Gallery, Projects and General > The Design Shop
3D Printed Quorn Tool & Cutter Grinder
Joules:
Haaaaa, been a long time since I had a print failure, well, I just had one :(
I am so thankful it was only 1hr into this 24hr print. Serves me right for being cocky and trying to print both parts at the same time. The larger part was right on the edge of the bed and must have got cooled faster than the rest, so it started to curl. It's not a total loss, I was a bit BELT & BRACES in my print settings. I went a bit heavy on the wall thickness, again this could have contributed to the curl as it gets really thin where it started to lift. I had printed a skirt to hold it down, but it seems to have pulled away from that. Maybe printing on a raft would be better, but the surface finish suffers.
On to the next one, new settings to be determined from close inspection of these parts. I am printing in 0.15mm layers, 50mm/s print speed and at 210℃ and 45% infill, think that last one can be dropped to 40% That will also help speed up the next print, and I shall do each part separately.
nrml:
You could use epoxy resin to bond the plastic parts to the base. There will be little stress on the plastic and the bonding should be plenty strong enough. You can incorporate a few holes in the design of the printed parts for dowel pins for added joint strength.
Joules:
Cheers nrml, epoxy just doesn't bond to the clean surface of PLA, now printing the parts with dowel holes is a pretty good idea. Will look into doing that on a later revision of this first print. The print is progressing now so see what we end up with tomorrow.
6mm dowel holes now included in base of casting for registration on mounting board (most likely a sheet of aluminium)
Joules:
Half way there.... On the first casting :coffee:
Not so happy with the infill, but this print is VERY rigid. Next part due off the printer in 10hrs.
If it all goes to plan, this should be the internal structure (infill) I will use in all the future prints.
Joules:
A good 10hrs later, second part of the first casting done. Quick clean up, pulling off the support material and push them together for a trial fit.
This is the fit with no clean up. Needle file will knock off some of the small blobs on the mating surfaces.
I won't know how accurate my centres are till I can put some bars in. Theory has it any error should be the same in the next part printed, so hope the centres are equal, next print will confirm that. I picked up my Perspex rod today and the 30mm is a very snug fit in the vertical column. I'm a gnats under on the 25mm, if the hole is elliptical, "Norman" it will get a skim if thats the case.
Last one for now showing the quality of fit and the holes for the dowel pins, they probably will be fitted with epoxy, but more to grout them in than glue. I'm a lot happier in the print quality on this second part. Once this section gets the bars in and welded, I can skim the underside to get them true.
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