On 12/3/22 23:15, Chris Albertson wrote:
a huge printer is not as usfull as you might think. The nozzle is still
0.4 mm in diameter or close. Print time is the cube of the linear
dimension of the parts you make, Can you wait a week while the printer
runs. What if a 1Kg spool of filament is not enough?
Chuckle, one of the reasons I leave the bowden tube even after putting
the ejector motor on the head, then I can follow the last of a spool
thru it until the ejector grabs the new spool. I've also chased the
prusa head and fed it a new spool many times.
I got an idea, see what Cura says. Define a printer that large and slice
something and look at the weight and print time.
I did that for a 6 pack of vise housings on the ender5+, 21 days, but
the y motor lost home when the infill started, 8 days into the job.
A more practical idea is to print the parts in sections and then glue or
screw the parts together. It helps if the parts have some kind of self
alignment or keyway.
I do that with these housings, they are assembled with butterflys.
or huge parts, casting is better. Print a mold, then fill it with plastic
resin that is mixed with chopped fiber. It makes really strong parts.
Then disassemble the mold and take the part out.
A big printer is no different at all from a milling machine, except that it
moves faster and does not need to be build as rigid as there is not cutting
force. So why not look up some CNC router projects? It is a common
LinuxCNCproject.
I have a 6040 with totally new electronics. Its custom setup to carve
the vise screw from hard maple and these printers will be used to make
the rest of the assembly.
I would still use those closed loop steppers. With a week-long print, you
do not want skipped steps.
Which is why I asked stepperonline for a quote on their nema-17
stepper/servo with double shafts.Take care and stay well Chris
Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/>
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