| Gallery, Projects and General > Project Logs |
| A kit 3D printer |
| << < (4/6) > >> |
| Pete49:
ddmckee59 I was printing at 50mm/s and that was working ok but then ran into trouble so contacted the supplier who gave me these parameters: Print the wall thickness: 2 Print accuracy: 0.2 The print head temperature: (PLA temperature between 200-200 degrees, ABS temperature between 220-230 degrees) The floor temperature: (PLA: 50-70 degrees, ABS: 110 degrees) Print speed:(50-80), empty come （120-150） Since then I have had the problems happening. I have even uninstalled the program and reinstalled it but it hasn't improved anything. I found the floor temp at 65 degrees works fine and my filament now sticks to the bed but it now lays the filament too thin and as the pics show, a very web like structure. :Doh: Now off to double check everything again. Pete |
| Joules:
Pete, I agree on print speed being about 50mm/s but nothing to stop you backing that off to say 30mm/s. I am very wary of printing at 0.2mm layers with a 0.4mm nozzle. The squish/weld factor is not great and I associate it in my prints with most failures. For setting up and calibration I would ONLY recommend 0.1mm layers. If you are under extruding as it appears this allows a fighting chance for the filament you do extrude, to get pushed onto the layer below. It also means the first layer is pressed well onto the bed, you should be able to print onto a cold (20℃>) bed. One of the bed materials I use here is Perspex, and cold the bond can be too good. I will juggle temperatures and start the first layer at 190℃ and switch to 205℃ a couple of layers up, with PLA once the foundation has taken, back the bed temperature off to ambient, or down to 30℃ Check in your printer settings to see if there is an initial offset for the first layer, this can catch people out. They think they are printing 0.1-0.2mm and the offset adds another 0.1mm or more, so the filament never gets pressed onto the bed. Please give the extruder a test, make sure it pulls 100mm of filament when instructed. Is your machine direct drive or bowden feed ? You must get that 100mm extrude as accurate as you can, that determines the metering of molten plastic. Run the test again this time feeding plastic through the hot end. Mark your filament with a Sharpie, say 110mm away from the extruder, now extrude at a slow rate 10-20mm/s and measure your mark to see if 10mm is still sticking out the extruder. If not change the step rate per mm in your software or find out if the filament is slipping/grinding in the extruder. Measure the filament that gets extruded once cool, is it <0.40mm ? If yes, you could have a nozzle blockage or damaged tip (a hot end crash can put a burr on a brass nozzle that can curl the filament) Use a gas jet pricker to clear a hot nozzle, but be careful as this can also open out a brass nozzle. Another trick is to remove the nozzle and heat it to 300℃ or so with a heat gun, this will pretty much vaporize any remaining PLA residue (watch it bubble out and smoke) |
| Joules:
Hey Pete, don't get too down about it all. I am having awful trouble with one of my printers (electronics) and it's costing me a huge amount of time and effort to sort out. I should really pull my finger out and build my own printers as nothing on the market at the moment ticks all my boxes :scratch: under £2k I really want five of them for my print farm. The motley collection I already have are all different, with different methods of failure (the tech is still in its tantrum years) :bang: |
| efrench:
I recently had a similar issue with my printer. The first few layers would print fine, then the extruder would start grinding the filament and the hot end would jam. I was certain that the nozzle was failing, but it turned out the filament was the problem. It was inconsistent in diameter, 1.72mm mostly, but occasionally it would be 1.8mm. I think it also had absorbed some moisture. If you haven't already, try printing with a newly opened roll of filament. |
| Pete49:
Joules I'm not despondent as I know its a learning thing and I'm learning :lol: I think I forgot to send pics of the extruder which I will add to this message. I noticed last night that there is molten filament coming out of the heating block which I will examine tonight. The one thing I noticed is the bottom layers are a bit thin though I don't know what to adjust as I need to get it to print properly overall before I play with tweaks. I'll give the other things you mention a go and see what happens. efrench the filament is fine (I hope) as it came from the supplier and humidity mmmmm what is that? rain too.... last time we had rain my 20 year old hid under the bed having never seen it before :lol: well not that bad but close. Pete |
| Navigation |
| Message Index |
| Next page |
| Previous page |