Glenn R. Edwards wrote:
Jon,
Are you implying that you manually, or otherwise, get the table to within
one encoder revolution of home and then do a homing sequence with EMC?
No, EMC2 searches at a moderate velocity for the home mechanical
switch to close, then backs off and retries at a
AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] How to set certain AXIS settings to defaults?
Gary Fixler wrote:
One of the reasons I often drill a useless hole someplace at the
start of the
project, and write my code with that as the 0,0,0 point. That makes
Hey Gary,
Glad I could help. I found that the information I needed to learn Python was so
scattered out that it took some time to bring it together. New Mexico Tech has
about
the best tutorial you can download that I found on Tkinter...
John
On 25 Mar 2008 at 19:03, Gary Fixler wrote:
That must be a mighty small mill or very dull cutter... What SFM and chip load
are
you running at? I don't have my charts here but from memory 6061 needs to be
cut
at 300-500SFM. I normally use a two flute end mill for aluminum. For a 1/4 2
flute
end mill I cut at 2500 rpm and 10 IPM again
How thick is the oxide layer? Doesn't it self seal the surface as fast as the
oxide
layer is formed? I guess that's why deeper cuts work better than skim cuts on
aluminum?
A while back I was peck drilling 6061 and came across an article on drilling
aluminum. Now I drill up to 4*d at 11 IPM.
On Wednesday 26 March 2008, John Thornton wrote:
That must be a mighty small mill or very dull cutter... What SFM and chip
load are you running at? I don't have my charts here but from memory 6061
needs to be cut at 300-500SFM. I normally use a two flute end mill for
aluminum. For a 1/4 2 flute
On Wednesday 26 March 2008, John Thornton wrote:
How thick is the oxide layer? Doesn't it self seal the surface as fast as
the oxide layer is formed? I guess that's why deeper cuts work better than
skim cuts on aluminum?
Yes. Thickness depends on time oxygen availability. Bare, about .0001
Hi Gene,
Two fluters work well for slotting or anyplace you have trouble
getting rid of the chips.
The harder the Al the easier it makes good chips. 6061-T6, 7050-
T651, 7075-T651 are good choices.
Recutting of chips that don't get out of the way generates lots of
heat and more mess as well
It was on practical machinest. I can't find it at the moment, I think I have a
link at my
machine shop...
Also there is a really good chart here
http://www.precisiontwistdrill.com/techhelp/help_pages/jobber_length_amg.asp
John
On 26 Mar 2008 at 11:10, Gene Heskett wrote:
Interesting. Do
Gene,
I use threaded shaft collars a lot with good success. From McMaster Carr look
up
6438K18 to get the page number. They come in metric and inch and don't move
once you set them...
John
On 26 Mar 2008 at 10:56, Gene Heskett wrote:
What I'm blaming on wear is now found to be the nut on
On Wednesday 26 March 2008, John Thornton wrote:
6438K18
Which leads me to the 2305K13, for 6mm threads. Very good idea except its
buried inside my coupling and in-accessable, either to tighten it on the
shaft, or to tighten the lock screw. However, I am considering slitting the
existing
On this page you can find the thing you seek.
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Simple_EMC_G-Code_Generators
Wow! I've been learning Python lately for my job, which will entail creating
UIs, and such, and I'd been planning to build some things like this. I have
a notion about how
On Tuesday 25 March 2008, Gary Fixler wrote:
One of the reasons I often drill a useless hole someplace at the start of
the
project, and write my code with that as the 0,0,0 point. That makes
getting
back to within a couple thou a bit easier.
That's a great idea. I would love an absolute
In Axis you can kinda somewhat. You can't add a menu item but you can put
the .py in your nc directory and do a file open. You have to add a line to your
INI file to enable this feature.
On this page you can find the thing you seek.
[TRAJ]
DEFAULT_LINEAR_VELOCITY =
DEFAULT_ANGULAR_VELOCITY =
Interesting. I don't have DEFAULT_LINEAR_VELOCITY, but I do have
DEFAULT_VELOCITY, which seems to be the same. Has the name changed, or does
EMC accept either?
I had been skipping over those ini values, because they're wildly
On Wed, 19 Mar 2008, Gary Fixler wrote:
The ini file should be IPS, whereas EMC's sliders show IPM. That's why I
was getting in the 1300s in EMC for my DEFAULT_VELOCITY = 22. That
doesn't explain why it's 1312 in EMC (22 * 60 = 1320), but at least it's
close, and I can set more realistic
ben lipkowitz wrote:
The hissing noise is due to 'noise' believe it or not. Check your setup
for ground loops and capacitive coupling and all that good stuff. Or maybe
you should just buy some stepper drivers of higher quality.
I think Ben is being overly critical here. Xylotex drives do
On Thursday 20 March 2008, Gary Fixler wrote:
[TRAJ]
DEFAULT_LINEAR_VELOCITY =
DEFAULT_ANGULAR_VELOCITY =
Interesting. I don't have DEFAULT_LINEAR_VELOCITY, but I do have
DEFAULT_VELOCITY, which seems to be the same. Has the name changed, or does
EMC accept either?
I had been skipping over
The ini file should be IPS, whereas EMC's sliders show IPM. That's why I
was getting in the 1300s in EMC for my DEFAULT_VELOCITY = 22. That
doesn't explain why it's 1312 in EMC (22 * 60 = 1320), but at least it's
close, and I can set more realistic values now. Awesome.
This granularity
I think Ben is being overly critical here. Xylotex drives do produce a
hissing sound from the motor. It is a result of the type of PWM used by
those drives, and it is normal and totally harmless. It does NOT
indicate any kind of problem that you need to worry about.
Thanks, John. I
It's also just occurred to me that I could leave the PC, and driver box
on,
and just unplug the motors until I'm ready to go again. I'm not sure how
bad
that would be for the system. My thoughts turned toward things like
back-EMF.
And that will u$ually break the mirror and let the $moke
On Thursday 20 March 2008, Gary Fixler wrote:
It's also just occurred to me that I could leave the PC, and driver box
on,
and just unplug the motors until I'm ready to go again. I'm not sure how
bad
that would be for the system. My thoughts turned toward things like
back-EMF.
[...]
And
Anyone know how I can change the default jog speeds (linear/rotary) in AXIS?
It always starts up in the thousands, and when I [often] forget, I end up
jogging fast enough to lose steps, which has screwed me up a few times. It's
also a pain to have to slide them way down each and every time I fire
23 matches
Mail list logo
