#robotics Logs

Mar 17 2018

04:51 AM Jak_o_Shadows: New extruder installed
04:54 AM Jak_o_Shadows: Ity's got a bloody tiny nozzle
05:03 AM Jak_o_Shadows: .2 maybe? Definitley smaller than my old .4
05:42 AM veverak: rue_bed: you need human slave
06:03 AM weyland|yutani: to build robot slaves?
07:26 AM mrdata is now known as mrdata_
07:27 AM mrdata_ is now known as mrdata
08:58 AM LuminaxHome is now known as Luminax
02:15 PM mikah: hi rue
02:15 PM rue_shop4: hi
05:38 PM ferdna: any recommendation for motor controllers for cnc?
05:39 PM ferdna: i was thinking on this one: http://www.geckodrive.com/featured-products/gm215-step-motor-motion-controller-44.html
05:54 PM Tom_L: gecko are top of the line
05:54 PM Tom_L: leadshine are ok for china junk
05:54 PM Tom_L: 203V is probably the best
05:54 PM ferdna: Tom_L, ohhh
05:55 PM Tom_L: http://www.geckodrive.com/g203v.html
05:55 PM Tom_L: i'm using those on mine
05:55 PM ferdna: ohhh...
05:55 PM ferdna: any differences between the gm215 and g203v?
05:56 PM Tom_L: not sure, the 203v has real good protection
05:56 PM ferdna: oohh
05:56 PM Tom_L: i'm sure the other one is fine
05:56 PM ferdna: the gm215?
05:56 PM ferdna: Tom_L, what else would i need?
05:57 PM Tom_L: for what?
05:57 PM Tom_L: what cnc software are you gonna use?
05:57 PM Tom_L: if linuxcnc i'd get a mesa card
05:57 PM Tom_L: i'm using a mesa 7i90 and 7i47S iirc
05:58 PM Tom_L: works pretty seamless with linuxcnc
05:58 PM ferdna: yes linuxcnc
05:58 PM Tom_L: if you're using grbl then i dunno
05:59 PM Tom_L: they also have ethernet interface which is new
05:59 PM Tom_L: costs a little more
05:59 PM Tom_L: or pcie or pci
06:00 PM ferdna: ohhh
06:01 PM Tom_L: https://mesaus.com/ or http://store.mesanet.com/
06:02 PM Tom_L: both are on irc as well
06:04 PM Tom_L: some use the 5i25 and a daughter card for steppers...
06:04 PM ferdna: ohhh super cool
06:04 PM Tom_L: just depends what you want
06:04 PM Tom_L: over in #linuxcnc
06:04 PM ferdna: Tom_L, i am there already :)
06:05 PM Tom_L: i know
06:05 PM ferdna: Tom_L, what do you use to design your stuff?
06:06 PM Tom_L: i had a parallel port so i went with the 7i90
06:06 PM Tom_L: what do you mean?
06:06 PM Tom_L: i own commercial software
06:07 PM ferdna: ohhh
06:07 PM ferdna: i want to use free open source
06:08 PM Tom_L: freecad
06:08 PM Tom_L: or if you have windows fusion 360
06:08 PM ferdna: linux here
06:08 PM ferdna: Tom_L, do i need to look for anything special when ordering the motor controllers?
06:09 PM Tom_L: are you getting geckos?
06:09 PM Tom_L: i would ask ichguckslive and others over there
06:09 PM Tom_L: he's pretty sharp
06:09 PM Tom_L: german but knows his stuff
06:09 PM Tom_L: i like geckos personally
06:10 PM Tom_L: or pcw which _is_ mesa
06:10 PM ferdna: yes... i am looking forward for the gm215
06:10 PM Tom_L: and jt_shop which has the other store
06:10 PM ferdna: http://www.geckodrive.com/featured-products/gm215-step-motor-motion-controller-44.html
06:10 PM Tom_L: ask them for sure but i see no reason for it not to work
06:11 PM Tom_L: what psu are you using?
06:11 PM ferdna: Tom_L, i havent looked at psu yet...
06:12 PM Tom_L: the auto standby current reduction on the geckos is nice
06:12 PM ferdna: ohh
06:12 PM Tom_L: steppers run cooler
06:12 PM Tom_L: if your driver doesn't have that they will run hot at idle
06:21 PM ferdna: Tom_L, AUTOMATIC STANDBY CURRENT: If enabled, the motor phase current is reduced to 70% of the set value and the GM215 motor switching topology is changed to a low heating recirculating mode. This happens 1 second after the last step pulse is received.
06:21 PM Tom_L: yup
06:22 PM ferdna: Tom_L, i ordered the gm215... i hope they are good enough...
06:25 PM ferdna: so many mesa cards to choose from =$
06:51 PM rue_shop4: ok visitors done
06:52 PM z64555: what you do, throw them out the door?
07:37 PM rue_: they all left
07:37 PM rue_: rounds 1, 2, and 3
07:37 PM rue_: there were 2 other groups of people I got to not show up today
07:38 PM z64555: oh so they left on their own will. ok
07:39 PM z64555: hmmm...
07:39 PM z64555: I might have had a small epiphany why this guy's code wont work
07:39 PM z64555: it's probably not a good idea to store the orientation state of the members as a quaternion
09:04 PM Jak_o_Shadows: Why note?
09:04 PM Jak_o_Shadows: not*
09:12 PM z64555: hm, singularity near zero? We seem to be having trouble trying to attach a PD position controller on the joints
09:17 PM z64555: he's also using an asynchronous update system... which is another issue. The PD controllers in place are derived from synchronous types
09:28 PM Jak_o_Shadows: Singularity near zero? Are you moving in and out of quaternions?
09:30 PM z64555: tbh, I can't tell what all the guy is doing. He didn't document much of his code :(
09:31 PM Jak_o_Shadows: aha. It's good fun isn't it
09:31 PM z64555: Quite. :[
09:33 PM Jak_o_Shadows: Lately I've been mostly been writing maths derived things, so i've tended to write up the maths in a separate document.
09:34 PM Jak_o_Shadows: I mean, include it as well, but it's hard to do some diagrams in code
09:36 PM rue_shop3: ok, well, if it still works, I havn't f***** with it enough...
09:36 PM * rue_shop3 looks around the shop
09:37 PM rue_shop3: hmm, 10% required cleanout is got to be at atleast 15% now
09:55 PM z64555: ok /quit is not the command I was looking for
09:55 PM Tom_L: but it did work
10:09 PM Jak_o_Shadows: Nope, this nozzle is just too damned small, the melt chamber pressure needed is just too bloody high, and the filament path ins't perfect enough
10:43 PM id4rk_ is now known as id4rk
10:49 PM rue_shop3: maybe you should do abs with a acetone disolve system, then you can take the nozzel down to "freaking tiny"