rayh is now known as rayh_away
so what happens if you're cutting a thread and you hit pause?
I guess that's a bit rhetorical, because I know what happens - it ruins the work
I ask because currently if you hit pause, it doesn't pause until after the thread is done
I wonder if that's a feature.
ok, nobody has said no in five minutes, so I declare it officially a feature
That is one good way to handle the problem
which? not pausing, or feature declaring?
not pausing during the cut.
I was talking to a lathe guy this morning
I think so too; it seems like you would NEVER want to pause then.
the fanuc will jump out of the thread in x if pause.
can it resume then?
but I don't know how you would continue after that
I'll ask tomorrow morning.
you'd have to back up a bit, or maybe just start that cut over
we declare it a feature for now.
I'm dying to try this - the plots look good, but I can hardly believe it until I see it cut
Fantastic. I've got a couple of fanuc post threads coming.
Right. I'll order that encoder tomorrow.
I think the groundwork for more complex canned cycles is done; you can do a series of cuts while synced now
I've got an encoder coming for my mill too, but I'm not sure how well that will work out compared to a real lathe.
if I had spindle reversal, I bet I could pull off rigid tapping.
I've got a set of pmdx stepper drives and a power supply so I should be able to put the lathe together pretty quick.
do you have the sherline motors and mounts?
That will be something to test out on the Mazak.
Yes. It's a full cnc ready lathe.
anything bigger than me scares me...
I'd rather break some little 4-40 taps first!
You'll get used to it pretty quick when you get next to the Mazak.
it already has reversal?
euuu those break really easy. If you could run one of those in a 1/2 inch deep hole that would be an awesome demo.
what diameter of hole? hahaha
Yes the mazak has full speed control with tach and encoder feedback.
I figured you'd cheat it.
hole size that is.
how big a tap do you need before you can tap (say aluminum) without periodic reversals? I always reverse constantly when doing it by hand - they get stuck so easily otherwise
maybe #10? or 1/4?
(without cheating - real 60% threads)
I tap 6-32 with a battery drill with no reversal except at the bottom.
alum is harder than mild steel
in the recommended hole size?
need some good tapping gel.
yeah maybe my lube is not very good. I use whatever's handy.
alumicut is ok, but I've been known to use motor oil
I'm seeing a difference between hal variables and ini variables.
what do you mean
like axis scale is 4000 in ini and 4000.0 in a hal return.
I guess that's not too surprising
I've a notion to simply write all of the hal read ini variables with the hal value.
I doubt that will hurt anything
Okay. You twisted my arm.
I'm nearly finished with emccalib.tcl but won't complete until morning now.
I haven't had a look yet - can it be run now?
Sure. You will have to change the permissions of emc2/tcl/bin/emccalib.tcl to a+x
Turns out all of those files were sources rather than executed.
The latest sf version will change values and let you revert to the last value but not save.
I don't get a window...?
chris@buster2:~/emc2.head$ chmod +x tcl/bin/emccalib.tcl
(with emc running)
I've only run it from the tkemc menu. That might be the difference.
Let me look
might need some kind of environment
"exec $TCLBIN/emccalib.tcl -- -ini $EMC_INIFILE &"
is what I use from inside tkemc
ok got it (added support in axis)
I don't have many options with my stepper setup
you should see three.
it's a little too bad we can't change maxaccel/maxvel
I've tested with m5i20, univstep, univpwm, and the stepper versions.
allowing changing HAL_MAXVEL is misleading because it won't work when changed
same with SCALE, I guess
If there were a way to get at those emc global variables I believe we could.
PID is different, it is implemented in hal, so you can tune online
I read all of the setp lines in the hal files that read from the ini.
ah, I see
So changing them and re issuing the setp should make HAL run by the new value.
since we have bwidget, you could use a real tab widget instead of these pseudo-tabs
I've not tried that.
I thought about that but this was easier.
I think it would be more evident how it works, for the user who walks up to it for the first time
It was code I had elsewhere.
I'll look at that in the morning.
I'm sure that's something we could do in the "second pass"
Yep. Nothing is sacred.
more important to get it working than make it pretty at first
I'll have a servo powered sherline mill hooked up tomorrow.
That will be my test.
neat, how do you do that?
m5i20 with their 7i?? four axis 100 watt interface card.
that's one of the new pci cards?
right. $300 for the two cards.
other than the two cards what is needed?
(I'm looking forward to seeing this kind of hardware at fest)
a power supply <48 volts
and +5 for the encoders.
wow, that's an inexpensive setup then
I got some surplus pittman motors.
Roltek made me the motor mounts.
they had 1/4 inch shafts so that fit as is.
your sherline has acme screws?
No they are sherline's own threads.
oh really, I didn't know they did their own thing
1/2 20 nominal for x and y and 3/8 in z
looks like allthread
oops 1/4 20 for x and y
20 is a lot of threads per inch - what rapid speed do you think you can get?
They also make a metric thread version.
yeah mine is metric (1mm pitch)
I set up one for Abdul (vital) and he was getting 125 ipm.
for 6" travel that's pretty darn fast
thread would last about a day if you ran it hard.
and the x would whip when it was at one end.
The stepper version from sherline runs bout 22 ipm with their little motors
That's fast enough for the newbee.
yeah, it seemed pretty slow, but fast enough
I get 30 on my hodgepodge mill and am happy enough
I can only cut pcbs at 20-22 so 30 is fast enough
I'm running 36 here with emc2 but that is about all the motors will torque.
The Smithy 1240 rapids at 180
their spindle is really slow - so you have to cut slow anyway
but that is rutex running 500 watt motors.
Yes it is but the speed is nice for rapid return to home.
yes or sloppy gcode (automatically generated) with lots of rapids here and there
They have talked about getting a single speed spindle to fit in the block.
10k or so?
I seem to remember 6k or so
many of their customers are engraving with it.
motorcycle rims and such.
wonder how fast their current spindle goes
3k i think.
that's way too slow for any small tools
my pcb tools "require" 20krpm
I've used them at 10k but they work much better at 20k
I would think all engraving tools would be the same way
Certainly seems like it.
hey I should photograph my stepper driver board before I solder it
in fact I'm going to go do that.
You bet. Put it on the wiki.
got a quick question about saving ini files after calibration.
We don't want to get into the diff stuff that emc did.
but should we save one backup?
name it xxx.ini.bak and it won't show on picker
name it xxx.back.ini and it will.