I think there is a big difference between the Sbase and the Base. The SBASE is smoothieware compatible and has a different (faster) micro controller. So do you have the sbase or the base?by Dejay - Controllers
Haha ok that is a simple solution. But hey it works and that's really awesome! Getting is done without getting distracted is what counts and showing the prototype. And then "know-it-all's" like me can come and suggest improvements I guess ultimately you'd want the IR sensor to only "see" the heat bed (but then again any screen or vignette you'd put in front of the sensor would also have a IR emby Dejay - Powder Printing and Selective Laser Sintering
Well sand apparently works too. But beware: It's coarse and rough and irritating and it gets everywhere.by Dejay - Powder Printing and Selective Laser Sintering
About the white / black powder: I shot VDX a pm and he said that it looks like charred nylon. I did read up on your blog so I saw that you did add carbon powder. I think dark nylon would definitely be a good way if you can get it. You ordered WHITE nylon from rpsupport, right? Controlling and modulating the laser power according to the surface temperature below the laser and the speed would seemby Dejay - Powder Printing and Selective Laser Sintering
I think the common material for SLS is nylon. Does ABS / PLA even work / is available? AFAIK this place helped the you-sls project out with a reasonable price for a small order of glass filled white nylon 12:by Dejay - Powder Printing and Selective Laser Sintering
WOW congratulations Lukas! That are some very nice first print results. Well done! I didn't follow your project for a while. There is a lot of news to catch up to. Do you have a different place where you discuss the project? (not that I'm suggesting that, this forum is great, just wondering). Why is the light flickering like that? Is that a feedback response to IR temperature measuring? I've sby Dejay - Powder Printing and Selective Laser Sintering
Congratulations! Really great news for SLS printing.by Dejay - Powder Printing and Selective Laser Sintering
Hey that's an even better idea. If it worksby Dejay - Controllers
Thanks arthurwolf! From the description - does this mean that if I use the SBoard on USB then I won't get the sampling error problem? I guess I should try myself. But this might explain why @innkeeper didn't experience problems with the temperature reads? Maybe because he unlike CapnBry used it powered over USB? BTW is the 0.5A version enough? It's only for the chip itself right? That one is mucby Dejay - Controllers
Quoteflyway97 1. take off component D5 and F3; 2. Connect R-78E-5.0's 3 pins to the 3 solder joints as shown in the picture, (pin1 to label 1, pin2 to label 2, pin3 to label 3),then it can work well. Damn. I just got my SBase and now I read this. So you would have to use wires to attach the spots with the legs of the R-78E5.0-1.0 right? I only found this for like 11€ at a consumer electronicsby Dejay - Controllers
A few random ideas from someone who doesn't have any experience with heated beds: 2 Ohm at 12 V would be 72 Watts and 6 amps. 1 Ohm at 12 V would be 144W (V^2 / R) and 12 amps. That is not too much compared to a light bulb. Maybe you need to configure the resistance of your heat bed in your firmware? If it assumes it's a smaller bed with a lower resistance then it could be too timid on the heatby Dejay - Delta Machines
Very cool! Found another semi interesting video for this topic: 5-axis 3D printing - Surface Conformal 3D Printing (5axismaker)by Dejay - Developers
The_digital_dentist kindly explained it a few posts up. The problem is the interface of the processor with the sd card (SPI). Reading from it or streaming while printing won't be a problem. So printing through USB or printing from SD won't be a problem. Or writing stuff on your PC on sd card then putting it in and printing off it should work too. It won't be reading the gcode very fast. Just traby Dejay - Controllers
Quotedc42 By the time you have added the RPi to the SBASE, you could have bought a Duet for the same or lower price. The Duet uses an SDHC interface to the SD card. The file upload speed from the web interface to SD card is a little over 170Kbytes/sec, or about 10Mb/minute. True of course, really a bummer. Slow SD card speed is a limitation I didn't think about at all! I guess just using the priby Dejay - Controllers
