I wish motedis would sell fitting delrin wheels for their aluminium profiles. It's a great shop with very fair prices in Europe! Hmm I think we need is kind of an "inverse kickstarter". Customers request / pledge for certain items to be manufactured and companies can bid to make them!by Dejay - Delta Machines
Thanks for the answer! I didn't realize you used Vslot wheels on normal extrusions. I've decided to just order some mini V wheels plus some V slot extrusions for the verticals only.by Dejay - Delta Machines
Thanks you for the pictures ybanrab! Those carriages look pretty nice. The lasercut MDF plates and the "wings" create a very cool "gothic" style I guess from the M3 bolts you used 623 bearings (3x10x4 mm). The mini V wheels use MR105 5x10x4mm bearings - the same outer diameter but thicker inner diameter. So the bearing balls are actually even smaller there. So 623 should be fine. And yeah I aby Dejay - Delta Machines
Hello Andy. this has probably already been asked and answered but this thread is long: What made you switch over to the wheels in slots instead of the bearing rollers on the flat aluminium parts? Simplicity? Noise? Having one side free? Since V-slot or T-slot wheels still seem more expensive and a few more bearings. Maybe someone can point me to a place where this was discussed. I started a thby Dejay - Delta Machines
Ah thank you! I was just looking it up (easy enough to find) but you posted the perfect picture. It seems 6 bearings is enough too. My guess the weakness is that you still need wheels out of durable material. A tape would be messy. And yeah I thought about heat shrink tubing for a second but it's probably a good approach. Cheap bearings and cheap heat shrink. And it's even available with differeby Dejay - Delta Machines
So the current discount for shipping costs on openbuilds for V-Slot send me into a deep cycle of looking, comparing, discarding, thinking and brain overheating again. It's about linear motion again. And yes I know I shouldn't waste my precious few brain cells on problems where plenty of engineering solutions already exist... but I can't help it! A single wheel on a V-Slot still costs $5 and you nby Dejay - Delta Machines
Wow stall detection sounds interesting. And 3A is enough for big Nema23 right? But I guess they really require a new board with the SPI lines. Might as well hard solder the stepper IC then. And you'd need new software too if you want to handle stall detection in a meaningful way. At least you could use it to finely tune your max acceleration and current. Maybe even automatically! And I thought tby Dejay - Controllers
I would guess that you could also improve bridging by printing slowly so the plastic can cool off. So ideally a slicer should take the cooling properties into account too. And of course add to the bridge slowly, line by line.by Dejay - Developers
So just curious: If he wouldn't have made claims that the board is open source hardware (not the software which is open source) then he wouldn't have gotten deleted? Do these boards use a board design directly derived of the smoothiebord? I mean if they don't then they are not in breach of the GPL license of the smoothieboard. Just using the same components it shouldn't be too hard to make yourby Dejay - Controllers
Interesting thread! I was looking for a thread on how to build your own electronics / a stepper driver. I now understand that it's practically trivial with the pololu and A4988 compatible stepper drivers. Simply connect step / dir pin high or low. Works with 3.3 or 5V. But what I don't understand is why there is a capacitor in all the DIY electronic boards with these stepper drivers. Where doesby Dejay - Controllers
Quoteasbo QuoteDejay Probably around 110€ including shipping from US and import VAT They're actually in Hong Kong. I don't know about the rest of Europe but in the UK we tend to get charged a lot of VAT etc on stuff from the USA but very little, if any, on stuff from China/Hong Kong. Ah I see! I think that's mostly because they cheat and write "gift" and a product value <22€ on the parcelsby Dejay - Controllers
Thanks DC42, certainly interesting! Especially with your nifty autocalibration In Europe with shipping and import vat it's still more expensive though: Probably around 110€ including shipping from US and import VAT 126 € including shipping from UK 120 € including shipping from UK At that price point I could also wait and get the new replicape and a beaglebone black for 150€ (including the nby Dejay - Controllers
I just searched for info about the AZSMZ Mini and as a user and potential buyer I find it a bit unfortunate that the wiki page has been deleted. But from what I understand the AZSMZ Mini not only made false claims but it also violates the smoothieboard open hardware license? Too bad really. Because this one together with the MKS SBase seems to be the cheapest board upgrade compared to the old rby Dejay - Controllers
I know this is an old thread but I wonder if anyone has made a finished vacuum robot by now? A vacuum robot is one of the things I want to build. I'd love to have one but they are quite expensive and not very clever. I would think that actually building one yourself should be cheaper. The projects I've found so far: CleanBOT- Your DIY floor cleaning robot by MosfetN This is by far the most advaby Dejay - Let's design something! (I've got an idea ...)
