushedby shadowphile - Firmware - mainstream and related support
algorithm to speed up prints? - 6 years ago
This works by modeling the dynamics of your printer to compensate for deflections and vibrations. (which I've always wondered how feasible) Is this something of interest for the future of the Duet firmware? The article mentions it could done in the firmware (probably HAS to be at that level given the bandwidth requirements for physical vibrations can be awfully high) linkby shadowphile - Firmware - mainstream and related support
Re: ball-cap rod-end concept pros and cons - 6 years ago
Hi warbunniex. I've been using the Trick Laser parts for a while. As expected they have great zero-backlash so the performance has been good. Some things I have learned though: -The springs required to pull the arm-ends together can get in the way of the either the carriages or the effector, depends on your designs. I like the springs in general for disassembly but their presence is really a coby shadowphile - Delta Machines
Re: basic protocol for using baby-stepping? - 6 years ago
I'm not sure what that has to do with baby-stepping. Here is my routine before every print job unless I'm going directly from one print to the next. 1) Get it all heated up. 2) Perform a set of G30s for the autoleveling. (at some point in the past i manually determined the tilt errrors to get the H values). 3) Go to Z1 then drop manually until just grazing a piece of paper. If I'm printing beloby shadowphile - Duet
basic protocol for using baby-stepping? - 6 years ago
Upon reading around it seems to be a more real-time version of G92, or least a relative version of it. I'm interested because normally I zero the z axis with G92 after touching down on a piece of paper but lose that if it gets homed. I've played with the baby-stepping and it's operation is obvious. The advantage, at least in the latest version of firmware, is that baby-stepping will be retained eby shadowphile - Duet
Re: print froze halfway up - 6 years ago
yes, it seems to use the z in the last move command as the height, but ending with ;E didn't change that. I'm trying to not home after a print because I then lose my manual tweaked offset if I want to just run another part right away. This is the last chunk of code: G1 Z8.150 F9600.000 M107 M104 S0 ; turn off temperature ;G28 X0 ; home X axis ;M84 ; disable motors G0 F5000 Z300 ;Eby shadowphile - Duet
Re: print froze halfway up - 6 years ago
maybe. in the past it stopped at exactly the same spot when I ran the job again. could be a bad spot in the memory I suppose. i can't test until I finish this current run which will take all day. the other long-running thing bugging me is how uploaded models are displayed during print, maybe due to limitations of Slic3r? Right now I'm printing a large file, here are the status values: -says thby shadowphile - Duet
print froze halfway up - 6 years ago
I have duet ethernet and using slic3r 1.2.9. Gcode analyzer online says the correct height but model info in the web interface says about where the print stopped in reality. Specifically, the web interface status line said the print was 100% done WAY early, like a dozen layers in. It still continued to graph printing layers until it froze with the nozzle at temperature all night with the point bby shadowphile - Duet
Re: skewed prints: scaling or offset (or both) - 6 years ago
Thanks David. Do you know how to easily create a one-path pattern? I attempt to make a wire-frame with wire widths just larger than the extrusion width HOPING the slicer will fit just one path everywhere but that is really clunky and I'm not able to make this work today at all. Or am stuck doing the entire g-code file by hand? That will require a bunch of trial and error This would be a reallby shadowphile - Delta Machines
skewed prints: scaling or offset (or both) - 6 years ago
I have a hollow test square 100mm wide with 5mm thick walls (2mm high) My machine is pretty straight, metal corners, best I can do mechanically. I have duet ethernet and run the autocal ok, I also measured the H parameters. My overall dimensions are 101.7 (should be 100), but the 5mm wide walls measure 5.4. To get something like this would require both a scale and an offset error (y=mx+b of coursby shadowphile - Delta Machines
Re: has my Duet Ethernet died? - 6 years ago
Oh, the instructions need updating. they say 1.18.by shadowphile - Delta Machines
Re: has my Duet Ethernet died? - 6 years ago
It worked, thanks a lot. I forgot that I had never upgraded firmware on a duet ethernet (ie not .85)by shadowphile - Delta Machines
Re: has my Duet Ethernet died? - 6 years ago
Is that bossa 1.8? The Shumatech site only provides back to 1.3.by shadowphile - Delta Machines
has my Duet Ethernet died? - 6 years ago
