#linuxcnc Logs

May 09 2019

#linuxcnc Calendar

02:28 AM pink_vampire: hi
02:37 AM Loetmichel: Jymmm: determining 50 or 60 hz is the hard part. :-)
02:45 AM pink_vampire: ?
04:34 AM Tom_L: morning
04:35 AM XXCoder: yo
05:36 AM jthornton: morning
06:31 AM Loetmichel: pink_vampire: was a response to : [23:57] <jym> Loetmichel's safety training is stinking his fingers across mains lines and determining if it's 110/220/440 and 50 or 60 hz
07:16 AM * Loetmichel just had to clean his desk (new order that has to be delivered scratch free)... not perfect but a LOT better than before... i actually can see the desk again ;) -> http://www.cyrom.org/palbum/main.php?g2_itemId=17370&g2_imageViewsIndex=1
09:20 AM pink_vampire: Loetmichel: look grate!!
01:51 PM AgentWD40: Can anyone advise me on what amperage 24v power supply I would need to run 5x 2A nema 17s? From what little I understand 5x2=10amps is overkill?
01:56 PM jthornton: AgentWD40: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Stepper_Formulas
01:57 PM jthornton: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Stepper_Motor_Speed_Limitations
01:57 PM jthornton: and other pages on the wiki
02:14 PM AgentWD40: Thank you. BigJohnT from the forum right?
02:22 PM miss0r: should any of you guys be interrested, This is the progress of my 2.25l 1972 land rover engine: https://imgur.com/a/IbK97uR
02:24 PM miss0r: and yes. This project has taken me just short of forever already :)
02:32 PM jthornton: yep that's me
02:42 PM AgentWD40: I've got some elementry questions regarding wiring the 7i76e. Do people typically bother to use the stepper driver's enable pin's to turn them on and off with linuxcnc? If so would it be safe to just wire them all in series on one pin?
02:43 PM AgentWD40: I could put a phyiscal switch in line too..
02:50 PM JT-Shop: most stepper drivers have a "disable" pin
02:50 PM JT-Shop: miss0r: looking nice!
02:50 PM Tom_L: pretty sure i wired it on mine but it's been too long to make any bets on it
02:51 PM Tom_L: miss0r what is that out of?
02:51 PM Tom_L: looks awfully clean :)
02:54 PM Tom_L: 47F currently low of 39
02:55 PM Tom_L: one lane open on the turnpike now
02:55 PM Tom_L: no N bound open just 1 southbound
02:56 PM Tom_L: road crews fixing the washed out road
03:14 PM XXCoder: trump jokes with supporter about killing migrants.
03:14 PM XXCoder: it begins.
03:36 PM Connor: Hey guys.. Stupid question.. I have a cheap Micromter, suppose to be rated for "0.0001 and has a Vernier scale around the barrel. I've not used these much.. I mostly use digital.. but, I'm teaching a class and need to cover this. I came across a few odd things.. First, the micrometer only has one 0 so, instead of 0 1 2 3 4 5 6 7 8 9 0 it reads 1 2 3 4 5 6 7 9 0.
03:37 PM Connor: 2ndly.. On some readings, when it lines up perfectly with the 0 on the vernier scale.. it doesn't line up with a mark on the long line on the sleeve scale like one would think.
03:40 PM Deejay: gn8
04:47 PM Tom_L: Connor adjust it
04:47 PM Tom_L: i've got one with a vernier scale also
04:47 PM Tom_L: i don't like it much
04:50 PM Tom_L: the vernier scale would be the 'tenths'
08:58 PM jdh: ours are 0.025" per turn, then the vernier
09:29 PM Tom_L: i think most are that way unless they're mm
09:41 PM jdh: do people use mm for stuff?
10:29 PM Tom_L: not in these parts
10:40 PM roycroft: folks, i have a problem
10:40 PM roycroft: i have a broken tap that i just cannot seem to be able to remove
10:40 PM roycroft: i've never not been able to remove a broke tap before
10:41 PM roycroft: it's a 6-32 tap, so fairly small
10:41 PM roycroft: it's in 3/8" mild steel
10:42 PM roycroft: after about 3 hours of very carefully trying to grind it away with carbide and diamond-coated tooling, i have maybe half of it ground out
10:42 PM roycroft: i even tried heating it up cherry red and punching it out
10:42 PM roycroft: and then reheating it and letting it cool slowly, in hopes that it would anneal
10:42 PM roycroft: any ideas on what to do next?
10:43 PM roycroft: i'm about ready to cut a chunk out of the steel, weld a patch in, and then drill and tap the patch
10:43 PM roycroft: but i'd rather not do that if i can help it
10:44 PM roycroft: if i could source a #35 carbide drill bit i might be able to drill it out - all i have are grinding burrs
10:44 PM roycroft: and they clog up and then chip instantly
11:03 PM calvin is now known as Guest41318
11:16 PM flyback: https://www.youtube.com/watch?v=aF4DkXqNuPU\