jepler__ is now known as jepler
long time no see(talk)
seb_kuzminsky: my mill now has two 5i20 in it - 4 encoders on one, 1 encoder on the other, and hm2 works right
oh good :-)
I was pleased
but I had to read the man page to see how to install the second firmware!!1!
... it was even right
that sure is flexible now.
it aint pretty but it works ;-)
but why not run all 5 encoders on one 5i20?
probably needs the extra IO anyways
4 of them are on a 7i33, the other is a jogwheel and it was just more convenient physically to wire it to the second card which controls all the other front-panel stuff
yeah the second card is just a bunch of IO other than that jogwheel
also, I learned that opto22 inputs are WAY too slow for a jogwheel
(the wiring consideration, i mean)
[21:07:00] <cradek> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=190336630813
^ the mill has three of these guys now
cradek: what did you do, use jumpers instead of an opto?
yes I used wire - not isolated
ran the wheel off the same pc power the optos run on
it's marked 12v but seems to work on 5
I've wired the resolver board to the spindle but not yet to the mesa
looks like the speed is highly dependent on the I/O module. This list of 4 G4IDC5xx parts ranges from .1ms to 10ms turn-off time..
interesting - would be nice if I could get a couple faster modules for that.
not 100% sure I'm looking at the right stuff: http://www.opto22.com/site/pr_details.aspx?cid=4&item=G4IDC5
-- the fast one is G4IDC5B
I just bought some G4-IDC5D - I'm out
D is middle speed, 1.5ms turn-off time
yeah that's it
hm, maybe if I look through mine I have some fast ones I could shuffle around
I didn't even consider that they might be different
nope I bet mine are all D because they say 2.5-28v on them
seems like you should be OK up to 2.5ms per half cycle = 2 revs/second
but maybe you like to jog faster than that
when I tried it, I had to turn quite slow to get it to count, maybe .5 rev/sec of the wheel
is my math wrong?
too tired to check math
of course, that neglects the rise time of the wheel itself
it sure might be the old light bulb style
is there any way to get more than 4 pwm's on one 5i20 ?
I mean more than 4x(pwm+enc)
you can get 8
the SV12 firmware has 12 servos (each servo is 1pwm+1enc)