3D printer recommendations

[Enough!Participant @enough]

Posted by Bandersnatch on 03/04/2020 15:57:47:

Yes …. but will it let you "interleave" them as opposed to placing them side-by-side? I must try that with Cura. Hadn't thought of that aspect when I commented.

I did try this and Cura does allow it in both the current (4.5) version and an older (15.04.6) version.

[Tony JeffreeParticipant @tonyjeffree56510]

Posted by Howard Lewis on 03/04/2020 16:48:34:

Tony

You are doing a great job, keep up the good work!

Politicians pontificate;

Engineers produce.

Howard

[not done it yetParticipant @notdoneityet]

Apparently you can make up to 6 in a stack (of the Prusa design). I’m trying one on a raft tonight as this afternoon's effort came loose from the bed at about 5 1/2 hours (of 6 1/2).

Says 17 hours for a stack of four, I think. I expect that is subject to shortening a bit by the 3D printing experts?

[Tony JeffreeParticipant @tonyjeffree56510]

I've printed 9 today, no raft, direct onto the Ender's heated glass bed. I'm finding that mostly they stay stuck, but release by themselves as the bed cools at the end of the job. Only one failure – one of the arms came unstuck and there was no option but to abort the print. The first one I printed onto a raft but it took twice the material and twice the time, and parting it from the raft wasn't clean or easy.

[not done it yetParticipant @notdoneityet]

The one I did earlier (from the other thread) was reasonably quick and did not need a raft. It is just that if I am going to make a whole batch of these, in sets if six at a time, I don’t want any mishaps if I can avoid them. They take 55g of plastic each.

I will revert to a simpler/quicker design if they are approved for NHS use (somewhere!).

[Neil WyattModerator @neilwyatt]

I'm printing the Prusa design in about 1 hour 20.

Got stuck at 12 because after a filament change they kept coming loose on the right, I've just (finally) realised I broken a connection for the right hand built plate fan, shows how important those tiny fans are!

Neil

[Ronald MorrisonParticipant @ronaldmorrison29248]

Posted by Tony Jeffree on 03/04/2020 23:21:14:

I've printed 9 today, no raft, direct onto the Ender's heated glass bed. I'm finding that mostly they stay stuck, but release by themselves as the bed cools at the end of the job. Only one failure – one of the arms came unstuck and there was no option but to abort the print. The first one I printed onto a raft but it took twice the material and twice the time, and parting it from the raft wasn't clean or easy.

I've occasionally had trouble with a print coming loose from the bed too. I increased the extruder temperature by 5 degrees and the problem seems to be solved. With a glass bed the surface needs to be cleaned with an alcohol solution sometimes too. It's easy to touch it with your hand when you remove a print and transfer just a little skin oil.

[Former MemberParticipant @formermember32069]

[This posting has been removed]

[Tony JeffreeParticipant @tonyjeffree56510]

Posted by Ronald Morrison on 04/04/2020 10:27:44:

Posted by Tony Jeffree on 03/04/2020 23:21:14:

I've printed 9 today, no raft, direct onto the Ender's heated glass bed. I'm finding that mostly they stay stuck, but release by themselves as the bed cools at the end of the job. Only one failure – one of the arms came unstuck and there was no option but to abort the print. The first one I printed onto a raft but it took twice the material and twice the time, and parting it from the raft wasn't clean or easy.

I've occasionally had trouble with a print coming loose from the bed too. I increased the extruder temperature by 5 degrees and the problem seems to be solved. With a glass bed the surface needs to be cleaned with an alcohol solution sometimes too. It's easy to touch it with your hand when you remove a print and transfer just a little skin oil.

Indeed…I put my one failure so far down to that – cleaned the bed down with Meths and it has been fine since. I am taking care not to touch the bed when removing parts now.

[Steve Skelton 1Participant @steveskelton1]

Nowadays I only tend to print with ABS+ on a glass bed and find that if I paint the bed (when cold) with a dilute solution of ABS dissolved in acetone that I get no problems at all with adhesion (or lifting) without the need for a raft or anything else.

As the things I print are generally exposed to water and need to be quite tough I find ABS+ to be the best medium.

Obviously the need to clean the bed with acetone is required occasionally if the layer builds up to much on the bed. I also find that using a bed temp of 110deg C to be best.

Steve

[Enough!Participant @enough]

BTW Tony, your dropbox links don't work for me either. It says the folder doesn't exist and then drops me back to my own dropbox folder.

[Tony JeffreeParticipant @tonyjeffree56510]

Posted by Bandersnatch on 04/04/2020 17:12:07:

BTW Tony, your dropbox links don't work for me either. It says the folder doesn't exist and then drops me back to my own dropbox folder.

Thanks – will take a look.

[Tony JeffreeParticipant @tonyjeffree56510]

Try this:

https://www.dropbox.com/s/l93f2cwpkpqyxo0/Visor_frame_EUROPE_80mm_4hole_v1.stl?dl=0

https://www.dropbox.com/s/s3n2dr50bf9mrog/Visor_frame_EUROPE_ISO838_v3.stl?dl=0

[Enough!Participant @enough]

Thank you, Tony. That worked a treat!

[Tony JeffreeParticipant @tonyjeffree56510]

[Neil WyattModerator @neilwyatt]

Posted by Barrie Lever on 04/04/2020 10:29:45:

Neil

What basic settings are you using on that Prusa part?

Infills, feed speeds etc.

B.

10% infill, 120mm/s infill speed, 80mm/s walls, 0.3mm layers, 1.2mm wall thickness, 1mm top/bottom thickness.

No support or adhesion.

Other settings are probably a bit machine/filament specific, but I'm using 200C filament and 60C build plate with PVA coating on borosilicate glass, buildplate fans on.

Neil

[Author]

Posts