Right - I don't need to worry about the above tooooo much now thankfully. I don't know why I can't get any settings returned but it must be (maybe) to do with the firmware option not having eprom support perhaps. Anyway, with the cold extrude issue sorted, I was able to happily muck about with the e-steps and got it settled around 87s/mm as being pretty accurate. I've only tested that over 150mby Mr Joshua - Controllers
Hmmm, well I fired up the printer and connected it etc, but when I just send M92 alone to it the log varies what is shown. For instance one time it will show N39 M92 *2, then another was N66 M92 *8, then N87 M92 *7 etc etc, so I'm sure this can't be right for the Esteps since it's varying each time I send the M92 command by itself with no parameters. I'm pretty sure this must be me doing someby Mr Joshua - Controllers
Ahh, I never spotted that before. Brilliant thank you so much! Will try this tonight once I'm home.by Mr Joshua - Controllers
Anyone able to assist with this Estep conundrum at all please? Really grateful if someone can point me in the right direction, thanks.by Mr Joshua - Controllers
Not sure what happened here sorry as the image I added and half of the post disappeared but the main important bit is there at least! Thanks allby Mr Joshua - Controllers
by Mr Joshua - Controllers
Hi all, am after a little help if possible with extruder estep settings on a prusa Mendel i2 that I'm rebuilding for a friend if possible. I have it mostly functioning except for two issues: 1 - Main issue - the extruder pushes out 50% more filament length than it should (so 150mm when you tell it 100mm). Now I know of course how to calculate a new ratio for this normally, but here's the probleby Mr Joshua - Controllers
Hi guys, does anyone know if you can buy ready made loops of belts in different lengths from anywhere? I can try to cut and join the ends but would rather buy one ready made if I can do. Thanks!by Mr Joshua - Mechanics
Don't worry guys - i think I found the cause. Belt tensioner spring on the Y axis was snagging on something, and must have been making the belt skip when it happened. So far so good now....by Mr Joshua - General Mendel Topics
I've been using my prusa for ages now to get useable (if not stellar accurate) prints without any issues. Last night the X belt came undone, resulting in a ruined print, and it didn't really phase me as these things happen of course, but since putting that right I've had nothing but problems (ignore the 'good' print in the pic - that's what the part should be like): Can anyone point me to a lby Mr Joshua - General Mendel Topics
It doesn't work at all, regardless of being hooked up to any device, or to nothing. I found the cause: my own stupidity! Thought it would be one way or another but nice to know I can stop this happening when I buy a new PSU. I put screws (intentionally!) through the bed' tracks on either side, into the plywood behind the bed. No problem in that as such, even though it's a bit rough! Except, thby Mr Joshua - General Mendel Topics
Makes sense cheers. It's been off some time and won't come on still. Onboard fuse is ok. No sign of anything burnt etc. or smell. It's one of the silver box type switching power supplies that people sell specifically for prusas. Pretty much identical to this: I still can't tell how there could have been a short though but obviously something has gone wrong. Edit - especially since the specby Mr Joshua - General Mendel Topics
The exact problem was I rebuilt my heated bed/platform (turned it so the element and writing were on top), reassembled, replaced the carriage, then tried a print. When I connected the printer I was able to home the axes and it all moved ok, but when I then ran the print (ie the bed tries to heat) the PSU turned off and won't come on. Interestingly my friends PSU died recently also but he hadn'tby Mr Joshua - General Mendel Topics
Hi guys - just a quick question re' heated bed, ie if it should give straight continuity across the terminals when tested, or not? And if it should have a certain resistance etc? I think I've got a fault with my PSU potentially after rebuilding my printer, but cannot find a reason why. Am just wanting to check if the heated bed could be at fault or if this is normal for them? Thanks!by Mr Joshua - General Mendel Topics
Hi guys I've just made a pretty basic model in sketchup to make some camera mount brackets for a project I'm doing and something weird is happening between repetier/slic3r that I haven't seen before. The model loads fine into repetier and this is how it looks (4 of them together): Then after slicing looks like this. Note that the model shape is correct still, but the skirt it prints aroundby Mr Joshua - General Mendel Topics
Update - ok, I increased the segmentation of the circles to the ratio suggested of Dx2 so 40 for the outside 20mm one and 32 for the 16mm inside circle. The outer now measures at 19.5 instead of 19.2mm, so it's closer to the intended 20mm diameter, but the inside is now 15.25mm instead of 15.40mm so it has closer in a bit and gone further away from the intended diameter. Not sure where to go froby Mr Joshua - General Mendel Topics