Thanks for the info! If the SD card is the bottleneck then I guess the best way might be to use a raspberry and send via USB. If the SD card is faster on the raspberry lol.by Dejay - Controllers
Hmm thanks for that. That's a pity. Is transfer over USB faster?by Dejay - Controllers
Thank you CapnBry for testing it out! Now I feel even better for ordering it Depending on how much I like smoothieware I'll just make a direct donation to it. I didn't order any LCD for the board. I want to just use it over the web interface and without USB / SD card. Is that a bad idea? Can I even copy a gcode file over ethernet onto the board?by Dejay - Controllers
Thanks. So that means you'd have to have the lens after the mirrors - which means the lens has to be rather large? I guess a moving laser head is really much easier to implement.by Dejay - Powder Printing and Selective Laser Sintering
QuoteVDX ... while this can work with high quality gas- and NdYAG-lasers and pretty expensive fiber-lasers, 'adding height' or focus distance is really bad with laser-diodes - the beam quality is so poor, that with a focus distance of >70mm the shape of the spot will resemble not a round spot, but a line/rectangle with roughly 0.4mm x 0.1mm and even worser with growing distance Thanks VDX. Iby Dejay - Powder Printing and Selective Laser Sintering
I just wanted to "get rid" of some thoughts about an idea to build a laser scanning setup for SLS. It's really just an idea and I haven't even found a solution to implement this yet. This idea probably won't work out but maybe it's still of some value to someone. The main problem with two rotating mirrors on a galvo is that your focus distance is varying with X/Y so you would get different intenby Dejay - Powder Printing and Selective Laser Sintering
Has anyone tested this board yet? I've ordered it now as a simple to use / cheap electronics kit. I'm also curious if these boards have mosfet protection with a freewheeling diode to avoid the high voltage spikes from the parasitic inductances of the heat bed / heater cartridge. I hope by the time I get it someone will have already ported DC42's method for quick delta autocalibration to smoothiby Dejay - Controllers
I think an aluminium plate with a buildtak sheet or PEI coated. I bought one here but haven't tested any of it yet.by Dejay - Delta Machines
Yeah randomized all the starting variables by +/- 90% to see how many solutions there are and ran the algorithm 1000 times (on the PC). In my experience there are always local minima with higher error values and if you have the probe points as "concentric circles" (e.g. points 60° around center) you can get multiple solutions with 0 error value. But if you start out with close enough measured valby Dejay - Delta Machines
This is from the Cherry Pi III thread about calibration problems and I didn't want to post this there because it's rather off topic: Quotedc42I'm coming to the opinion that it's probably not worth adjusting the diagonal rod length during auto calibration. It's the one parameter that you should be able to get spot-on. When I use 6- instead of 7-factor calibration, the RMS error increases only sliby Dejay - Delta Machines
Well that's a real bummer vreihen... But I want to build a delta with 4020 verticals so I'll need to print my own "plate" anyway. Still some time off though.by Dejay - Delta Machines
Thanks for the pictures! I'm going to try to 3D print the eccentric spacers. That belt tension system on the robodig parts looks nice also. PS: Sorry Andy for going off topicby Dejay - Delta Machines
Yeah I want to use 4 wheels for the carriage as well. But without the eccentric spacers.by Dejay - Delta Machines
I think generally you probably want to search for "arduino sketch" or program to control your robot. Not firmware. Reprap firmware are just arduino programs. Maybe this helps you to find what you are looking for. What is the name / model of the robot you want to use? And what controller do you want to use?by Dejay - Polar Machines, SCARA, Robot Arms
Quotedougal1957ooznest do the Delrin Openbuilds mini V-Wheels and ship out same day if in stock they also do V Slot extrusion at a fair price (Tho not as cheap as Motedis) Oh thank you! I saw ooznest before on ebay but never checked out their online store where they are much cheaper than on ebay. About ~20% markup compared to openbuilds incl vat. 43.39 € for 9 mini v wheels including shipping.by Dejay - Delta Machines