I wouldn't use PLA for rockets (yup I know people do) it is pretty low
temp and brittle compared to other materials. Low temp like deform in
the car in the sun low temp. PETG is pretty easy to work with (easier
than Nylon, no stink like ABS) , and relatively cheep. I have been
buying the Esun PETG from Amazon or the pro stuff from Matterhackers.
Both process well.
Esun, PETG 245C NO FAN, 80C bed temp.
Despite what you hear, the PETG does like to be dry when you use it.
Just keep the rolls in a plastic bag with desiccant when you are not
using them. I have a large desiccant cartridge and a plastic container
that holds 4-5 rolls works well. If the material has been sitting
around it hurts the mechanical properties.
Mike Kramer
On 4/10/2020 11:05 PM, Rob Hoegee wrote:
I use the Hatchbox brand for my Ender 3. Amazon has good prices. I mostly print PLA unless I need something stronger with more heat resistance, then I’ll use PETG. I haven’t printed ABS on it yet.
On Apr 10, 2020, at 8:15 PM, Rick D. <rocketrick@xxxxxxxxx <mailto:rocketrick@xxxxxxxxx>> wrote:
Thanks, everyone!
It sounds like the Creality Ender 3 Pro is a great fit for what I am looking for, and at only $229, with free shipping, I can't complain that it breaks the bank. I think I'm going to order one unless I hear a convincing argument that I should be looking elsewhere....
Once I get the printer, is there a preferred vendor for filaments?
The Ender 3 Pro says it supports a bunch of types of filaments -- is there a particular type of filament that's best for rocket parts? Someone mentioned using ABS instead of PLA, which seems to be the most common type.
Thanks again!
Rick Dickinson
On Fri, Apr 10, 2020 at 6:30 PM Mike Riss <dmarc-noreply@xxxxxxxxxxxxx <mailto:dmarc-noreply@xxxxxxxxxxxxx>> wrote:
Rick,
Can' offer any advice on printers, but if you haven't checked it
out, the "3-D Printing and Related topics" section on The Rocketry
Forum has a decent amount of info and links to lots of stuff you
can print.
Mike
On Friday, April 10, 2020, 12:42:52 PM PDT, David P Smith
<dmarc-noreply@xxxxxxxxxxxxx <mailto:dmarc-noreply@xxxxxxxxxxxxx>>
wrote:
I do most of my stuff on a Da Vinci Mini. It works well, but I
don't recommend it or anything else from XYZ Printing. They have
an NFC chip in their proprietary filament spools and will do
nothong without it. (I have heard of people with certain skills in
bypassing such things, but it is an additional hassle.) It is USB
and WiFi, but I haven't used the WiFi.
The 150x150x150mm print volume is big enough for almost anything I
have printed. Occasionally there is something bigger that I want
to print, but most "standard" size printers are about 200x200x200,
so it isn't that much larger.
It takes a bit of fiddling to learn how to design your own stuff,
but it is no more difficult than learning most things. There is a
learning curve, but it is not rocket surgery...
Dave
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On Fri, Apr 10, 2020 at 2:54, Rick D.
<rocketrick@xxxxxxxxx <mailto:rocketrick@xxxxxxxxx>> wrote:
I know that quite a few ROC members have 3D printers, and that
there are a ton of options out there. I'm thinking of buying
and/or building one for myself, and am looking for advice.
What models currently give the best bang for the buck? I'm
thinking of using one to make small project enclosures for my
own electronic projects, as well as altimeter sleds for
rocketry use, similar to the ones Mike Kramer designed (and
I'm sure lots of other cool uses will present themselves as
soon as I have one).
I'm looking to spend as little as possible for a useful
machine I won't immediately regret buying. If there are "must
have" features, or common problems that are solved by slightly
more expensive models, I'd like to know that....
Basically, with all the collected experience of ROC members
doing 3D printing, I'd like to know what machines you wished
you had bought when you were starting out, instead of what you
did buy. Help me learn from your initial mistakes....
Thanks in advance,
Rick Dickinson