Ok, I've looked in sketchup and can see under the measurement for the circle radius it has the number of segments. So far so good. So I printed a 20mm tube (OD), to be 16mm on the inside. It has 20 segments for a 10mm radius, but I guess I should reduce that to 10 sides if it should be based on the diameter not the radius right? Anyway, the actual printed measurements are 19.2mm OD, and 15.4mmby Mr Joshua - General Mendel Topics
Ahh ok thanks - will investigate. Very pleased to get it so accurate now anyway!by Mr Joshua - General Mendel Topics
Thanks - I guess that would have saved me a couple of minutes on the calculator but I was pretty damn close with the above calculation. Here's the result now: I think 0.02mm is so close that there's no point trying closer than this as it'd be unlikely to give a consistenly better result, since I'm sure you get a bit of variation from one print to the next. That's just under 1 thou of an inchby Mr Joshua - General Mendel Topics
My X & Y steps are set as 78. something steps/mm, so I am increasing them to 80.14 and will try that. I worked out that it is printing at about 95% of the intended size so this increase should get it very close I think. I'll report back once I've tried it! Is there a setting in slicer or something for the number of sides to use on a circle? Or a ratio you can set it so it calculates itselby Mr Joshua - General Mendel Topics
Sorry for not responding sooner guys. Have been pretty busy! I looked over the printer yesterday at last and found a couple of issues as I tried to print something. The idler on the extruder had split and was thus causing erraticextruding behaviour as it wasn't applying pressure properly at all on the filament. Also, one of the two bolts attaching the top half of the extruder carriage to the bby Mr Joshua - General Mendel Topics
Hi guys I've now managed to use my printer for printing several useful objects, which is great, but now it's kind of tried & tested for basic stuff, I want to try doing smaller prints where the accuracy/quality matters a bit more. So I tried printing a small cylinder/tube as I hadn't done anything like that. There's a couple of issues I think and after looking through the wiki page on commby Mr Joshua - General Mendel Topics
Never mind guys - I searched more and found what I needed. Mostly I had been looking at Slic3r and Repetier rather than sketchup, but here's the way to do it (yes it means a second, mirrored model):by Mr Joshua - General Mendel Topics
Hey guys I just started playing with sketchup a bit and last night created a bracket to hold a big paper towel roll to my tool trolley out in the garage. I need to print one that faces the opposite way now, but I'm not sure where/how the easiest means is of doing this. Is there a setting in Sketchup/Repetier/Slic3r that would print a mirror image somehow? Or do I have to create a 2nd stl fileby Mr Joshua - General Mendel Topics
Wow, I just watched the video Cliff and it sounds terrible! Your printer looks very nice though compared to mine. So that horrible noise etc was due to the quality of the PLA somehow? I haven't been a member here for long but I've found it to be a very pleasant and helpful community. I think think it's because everyone is trying to learn and improve and achieve something. I run a couple of foby Mr Joshua - General Mendel Topics
By the way, here's a pic with an earlier print on the left and a current one on the right. It's showing on the wrong side though as it doesn't show the slightly offset layers:by Mr Joshua - General Mendel Topics
Thanks Cliff - I'll have a look at your stuff to see what's what. It'd be interesting to try the stuff my friend uses as he gets very neat results with his. This is the PLA I have (I got the grey 3mm stuff). It's the cheapest I found, and usually we all know what the cheapest equates to in terms of quality.....by Mr Joshua - General Mendel Topics
Thanks for the replies & suggestions again. Mine has been subject to an odd and coincidental turn of events that has turned out well. I spent time a few nights back tweaking slicer settings and firmware adjustments etc. When I then loaded a model to test the changes it errored on slicing. The error related to a file it wanted in an assumed default directory, which was odd since I'd not chanby Mr Joshua - General Mendel Topics
That's an interesting observation as my mate arrived at almost the same conclusion a few days ago when he had to scale up a part he was doing. He reckons it was a conversion between metric/imperial. Will look at this file later when I get home thanks.by Mr Joshua - General Mendel Topics
Thanks - it does seem to be certain items yes. But I've only done limited prints anyway. The 20mm test cube never seems to unstick, which seems odd since it has a relatively small footprint compared to the cog thing (forget the filename but was a file that came with my repetier install) which is much wider but unsticks every time without printing a brim. Interesting theory and there could be sby Mr Joshua - General Mendel Topics