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Printing issues ...
Re: Trying to generate 1khz sine wave at 2A - 8 years ago
If you have an amp, just put a sine.wav on a portable audio player. Is that not portable enough?by n8bot - General
Re: Need advice on PEI sheets - 8 years ago
I trust reputable businesses. Sabic, the maker of Ultem, also makex Lexan, among other plastics. You may have heard of them. They have a reputation to withhold. As well, your products are targeted at $200 machines. None of them are useful on industrial grade 3D printers. So, who are your customers again?by n8bot - General
Re: Need advice on PEI sheets - 8 years ago
See, that's the thing -- most of us in this community are here to do things other than "business." Your primary goal here seems to be to make money off of new 3D printing users.by n8bot - General
Re: Need advice on PEI sheets - 8 years ago
It's not that I cannot afford your products, it's that I don't feel they are worth what you are asking for them. Your only success seems to be selling to people with very little experience in the 3D printing world. You are right that Ultem is a proprietary blend of PEI, but I think that other companies do manufacture PEI. Also, proprietary is not a strong enough word for your PrintBite product.by n8bot - General
Re: Need advice on PEI sheets - 8 years ago
I seriously doubt Printbite works as well as PEI. Send me a sheet and I'll prove it. Of course, it would probably take me a month to get one... Can we just have ONE thread that doesn't come back to pimping Mutley3D's proprietary products?by n8bot - General
Re: Need advice on PEI sheets - 8 years ago
I've had good success with TPU on PEI. It does stick (a little bit too) well, but is manageable and the surface can be cleaned fine. It is possible and practical to print TPU onto PEI, as long as you expect it to be attached fairly well. The flexible and strong nature of TPU lends itself to being removed with brute force without significant risk of damage to print or print surface.by n8bot - General
Re: Trying to generate 1khz sine wave at 2A - 8 years ago
Audacity can likely produce the 1khz sine wave for you, too.by n8bot - General
Re: Need advice on PEI sheets - 8 years ago
The PrintBite seems to have an advantage with Nylon, and other high temp materials, but I'm not sure if that's really the case or marketing fluff and misinformation provided from inexperienced users. Most "serious" DIY 3d printer builders I know use PEI, but I could see a use for PrintBite if you ONLY printed Nylon. I still have my doubts how well it holds onto REAL nylon, and not the easy to priby n8bot - General
Re: Need advice on PEI sheets - 8 years ago
PEI is durable as all hell. You NEVER have to replace the PEI. What koolaid have you consumed?by n8bot - General
Re: 0.8.5 can't change MAC address - 8 years ago
Unfortunately the board is no longer in my possession. Which aspects were you curious about? I know pretty well what was in it, so I can provide that to you. I tried several things from DHCP, to assigning a static IP, etc. I came to the conclusion (after making this post last night) that the SD card might not be getting read properly. The suspect duet has never been used, so we have had no way tby n8bot - Duet
0.8.5 can't change MAC address - 8 years ago
I'm trying to troubleshoot someone's 0.8.5 that they couldn't get to see on their network. I have it hooked up to my network, and I have changed the MAC address in config.g, but it seemingly doesn't take effect. When it connects, it messes up the IP address for my other duet (that has the default beefdeadfeed mac). When I disconnect my duet that works, connect the problem duet, it shows up with aby n8bot - Duet
Re: Need advice on PEI sheets - 8 years ago
Definitely unfilled, from what I know. It is what most people use; Ultem 1000.by n8bot - General
Re: PLA isn't sticking to PEI. - 8 years ago
I've noticed PEI takes on greasy fingerprints and doesn't let go, even after cleaning with solvents. Use sandpaper. I use 600 or 800 grit. It leaves a nice matte finish and really cleans all the crap off the bed. Don't ever touch the bed with your fingers if you can avoid it (especially if they're greasy). PLA should stick to the clean PEI at any speed with a surface temperature around 60 degreeby n8bot - Printing
Re: Discussion on the Nimble - 8 years ago
When it comes to comparing volumetric flow of a fluid, why are you choosing to cite the "surface area" of an opening? More important is volume of the shroud; more important still is the non-turbulent flow of the fluid through the shroud, and the geometry of the fluid path itself.by n8bot - General
Re: My problem is your opportunity. - 8 years ago
The name is digital ghost, not post. Third time's a charm.by n8bot - General
Re: What CAD software? POLL - 8 years ago
It isn't jumping through hoops if you intend on using FreeCad. If, however, you want to use an Openscad design in any other Cad software, getting freecad just for this purpose is jumping through hoops. Maybe hoop, singular...by n8bot - General
Re: What CAD software? POLL - 8 years ago
That is a very nice use of the software, yes. I think you could fairly easily achieve the same results in a number of CAD packages. You could even port that script to be a Fusion 360 add-on, so you could take advantage of all the other useful features that Fusion 360 offers: Simulation (Finite element analysis), motion analysis, interference/tolerance checking, physical assembly joints (Ball joinby n8bot - General
Re: What CAD software? POLL - 8 years ago
It looks like, by jumping through some hoops, one can convert openscad documents into STEP or other formats, as described here: This is far from ideal for anyone who wants to work on the design with a program other than openscad. What I would like to see, is an Openscad Fusion360 add on (they have a very robust API, it seems) that allows people to create geometry in Fusion 360 using Openscad sby n8bot - General
Re: What CAD software? POLL - 8 years ago
One thing to be careful of, is that files made in openscad are basically doomed to only be useful in openscad. Real parametric cad software outputs to common formats like STEP or IGES, whereas AFAIK, openscad only outputs STL (and usually, very low resolution because users don't know better or don't care). For these reasons, I usually recommend against Openscad except for very small, one-off "thby n8bot - General
Re: Stepper resolution vs ball screw accuracy.
