Is the connector on the reset jumper on, is the board being powered by the USB, Are file preferences set in arduino 23. Is the avrdude file in the right place and the right version? Hope this helpsby Myles - General
Sorry , electronics is not my strongest and I would hate for you to burn something out on my advice. I used these instructions when I built my Mendel, Good luck Edit, I did not mention Amps, I said 0.6 to 0.8 Voltsby Myles - General
1.8 degree angle gives 200 steps and then 1/16 micro steps gives 3200by Myles - General
Not sure if understand what you are asking, but if it is Z steps, then 1 revolution of the stepper motor is 3200 steps divided by the pitch So 3200 / 0.8 = 4000 Hope this helpsby Myles - General
Also disable auto updates, disable sleep mode, backups, scans Happened to me enough times I bought the Panelolu2, best thing I've done in agesby Myles - General Mendel Topics
@nophead, You have mentioned your own software once or twice before, of all the slicer programmes I have heard people talking about, yours sounds the most intriguing. Would it be available to us tinkerers or can we look forward to it being released in the future? With flow rates, I have a home made nozzle of 0.17 mm made out of silver and print at 0.05 layer height, the extruder gear goes roundby Myles - General
i have sliced the thin wall with the settings you have given and i attach it for you to try hope it worksby Myles - General Mendel Topics
You might try perimeters =1 I have been racking my brain over the .8 mm walls on your thin wall print and I'm sorry to say that it has me stumped. It should only be laying down 1 line of filament on each layer and about the same width as your nozzle, why it is building 2 walls with a fill in between I have no idea, I shall keep thinking about it though! Lets hope someone more knowledgeable wilby Myles - General Mendel Topics
I used fine drill bits to measure mine, not very scientific I know, but a .4 passed through and a .45 did not!, so it was definitely not .35. Under print settings, layers and perimeters , what are your settings. Edit: maybe a silly question, but you did use the .5 thin wall.stl found on this page didn't youby Myles - General Mendel Topics
From my experience with different size nozzles, the walls of the 0.5 mm thin wall object should be about the same width as the nozzle, so with your 0.35 mm nozzle your walls should definitely not be .8 or .9 What are your settings in slic3r for, advanced under print settings and perimeters under print settings. Are you sure your nozzle is .35, I only ask as I bought a .35 nozzle and it turned ouby Myles - General Mendel Topics
Have you printed the calibration prints , You can find them atby Myles - General
Poppen, may I ask what size nozzle you are using. also what is the measured thickness of the walls of the .5 thin wall print, it looks to me as though there is some fill on the top layer in your photo, I think the print should be only 1 extrusion width wide. With the 20 mm box the gaps between perimeters is like laminating and could have something to do with layer width settings. Hope this isby Myles - General Mendel Topics
Kncr20, you may find some smooth rods in old printers, scanners etcby Myles - General
There is also this new one , seems the designer is trying to reduce costs where he can.by Myles - General
Which version of the Mendel? If you post the github link it may be helpful to identify which one you are after. Cheersby Myles - General Mendel Topics
A very worth while project Lets hope it gets off the groundby Myles - General
Does it not come up when you connect pronterface to your printer? I have a melzi controller, so I don't know the other controllers. It may be M501, Here is the wiki for gcode Good luck Edit, added signature.by Myles - General Mendel Topics
Have sent you an email.by Myles - Job Shop: I need stuff made!
Apart from a little too much being extruded, I can't see a lot wrong with your most recent prints, I have attached a photo of the same part ( the old version) that I have printed myself. I do NOT recommend messing about with X and Y steps unless the printed object is the wrong size. I also attach a set square stl which is 100 mm x 100 mm for you to print and measure, this can be used to set theby Myles - General Mendel Topics
Well deserved win Steve, as one of the first people to help me when I started out 5 months ago, I am very pleased to see it was you who won. I see you are still using the 0.25 mm nozzle and able to get layer heights between 0.05 and 0.2 from it. Inspired by your print quality, this weekend I made my own nozzle, it is about 0.2 mm and I am now tweaking the settings at 0.1 layer height, and shall tby Myles - Competitions
Are the teeth on the extruder gears meeting properly, they should be a snug fit, no free play but not too tight. Is the filament slipping on the hobbed bolt. You may get better help if you post this in the section for your machine. Good luckby Myles - General
Well done, that's progress. I would suggest reducing the E steps slightly, " Edit 1: ( M92 E*** and M500 to save) " ,looks like a bit too much is being extruded. A small fan might also help when doing the thin wall object, you could try printing a part from your Mendel, a clip or the idler for the extruder. Gives you something to compare to. I am sure you could increase the speed a little witby Myles - General Mendel Topics
And I have been thinking about this. I think I understand the mathematics of dividing steps, but as Nophead said, "1 step is 0.000390625 mm on the Z axis " , and extruding molten plastic from a 0.5/0.4 mm nozzle , I would think this is unlikely to make much difference. I shall try some experiments. Whole numbers for X and Y steps however, does not make sense to me. It means that over a printby Myles - Printing
Miss read topic, once I read it properly it is very interesting, another thing to think aboutby Myles - Printing
I very much agree with all of bigfilsing's last post, the 0.5 mm thin wall and the 20 mm boxes are your friends. The picture you posted looks like the belt guide I recommended, I have printed a few of them and the wall should be no thicker than your nozzle. It looks to me as though there is either too much filament being extruded or if you are using slicer then more than one perimeter is set. Iby Myles - General Mendel Topics
Finally, after many, many tries I got one to print, it wont win any prizes but I am happy. Still many improvements to make though. Lots of curling and string still. Been printing now for about 5 months, last week I decided to try out the .35 mm nozzle for the first time, better prints but does take longer! RepRapPro Mendel Crystal Clear PLA 1.75mm nozzle 0.35 mm layer height .25 mm perimetersby Myles - Competitions
Jeremy, have redownloaded files, unopened, and posted here, hope you get it sorted mylesby Myles - General Mendel Topics
Korzy, Glad it worked, yes I opened it using Freecad, when I tried to open it in Openscad, the code said it was created with nettfab! I can't answer the question of why it worked for me but not for you, sorry. Mylesby Myles - General Mendel Topics