but the mind spec implies they thought it through
Oh they did - they know it will do everything they can think of
to be fair, they know what they want .. its just communicating it is sometimes optional
thnakfully htey always *love* what I do for them :)
and you can do quite funky tings with Java :)
that's better the some of the clowns I've dealt with
yeah, i can imagine
I've looked at Java but it seems to slow for realtime calcs
oh it is ..
Might redo the interface is Java tho
this isnt motion stuff thank $deity
I'm trying to configure an .ini for a QueMonster(tm) machine
The rotary axis is giving me trouble
I'm using the BDI 4.14
Check my thinking: Gecko/stepper/worm setup
63:1 worm drive
200 step/rev stepper with /10 microstepping
= 350 counts/degree?
Plus, is there no way to jog an A axis in tkemc?
hold on until I get back to work
* anonimasu yawns
* alex_joni is freaking tired
did I miss anything these days?
* alex_joni goes home
I tried milling my part today..
it failed.. :/
the z axis didnt go where it was supposed to..
it went just fine..
then when drilling a hole with the endmill.. it just didnt come back up far enough
then it's kinda ok ;)
just a endmill earlier due to the same problem..
I ordered 5 new ones..
maybe lost some steps on z?
yeah, but I have no clue on why
I was running really slow..
too much accel?
need to put it through some tests
but I think it might be the case that the endmill gummed up and stuck in the plastic..
I am going to give it another shot tomorrow night
hmmm.. could be
I'll try to machine it in foam instead of in plastic..
to see if it does the same under no load conditions
* anonimasu hates steppers
they are scary.
why is that?
didn't you say you had g340's ?
you never know if you loose steps until you hit the table..
yeah but as long as they get pulses they move to the commanded position
while, I never know if the stepper dosent go..
or if it's stuck/ferrors
you have steppers too?
at the Z axis..
on the Z :)
does it hold position?
one of my geckos gecko died..
I dont have a ballscrew there yet
so it's spring loaded..
It seems to hold the position very nicely
how about moving it with your hand?
no problem with that
moves without too much force
the accel is 1.2 ;) at the axis..
it's really strange :)
got some pictures?
of the mill?
then you should take some ;)
I am too ashamed of my motor mounts ;)
they look like crap
I'll redo them once th boaring head appears
you can machine those later ;)
send me some pics.. I can't complain (I don't have a running mill.. sooo...)
dont have any yet
and no cam right now either
* alex_joni grabs a night-snack :)
too long day, today
* robin_sz watches tumbleweed blow across the channel
Anyone here use a rotary axis with EMC?
Ive heard 'odd' tings about ti though
asdfqwega: cradek has in the past
I don't remember what the problems were .. doesn't work at all with segmentqueue, I know that
ISTR it had some strange behaviour regarding interpolation
I'm trying to use the current BDI with one
I'm just going to use it as an indexing head
what would be the disadvantage in pretending its a linear axis
hm, not having your cam program working?
and just having '360' be one full turn, although the CNC will think its 360mm?
Trouble is, my counts/degree is 350 - and I think that low a number is causing problems
pretending to EMC its linear, but the cam its rotary .. I mean, emc will just do the right thing surely?
robin_sz: That might be a temporary workaround
I dont know :)
but well, rotary should work anyway
yes it should
try it :)
I will later on
but my Z is loosing steps right now..
its *losing* steps
but I have no idea for what reason it is losing stepps.
sorry, you just triggered my losing/loosing per hate :)
Listen to robin, he knows what he's talking aboot
* asdfqwega is part Canadian
I have no idea why it's loosing steps though.. might be because the plastic gets gummy when trying to drill with a endmill..
should be plenty of force really
accels too high?
heh 1.2 in accel..
sppeds too high?
like 100mm/min max..
460 I think..
460 hz max?
460pulses per mm.
* asdfqwega is off to see the Wizard - who makes pool queues
so 46000 pulses minute .. less than 1khz so no prolem with rate then
could be pulse shape t the drive, checked for ripple and hum on the step/dir inputs?
no I havent but the other axis:es works..
there's nothing different with the wiring of that axis..
the axis have been running fine before..
although I've never milled anything other then foam..
well, 460 pulse per mm ...thats into a 10:1 microstepping drive?
I have a stepper on z since my servo driver broke..
G201 is 10u stepper
err yeah its err
g210 is it..
but thats a non ustepping drive .. 1 pulse = 1 motor step isnt it?
it's a microstepping drive...
1 motor turn = 4mm roughly?
I dont have the gearing
I measured until it went 0.01
I havent converted the axis to ballscrew yet
you have no idea what the pitch of your Z axis screw is?
g210 can do ustepping..
if you bypass the 901 board yeah
the only diff is that g210 has a pulse multiplier..
but liek who pays for a 901 board, then bypasses it?
it's a jumper..
it's just ~37$
well, next time you have $37 spare, send it to me ;)
heh no way..
I paid $120 for the shipping of my 3 geckodrives.
so 46 real pulses per mm
no ... 46 motor steps per mm
let me check..
all im trying to do is work out roughly you Z axis force available
I suspect its large compared to the effort of cutting plastic
the motor torque is about 1nm
do they sell them that small?
or maybe 2..
2 is closer to useably I guess
I have a mess in my head with numbers..
1nm on a non-ballscrew ... could be friction
nah.. it's geared..
now he tells me ;)
roughly how geared? 4:1
first to a 4:1
then onto the machine where the unknown gearing is..
it's way too much torque to stall the axis by hand..
id consider redcuing the accel maybe
my servos has less torque then the stepper..
and the table moves me then I try to push aginst it..
1200mm/sec^2 might be a bit high with that gearing
the z axis wont see that kind of speed.. :)
hm.. so my accel is too high?
sounds like it might be
0-100mm min at 1200 mm/sec^2
what'a good typical value?
thats 0-1khz in 0.1second
* anonimasu stashes money for a vital card and new drives
servos are neat.
fiddle the accel values until 0-fullspeed on your Z is around half a second or so maybe
what's a good maxspeed for Z?
sigh .. depends on machine and gearing :)
sorry about asking lots.. but I have no idea how fast it should be
try slowing your accel, smooth things up a bit, see if that cures the missing steps
yeah I'll do that
I'll test mill in foam tomorrow.. so it'll be no big deal if it breaks..
a stepper should spin to a couple of khz in real steps, 20Khz usteps
but emc has issues with high step rates
yeah I noticed..
10khz into a ustepper is a fair compromise
it ferrors at about 500mm/min..
nbto quick huh?
I suspect you are overgeared maybe
stepper spining hard, machine barely moving?
oh, it does that on all axises..
I think emc fails to crank out enough pulses.. :)
and it ferrors because of that.. even though I have no feedback to emc..
I am kind of curious if I should buy a vital card or a g2002..
it'll have to wait though bought a vise a couple of days ago..
and I am waiting for my boaring(however you spell it) head to arrive
a boaring head would be something to do with large wild pigs :)
not that it really matters, we know what you mean, but I guess you like to know the correct spelling maybe?