I changed extruders on my delta and was successfully recalibrating the extruder motor when suddenly the machine would not home anymore, just whine. Microstepping, max accel, jerk, max current settings all the same as before. All kinds of rebooting activity helped not at all. I decided to reinstall the firmware and after doing the big erase the device manager shows a 'AT91 USB to Serial Converteby shadowphile - Delta Machines
Re: printing small nylon features with a large delta? - 7 years ago
The 90 deg F in my bin is very long-term storage of everything. PLA starts warping if I go much higher. I did try drying the 910 filament for 4 hours last night at about 200 F (just below the glass-transition point). At rare moments there might be a crackle but otherwise it flowed smoothly. We will see how it performs after sitting back in my dryer/storage box for several days where it mightby shadowphile - Delta Machines
printing small nylon features with a large delta? - 7 years ago
I've been playing with Taulman 910 Alloy and discovered that it still has too much water (makes steam puffs, snapping sounds, frothy or bubbly extrude) even after sitting in my drying bin for 24 hours. My bin is powered with a 75 watt heater and sits at about 90 deg F and 22% humidity. (if it was insulated I could probably drop that wattage lower to save electricity) I have not discovered yet whby shadowphile - Delta Machines
Re: how to select the best cooling fan for my delta - 7 years ago
Just for comparison I just bought a 30mm blower for $8 on Amazon. It is 3.2 CFM @ 12V. Since I'm only buying one or two and trying to make a really competent machine the price does not seem like that much to me. Except for the bottom layers I tend to just keep my fans at 100% but they sit blowing across the bed from all sides, which won't do squat for print heights beyond 100mm or so (mine goesby shadowphile - Delta Machines
Re: how to select the best cooling fan for my delta - 7 years ago
@Origamib Thanks for your thoughts. I've been using Slicer since I know it fairly well and the two times I tried Cura it immediately drove the nozzle into the bed, sigh. Guess I should bite the bullet and start re-learning something else. There seem to be more and more options today. I've heard good things about S3D but of course 3D printing is an open-source world (or was) so paying a fairlyby shadowphile - Delta Machines
how to select the best cooling fan for my delta - 7 years ago
I came across a home experiment that measured the effectiveness of different shrouds and fans on PLA overhangs here and the result definitely favored a 50mm blower vs a 40mm fan. Now with a shroud to focus the airflow, the back-pressure will be high. Most of these little computer fans are made to blow freely. I made a shroud with a 30mm fan and had almost no airflow out the shroud nozzle. I fby shadowphile - Delta Machines
Re: trying to refine my print results - 7 years ago
Thanks, here is the file. BTW, this is a cutout from a much bigger calibration plate, and that had better results although not as good as I wish. I tried to use the auto-cooling features in Slic3r that slow down prints below a certain layer time but it didn't seem to take. Also, I have three fans around the bed blowing toward the center but nothing focused closeup around the nozzle and it definby shadowphile - Delta Machines
trying to refine my print results - 7 years ago
I wasn't sure if this was the right forum but deltas do have their unique print quality issues so here I am. My printer details are below. The picture is of a part in PLA, 250 um layers at 30 mm/sec, 400 um nozzle. The walls and flats are superb but the larger columns are doing weird stuff. I've tweaked the pressure advance (usually use 0.1; this picture is 0.2; 0.3 got worse again) and that helpby shadowphile - Delta Machines
best oversized extrusions from Robotdigg? - 7 years ago
Right now I have 20x20 extrusions in my 1meter tall/300mm bed delta with metal Robotdigg corners. Even with an all-metal frame the twist factor is not very stiff. When I made this machine they were not available but now I see several metal-corner options for thicker towers. The question is...which is better for me? The 30x30s seem like they would be the best: 900 cm^2 cross-section vs 800 cm^2by shadowphile - Delta Machines
Re: ball-cap rod-end concept pros and cons - 7 years ago
thanks for the input. I still have a conceptual problem with the magnets. They get weaker as you pull away vs springs that get stronger as they stretch. The later sounds more shock resistant.by shadowphile - Delta Machines
Re: question to DC42 about H parameter in auto-leveling deltas. - 7 years ago
thanks David, I agree with everything you said! Maybe I don't quite understand HOW those corrections are used. I'm just trying to make sure that when I probe a point (G30 S-1) after an auto-cal and it reports a height that it matches the physical height I would get if I measured manually. thanksby shadowphile - Delta Machines