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General discussions. For specific printers / electronics / fabrication methods / softwares, please see other sections.
Re: RepRap using DC Motors! - 10 years ago
I may be stating the obvious but you guys ARE talking about PID control of a DC motor, right? The important thing is the encoder, not the DC motor. You can use the encoder with the stepper too because with the encoder you have FEEDBACK. A magic word All it takes is one mis-step of the stepper and it never knows it is now always one-step off. Feedback can keep that from happening. (or moreby shadowphile - Reprappers
Re: what is a 'normal' feed force required from extruder motor? - 10 years ago
Ok, I think I got this worked out, thanks to a number of scattered pieces of info: -Friction of 3mm PLA through close-fit PTFE tube of ~24 inches was not huge, but significant. I cut the tube in half. Strain on the effector is higher but I have a chain of rubber-bands pulling on the top of the loop to help it out. Might be a problem once I start trying to dial in some accuracy. -I raised theby shadowphile - Delta Machines
Re: what is a 'normal' feed force required from extruder motor? - 10 years ago
I just bought a small digital weight scale so I can do some force tests. I thought my extruder motor was a NEMA23 but I was wrong! It's a long (~2") NEMA17. In wonder what the other built- and kitted- Kossel Mini's are using.... edit: did some wandering. The Kossel Mini is native 1.75mm design. People using 3mm have had to basically redesign the extruder setup, especially the addition of geaby shadowphile - Delta Machines
Re: what is a 'normal' feed force required from extruder motor? - 10 years ago
This is brand-new V6 e3d. @AndyCart: At first estimate it should be close to the same @hercek: I came across this article and I would LOVE it, the exact kind of sensor I would devise at work, and a really useful live gauge to monitor and tweak over time and changes. Alas, I'm not prepared to go that route right now, it should not be necessary to just get the setup working. But definitely somby shadowphile - Delta Machines
what is a 'normal' feed force required from extruder motor? - 10 years ago
Hi All. Still trying to get to the point where I can stop fooling with a reliable extruder feed and move on! This is my first printer and been stalled for weeks on this. I finally got a reasonable 10mm test cube printed last night, my first almost-acceptable print. And then it started crapping out again. Without ways to measure forces it seems I have to rely on either crowd feedback or trial anby shadowphile - Delta Machines
best source for steppers? - 10 years ago
Sorry to ask such a basic question but I can't find a decent answer. I know there are steppers everywhere, I want a more integrated solution aimed at consumers (ie cheap). My current extruder motor is too weak, so I need one with a gearbox. Since the odds of finding one that will drop-in-replace my current design and still fit the the filament-feed parts I have is very low, I will probably haveby shadowphile - Reprappers
Re: I have no hair left because I pulled it all out! - 10 years ago
I figured out the problem. Blender did not have the 'ascii' checked. That would seem to indicate that Slic3r can't do binary versions even though Blender indicates it is part of the standard. Any, it's slicing away like a Ginsu chef! thanksby shadowphile - Reprappers
Re: I have no hair left because I pulled it all out! - 10 years ago
Many good ideas E3-DS, thanks. Now if could only get Slic3r to work. On one computer it takes my simple 10mm cube .stl and creates junk. Last night I tried it on another desktop and it would crash (disappear) when I tried to drop the file on it. And Kisslicer also crashes. Might be a wonky model.by shadowphile - Reprappers
I have no hair left because I pulled it all out! - 10 years ago
Yes, the subject line is useless. So far so is this project. I just bought my first printer, a Kossel Mini kit. I've already had multiple printed-parts break, the autolevel screwed-up so bad that a following homing command did not respect the level switches and broke a switch mount, it's now held in place with electrical tape. The custom-designed extruder-tip-as-z-probe I received was not onlyby shadowphile - Reprappers
Re: Plating sticky stainless - 10 years ago
I just got my first printer (Kossel Mini) and can't get the PLA to extrude for more than some seconds and if I stop, it seizes up and I have to tear it apart to clean it out. gah! I haven't even printed anything yet and already I feel like I'm trying to redesign this thing! (that's good and bad) Anyway, I've concluded that: my fan is too small, and PLA is sticking too easily to the stainless hby shadowphile - Developers