*Wooosh*by Dejay - Developers
Quotedc42I am more of a software engineer than a mathematician too. I looked up the technique for solving multi-variable linear least squares on Wikipedia. I am aware that some of the techniques I use are not optimal, for example there are better ways of solving the Gramian matrix equation than using Gauss-Jordan elimination. The numerical differentiation I am using could be replaced by an analytby Dejay - Delta Machines
Hey DC42, awesome! Really great work. I've tried to do the same for machinekit a while ago but didn't get it integrated properly and had some bugs with the numerical optimizer and used lengthy formulas. But it worked. Your approach seems so much more elegant. Unfortunately I don't understand any of it Well I figure you write the kinematic solution for Z=0 into a matrix type equation and use a sby Dejay - Delta Machines
Well if you can program a bit you could try adapt something like marlin. Or just use the gcode interpreter in marlin. The inverse kinematic code for the meArm is here: int b = sqrt ((x * x) + (z * z)); // b = distance from the origin to the start of the gripper //Serial.write(b); float q1 = atan2( x, z ); // q1 = angle between the horizontal and the line b //Serial.prby Dejay - Polar Machines, SCARA, Robot Arms
This is really awesome! I've been looking for a Raspberry PI solution for 3D printing. Just some rambling thoughts: What I find compelling about the Raspberry PI is the cheap high speed camera module. Mostly of course for monitoring the build remotely. And theoretically - well this is some pie in the sky stuff but anyways - with computer vision using the GPU you could do some tracking of the priby Dejay - Developers
Not what you asked but I just had to share it I just bought the small (tiny) kit for a servo driven robot arm, the meArm. For 33£ / 50€ I simply could not resist! The plans are on thingieverse and there are also bigger 3D printed versions of it (see comments). The design of the arm seems to be rather smart, the servos / steppers are on the base not on the arm etc. Not clue if a reprap firmwareby Dejay - Polar Machines, SCARA, Robot Arms
QuoteJoshua Dickerson Actually we anticipate a lot of hobbyists will want our printer-we're just having a difficult time keeping the final cost under $4K. It's starting to look more like nearly $5K. Unfortunately, nylon appears to be nearly transparent in all the wavelengths available by semiconductor diode lasers (even the IR ones). We also went the CO2 route because we found a way to do full coby Dejay - Powder Printing and Selective Laser Sintering
QuoteJoshua Dickerson we were rejected by every single startup accelerator we applied to (which is nearly all of them.) Sorry to hear! Convincing people you are an entrepreneur when you're really more of a tinkerer is always a tough sell. Been there myself. You have to pretend and masquerade with the right kind of costume... e.g. business suit and lingo... Plus they always want to see patents loby Dejay - Powder Printing and Selective Laser Sintering
Wow that is fast So I guess you use a galvo setup not a gantry. Do you use an F-Theta lens to focus the laser?by Dejay - Powder Printing and Selective Laser Sintering
Your project looks very nice! I wish you the best of luck. Do you use a gantry with mirrors? Or galvos? Unfortunately I cannot edit the original post anymore (time limit). Maybe an admin could unlock editing feature again? Or maybe the wiki would be a better place. I really just wanted to write down a current list of what I've found Quote Polyforge (www.polyforge.com) 20W CO2 Laser Laser speeby Dejay - Powder Printing and Selective Laser Sintering
Just some articles I've stumbled over today by chance: Adobe Files Patent for ‘Smooth 3D Printing’ Process (I think it's a different process) 5AxisMaker – First Affordable 5-axis 3D Printer (you probably already know about this).by Dejay - Developers
[email protected] : I don't see the need for slicing on a phone, thats probably me growing too old. Haha I can relate to that. But a cheap $50 android tablet for example could be the perfect "screen" for a 3D printer. Just one use case. I think html5 is great for a prototype for another reason. Anybody will be able to test the slicer without having to install or build or compiby Dejay - Developers
Wow! Now that's just awesome! Thanks for sharing And html5/javascript as a web app for a slicer would be a great platform as well.by Dejay - Developers
QuoteRCarlyleSo, my question is, what "baby step" applications can we come up with for 5D tools that would be reasonable to implement in slicers? Top surface contouring is the best thing I can think of. What else can 5D printers do that wouldn't be hard to program? What would we actually want from the slicer? I can think of three main requirements: improve part strength in the z axis by not havby Dejay - Developers
That is practical indeed But I figure you would use finer sand for mold making? Also I'm surprised that quartz sand has a melting point of 1600°C and that you can sinter it with a 40W laser! Oh and silicon is such a confusing element! Silica, Sand, Glass, Quartz, Silicone...by Dejay - Powder Printing and Selective Laser Sintering
Wow that looks beautiful! Sand is probably not a really practical and sturdy material but it looks quite natural. Might be great for art projects. And it has to be the cheapest material! What laser and what power do you use? A CO2 laser? I've recently discovered that there are laser diode bars which are reasonable cheap for ~$200 at 40W. But I don't know if they are suitable for white powder (by Dejay - Powder Printing and Selective Laser Sintering