Yet another project - sorry
Re: Yet another project - sorry
Hi Steve
Just out of interest, are the wheels filament printed? How much of the chassis/mechanism is printed?
Rik
Just out of interest, are the wheels filament printed? How much of the chassis/mechanism is printed?
Rik
- -steves-
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Re: Yet another project - sorry
Hi Rik
A brief brief run do, most things are 3D printed including the wheels and cranks.
Things not 3D printed are as follows as best I can remember:
Motor
Nylon gears
Silver steel axles
Brass axle bushes
Brass washers
Steel bolts for cranks, crossheads etc.
Piston rods 2mm piano wire
Brass sleeves inside pistons for above
I think that about covers it, everything else either from FDM printer or resin printer, depending on detail required.
The buck stops here .......
Ditton Meadow Light Railway (DMLR)
Member of Peterborough and District Association
http://peterborough.16mm.org.uk/
Ditton Meadow Light Railway (DMLR)
Member of Peterborough and District Association
http://peterborough.16mm.org.uk/
Re: Yet another project - sorry
Do you have to turn the wheels on a lathe after printing or are they usable straight off the printer?
Rik
Rik
Re: Yet another project - sorry
Thats what I was wondering as well. I find that the wheels print circular enough, both resin and filament, but getting the axle bore to print accurately is next to impossible and trying to drill/ream/file by hand is highly unsatisfactory.
Philip
- -steves-
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- Posts: 2440
- Joined: Thu Jul 28, 2011 1:50 pm
- Location: Cambridge & Peterborough
Re: Yet another project - sorry
I use a 3mm axle and use a 3.1mm hole through the wheel in CAD. As things always change size on printers, I have found this to be ideal and a 3mm hand drill bit just takes off a tiny amount, not enough to make it run un-true and 9 times out of 10 leaves me with a perfect running wheel. I have found that even some manufactures of wheels, you still get one with a wobble now and again, so I am happy enough with a minor wobble if it happens, if it's too bad I just print another wheel.
The buck stops here .......
Ditton Meadow Light Railway (DMLR)
Member of Peterborough and District Association
http://peterborough.16mm.org.uk/
Ditton Meadow Light Railway (DMLR)
Member of Peterborough and District Association
http://peterborough.16mm.org.uk/
Re: Yet another project - sorry
Thanks Steve, thats virtually exactly what I do (try to do) even as far as using the 3.1mm bore to allow for distortion, but try as I may I cannot get them to run true with using the 3mm handdrill. I had a clear up this morning and threw out 15 unsatisfactory wheels from my last two projects and I know I've already chucked some more along the way.
Philip
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