On 11/1/22 20:34, John Dammeyer wrote:
From: gene heskett [mailto:ghesk...@shentel.net]
On 11/1/22 17:21, John Dammeyer wrote:
I needed a small PC board. I converted the short drill file .txt over to
G-Code .nc or .tap. Took a few tries to
get it right for LinuxCNC which complained about a few things that MACH3
didn't. Ended up using the CNC
router with MACH3 because the router can do 20,000 RPM while my mill is limited
to 3000. Better to turn
the 0.035" drill bits at higher RPM I'm told.
Eeek!
I don't see but one speed command in that whole file, john, and its only
for table transport.
No spindle speeds at all. In metric, that F5 would similar to a glacier
for speed, or watching oil paint dry.
Take care and stay well
T01
S20 M3
The router is a Bosch Colt and doesn't have speed control other than the dial
on the side. So the S20 is just so LinuxCNC wouldn't bitch with the M3. And
for testing the code on the Mill I didn't really need the spindle going faster
than 20RPM. It will do 1RPM if I want. But on MACH3 it just switches on power
to the Bosch Colt.
This was inches so F5 is 5 IPM. It was about the same speed I'd do with a
0.035" diameter bit using the DREMEL drill press.
Speeds up to the original Z in the G81 are fast as are down to the Z. Then G81
switches over to F5 because the original G81 has a G01 in front of it. The 36
holes were drilled in about 1:15. At least according to the original video
drilling from the wrong side.
It's a pretty kludgy CNC router but it does work.
John
And I think I'm limping with the cheap 6040 mill I've rebuilt. All new
electronics.
Tossed the factory stuff, it was all junk. Made my own B drive.
You can see its latest project on my web page in the sig, it carved
those wooden
screws there are pix of there, with code I wrote. The rest is my
OpenSCAD output.
Without any tool changes its about 2 days to make one of those screws,
with a
1/16" round nosed SC tool good for a .250" DOC. Making lots of very fine
hard maple
sawdust. That is a two start, 12mm pitch, 6mm tooth shape buttress
thread. The remainder
of it except the handle, is 3d printed . Red is plain PETG, Black is
PETG+CF, Blue is TPU
for bumpers. Intended to be vise screws for BIG woodworkers workbench vises.
I could do one tool change and cut that 2 days to one, but 3d printers
are so slow
I'm at least 10 days making the rest of 1 screw assembly.
It keeps me out of the bars. I also work at a pace matching my age of 88.
Take care & stay well, John.
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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