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jes / 3d-metal-printing

Notes and information about 3d metal printing
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Attempt 11: "ring spanner", slower burnout #15

Open jes opened 4 years ago

jes commented 4 years ago

Will use the same profile as in #14, but with an extra couple of hours between 150 and 400.

The model is a finger ring with a 10mm spanner hole in it.

jes commented 4 years ago

Printed 10% oversize in x/y and 6% oversize in z.

jes commented 4 years ago

Will again be using a block at the top to supply filler material.

jes commented 4 years ago

Won't be able to get this done today because the printer nozzle is blocked and I can't figure out how to unblock it. Have tried doing (many) cold pulls, also disassembled the hot end and heated up the nozzle with a blow torch, but can't get it unblocked. Will order a new nozzle, but going on holiday first thing Wednesday morning, so will have to revisit this in a bit over a week.

Want to try approx. half as much filler material as used in #14.

jes commented 4 years ago

Printer fixed & ring printed. I sanded one surface of the printed ring to see if it looks any different to the rest of it after sintering.

Before sinter: Mass of ring: 9.2g Small outside diameter (x/y): 28.5mm Large outside diameter (base to top of flat part) (z): 31.5mm Inside diameter (x/y): 22.8mm Distance across flats (x/y): 11.1mm Inside diameter (z): 22.6mm

jes commented 4 years ago

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jes commented 4 years ago

Total mass of stack-up is 25.0g

jes commented 4 years ago

Just switched this on:

jes commented 4 years ago

It didn't work. Not 100% sure why.

There is still some solid in the bottom of the "funnel" part, but the ring didn't fill in solid around the middle. I'm guessing that the flow path for the extra material got plugged before the ring was fully filled-in.

Perhaps next time we want to try a faster burnout to see if it's any better, or perhaps there's just a physical limitation on how thin the parts can be using this "header material" method.

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