jmkasunich: A start with eagle. http://www.electronicsam.com/images/KandT/eagle.JPG
what are the 3 ICs?
gate driver chips
(2 of em anyway)
opto isolator is the 3rd
you put the low side fets on the outside and the high side ones in the middle?
is that odd? is seemed to be odd how ever I did it.
because ground bounce (from L * dI/dT) is more important than noise on Vmotor, I'd probaly put the low side fets in the middle to keep the ground trace short
but I'm probalby just being anal, at low power its not so important
well it is easy to do with eagle. having a fun time with it ;)
and thanks for all your pointer
skunkworks: are you working just from the board, or are you using the schematic editor?
jepler: I am making the schematic - it is pretty easy that way. don't hardly have to think ;)
I can visualize the schematic easier than trying to make the board. Then it is just moving the parts around on the board for the best fit.
(atleast that is what I have done so far)
if this works semi-decent - I will post the board and circuit.
just wondering because you'd only shown the picture of the board
much of eagle's power comes from back-annotation, so you can iteratively develop the schematic and layout at the same time
I chased him away
duh, actually you could do each 8 outputs with a write to the data port and _one_ write to the control port, plus a single write at the beginning
so assuming I can hook up the home switches in hal, how does homing work?
on my machine when I hit home, there is no motion and the world coords just reset to zero.
what do I do different to make it move?
there are params in the axis sections of the ini that tell it how to home
document (well I might add) in emc2_code_notes.pdf
now if I can just find that file
I assume it's in /documents somewhere?
* cradek grumbles about pdfs
[21:21:15] <jmkasunich> http://linuxcnc.org/index.php?option=com_content&task=view&id=5&Itemid=5&lang=en
the "How EMC works" link
whats wrong with pdfs?
they don't have hypertext, for one thing
they're a lousy format for browsing online
homing info starts on page 20
are there any net-friendly vector graphics formats?
for me, the strong point of pdfs is drawings that don't get all pixelated
not really, just rasterized png.
I want 300dpi quality in drawings
but your screen is 75 dpi...
I can zoom
ok so I have velocity=0 which causes the search to not happen
the sign of search_vel is chosen based on which end of travel your home switch is on
so you can home on a limit switch
good, this might just have limits
latch_vel should be less than one encoder count (or step) per servo_period for best accuracy
search_val can be high, the only requirement is that you can stop before crashing when you hit the switch
I don't know if any velocity is high on a sherline...
you can get to 10KHz steps can't you?
btw, I was reading CIA docs today...
there's actually an XML format defined for results from build systems like the farm
but reading the source, it looks like they haven't actually implemented it yet
there are docs? :-)
I sent an email to the author/maintainer asking about it
not really docs
just an XML schema file
hmm, someone else wants arbitrary arcs, that's interesting
hope I didn't just volunteer to do it with my response :-/
I do think we should talk about it though
g-code extensions anyone?
I challenged him to write a spec so we have something to talk about
I was goofing off at work today, made a couple of 32x32 pngs, one green with a check and one red with an X
for the compile farm results table
err, I mean, I think the text is fine
gotta run, be back later/tomorrow