"Meet ULIO, a 3D printer that's almost entirely 3D printed which students get to draft, print and assemble." Indiegogo campaign: What I find fascinating, from what we can see so far anyway, is that printer seems to be the most 3D-printed design I've seen so far, even besting the Tantillus in that department because the ULIO seems to be using the 3D-printed frame itself as linear guides. I guesby Yvan256 - Crowdfunding Projects Announcements
As vn mentioned, the only thing that seems remotely similar in concept seems to be the Tiko 3D printer. I'm still playing around with geared stepper motors with a rack/pinion but only for a miniature briefcase-CNC now.by Yvan256 - General
Je suis en train de travailler sur un projet pour avoir un plus petit écran LCD pour les petits modèles de RepRap et les RepRap portables tel que Tantillus et FoldaRap. Est-ce que ce projet pourrait être intéressant pour la FoldaRap? Même sans support direct du firmware, il serait possible d'ajouter un Arduino Pro mini au concept et à faire l'émulation du kit standard "RAMPS 1.4 LCD12864" (écranby Yvan256 - FoldaRap
Here's the eight palette choices I'm thinking about. The first four are based on the photo shown on this page. The last four are "green CRT monitor", "Game Boy" and the basic and neutral "black on white" and "white on black". edit: I can't seem to be able to display my attached image at its native size for some reason, anyone know a workaround for that? I tried the two types of parameters onby Yvan256 - Firmware - mainstream and related support
I'd like to know if it's possible to add support for a new LCD that would use the same graphic/data as the 128x64 I see everywhere on the Web. The problem with the current 128x64 is that it is quite big for tiny, compact or portable 3D printers/CNCs. The new LCD I'm talking about is the ST7735S 128x160 TFT LCD Display Module listed on eBay by multiple vendors, usually available for around 5$USDby Yvan256 - Firmware - mainstream and related support
Quotedc42 If you will be using a standard stepstick driver board, then the current is defined by the voltage on the pot wiper, which you can measure with a multimeter. Read the driver manual to determine the relationship. Ok, thank you.by Yvan256 - Plastic Extruder Working Group
Quotedc42 As it specifies 5V and 12 ohms per phase, the A4988 current should be set to at most 5/12A per phase = 417mA. So 12V and 417mA? Is there a way to test, measure or set this 417mA?by Yvan256 - Plastic Extruder Working Group
QuoteYvan256 "DC5V 2-phase 4-wire Gear stepper motor Full Metal Gear Stepper Motor" Specification: Step Angle: 18° Reduction ratio: 100:1 Phase Resistance: 12 Ohms Voltage: 5V Weight: 15 grams Shaft: 3mm Gears are made of metal. Steps per rotation: (360°/18° = 20, multiplied by 100 with the gears) 2000 steps Wiring Connection: Red: A + Orange: B + Black: A- Brown: B- Using an L293D IC,by Yvan256 - Plastic Extruder Working Group
If there is any way that you can get the step/dir signals from your boards, I already have the code to drive a ULN2003 in full step mode (two coils at the same time, it's a lot stronger) using an ATtiny84 or ATtiny861 (can't remember which one). edit: convert your 28BYJ-48 to a bipolar motor, it's even easier. The author reports 800 g/cm but I have no idea if this is sufficient for even a low-enby Yvan256 - Plastic Extruder Working Group
Quotesungod3k this hear you mean right? great price for experiementation. Yes, in the description it says "Suitable for 1.75 Filament". Don't forget to order two of them!by Yvan256 - Plastic Extruder Working Group
I have a low-cost (1.50$USD Chinese part bought on eBay, seller accecity2008) MK7 drive gear made for 1.75mm filament and 1.75mm ColorFabb PLA filament right here. The edge of the drive gear is not even close to being at the middle of the filament diameter so the idea should work if your drive gear is made for 1.75mm filament.by Yvan256 - Plastic Extruder Working Group
Has anyone attempted to go sub-NEMA14 for an extruder? I've seen (28BYJ-48 stepper motor but the gears are plastic) but I don't see any video or further update about it working or not. Has anyone tried any of these steppers for an extruder yet? "12V 4-phase 5-wire stepper motor 28BYJ-48-12V" Diameter: 28mm Voltage: 12V Step angle: 5.625° x 1/64 Reduction ratio: 1/64 Weight: 30 grams Shaft:by Yvan256 - Plastic Extruder Working Group
Hello Rich, is your Chinese J-Head similar to this one? Twenty dollars for the complete hotend seems like too good a deal to pass up, and I only plan on printing 1.75mm PLA with it. I know it's only been three days since your post, but can you post updates about your printer and that low-cost J-Head?by Yvan256 - Mendel90
I like the sliding bed idea!by Yvan256 - General New Machines Topics
Merci pour les informations jlguil, je vais essayer de modifier un de mes moteurs en fin de semaine pour le tester avec mon contrôleur bipolaire. edit: j'ai bloqué à la 2e étape car je ne trouve plus mon multimètre.by Yvan256 - Stepper Motors, Servo Motors, DC Motors