- 8 years ago
Oh, and as for the bed dropping, I haven't accounted for that yet. I probably, won't to be honest. On my delta, since I put the extruder on the effector, it has tendency to drop if the motors cut out, so I'll just keep the motors energized after a print like I do currently on my delta. It might also be worth putting some shock dampers at the bottom.by n8bot - Mechanics
Re: Stepper resolution vs ball screw accuracy. - 8 years ago
My thoughts about the backlash were the same, and so I originally designed my printer around ball screw no 1. I'm starting to second guess myself, but 5 microns of error in Z is really not going to be noticeable anyway, even if the weight of the bed didn't cancel it out, is it? What effect on the extrusion width would 5 microns of vertical error have? I mean, it gives me the best stepper resoluby n8bot - Mechanics
Re: Stepper resolution vs ball screw accuracy. - 8 years ago
For fun, lets add a new third candidate: 3) 2 mm lead, c3 accuracy with zero backlash, 10 micron full step, 280 mm usable travel.by n8bot - Mechanics
Stepper resolution vs ball screw accuracy. - 8 years ago
So I've narrowed down my z axis to two choices for ball screw: 1) 2 mm lead, c5 accuracy with a 0.005 mm backlash. This screw gives 10 micron full step layers (or 5 micron with 0.9 steppers), and 330-340 mm of usable z travel. 2) 5 mm lead, c3 accuracy with zero backlash. This screw gives 25 micron full step layers (or 12.5 micron with 0.9 steppers), and 315-325 mm of usable z travel. Both areby n8bot - Mechanics
Re: 4 motor CoreXY? - 8 years ago
QuoteFrankPropaneTank ... But to entertain that idea for a moment the error will never be more than a full step, as if it were the stepper motor would lose many steps. In my setup we have 80 steps per mm so the maximum error we can have will be 0.0125mm or +- 0.00625mm really nothing to worry about. ... I think you mean 0.2mm, a full step at 80 MICROsteps/mm with 16x microstepping.by n8bot - CoreXY Machines
Re: Future Printer Mods - 8 years ago
I love that nozzle design. Thanks for sharing this.by n8bot - General
Re: 2000mm Closed belt - 8 years ago
Misumi sells closed loops up to 1700mm of MR2 (GT2). they sell 2061mm of MR3, and even longer of MR5.by n8bot - Mechanics
Re: What CAD software? POLL - 8 years ago
QuoteLykle Sure! Ah well, I can always go and have a look right? As long as it supports my 3D mouse. It sure would! Also, I didn't mean this in an antagonistic way -- just that the way you were talking about IronCAD, it sounded like you might like Fusion360... and I bet they have more features that will make your jaw drop... especially for the price. (Free... even for business... if you make lby n8bot - General
Re: What CAD software? POLL - 8 years ago
You should try Fusion360. Beats the pants off of any ten year old cad program.by n8bot - General
Re: Overcoming the limitations of support material - 8 years ago
QuoteDaGameFace Slic3r has a different interface material setting separate from support pillar material and also does branching pillar supports to save material. I use PVA with S3D and just dissolve all the support material in water. Works really well Do you have any albums showing the process and results? I'm about to venture into PVA supports, and I want to know everything I can beforehand.by n8bot - General
Re: 1 hotend 2 extruder - 8 years ago
Quoteelmek6 thx n8bot I tried the bowden tube, actually it's better now (but need more testing) thx DaGameFace I work with 3mm Filament with direct extruder. If I use the same wire, then 2A stepper lose the torq. Because they will share the power too. No problem! Just to be clear, you are running the filament through the bowden tube, right, but not using it as a bowden? On my delta, it providesby n8bot - Mechanics