Here is the code for the Atmel ATtiny24. Can also be used with other Atmel microcontrollers as long as you modify the pins-related lines if needed. I'll try to update the package with a USA-Letter PDF file for making PCBs via the toner transfer method.by Yvan256 - General New Machines Topics
disneytoy Wrote: ------------------------------------------------------- > Yes, please post a link to the sketch here so > others in the future can benefit. It's not Arduino code, it's plain C code for Atmel microcontrollers. I sent it to you via email, where you able to do anything with it?by Yvan256 - General New Machines Topics
Any update about rewiring those KP4M2 motors to bipolar? Photos would help a lot.by Yvan256 - Stepper Motors, Servo Motors, DC Motors
aduy Wrote: ------------------------------------------------------- > yeah i think you guys are taking this in a > direction that i dont want to go in, so im out. I think we're still talking about portable and low-cost, is there a particular item or feature you don't like? I only have experience with CNCs, so I might make wrong assumptions on things like firmwares and hot ends for 3D prinby Yvan256 - General
HaniC Wrote: > 1. The 1/16 motor has virtually no torque. Whilst > it does spin faster, even at rated speeds it > barely has enough torque to do anything. The > slightest tap and it stops spinning even unloaded. I was afraid that it lacked torque, thanks for confirming my suspicions. > 2. The 12V variant seems to be the best performer > (as expected). I could get it to move aby Yvan256 - General
Any progress on this one? aduy: did you continue your work on your tiny Rostock-style printer you had already started or did you start one with the CoreXY platform? Hanic: did you receive the other 28BYJ motors, the 12V and the 1/16 ones? If you did, have you tested them?by Yvan256 - General
If anyone is interested I already have code that I made to get an ATtiny24 to convert dir/step signals into 4 outputs for the stepper drivers. It's nothing fancy as far as the code goes but it does the job for what I need and is very simple to understand.by Yvan256 - General New Machines Topics
aduy Wrote: ------------------------------------------------------- > it would be mostly printed parts, it works fine > with belts for the cross over so i dont see the > problem with using fishing line. I think CoreXY used an aluminium plate because of the tension required on multiple pulleys everywhere on the plate. I guess a printed frame would probably be too weak as a completely flaby Yvan256 - General
CoreXY sure looks like an interesting idea. Were you thinking about using aluminium, plastic or wood for the CoreXY parts? The more I check the video of CoreXY running, though, the more I wonder how to integrate fishing line in this design. It must not "pile up" or cross over itself on the pulleys but it's so thin that I don't know if it would be a problem for only 100mm travels. We'll also needby Yvan256 - General
aduy Wrote: ------------------------------------------------------- > ok first of all the point of this was to make a > small portable printer that can run off 5v using > these cheap motors. I think we all agree on that: small, portable and low-cost. I have no idea if a hot end can run on 5V, but if we can run all the electronics and the motors on a single 5V power supply then it's a gby Yvan256 - General
HaniC Wrote: > Yoda came out really well. Pics tomorrow. Some > minor issues with PID temperature control and > pauses during retracts but I should get to the > bottom of them. Very promising indeed. I can't wait to see the photos! > Shit... Look at the time. I'm off to bed. :-) So… I guess I'll have to wait. :-) > I'm pricing the electronics at a little less than > whaby Yvan256 - General
HaniC Wrote: > I spent some time today looking at Teacup which > can run on a 328. I managed to get it to work on > my current electronics after a couple hours of > tweaking. It can't run as fast as Marlin in terms > of steps/s so max x/y move speeds are about > 100mm/s - good enough. I'm printing a yoda as I > type to test it. Will let you know how it > performed. BTW itby Yvan256 - General
aduy: Atmel has many types of microcontrollers available, AVR is simply a type of core processor, like 8051 or ARM. HaniC: for the main Atmel IC, I'm hoping we can stay with a DIP package, so maybe go with an ATmega644P/ATmega1284P instead if possible. If the firmwares are coded properly, worst case scenario we'll only have a couple of lines to modifiy to change the pins assignments, etc. But Iby Yvan256 - General
Which Arduino model is the question here. Different models use different Atmel microcontrollers. The older Arduinos used the ATmega328P which only cost around 3.50$CAD.by Yvan256 - General
HaniC Wrote: > For the controlling the steppers I'm planning on > using either cheap discrete logic or a small > PIC/AVR/MSP430 as well as a couple of ULN2803As to > handle stepper control taking in the current step > + direction (+ enable/disable) inputs used. > Burdening the main controller with low level > stepper control will not work so this isn't an > option . I alby Yvan256 - General