#garfield Logs

Oct 02 2012

00:49 rue_bed iamturnip, I hear cliff brought by his power adapter
00:50 rue_bed touch base sometime, tell me how things are
13:43 katsmeow-afk Tom, we mentioned PHP being slow, here's tests vs other languages , note PHP is the slowest language tested : http://openeuphoria.org/forum/119186.wc#119186
20:48 Tom_itx katsmeow-afk?
20:49 Tom_itx i got a puzzle to try to figure out if i can solve
20:49 Tom_itx http://tom-itx.dyndns.org:81/~webpage/cnc/Lathe/
20:49 Tom_itx the gear chart and gears on my lathe
20:50 Tom_itx it shows down to 8 tpi threads but i need to see if i can figure out how to get 3 tpi threads
20:50 Tom_itx if at all possible
20:53 Tom_itx funny, i've never messed with the gears all these years i've had it
20:53 Tom_itx but now i need to
21:21 katsmeow-afk 3 tpi? making hold-up-the-house allthread or ballthreads?
21:26 Tom_itx yes
21:26 katsmeow-afk two ways to make it do 3 tpi, the right way and the less right way
21:26 Tom_itx 1.5" by 3 tpi
21:26 Tom_itx i just need to get it done
21:26 Tom_itx quick and simple
21:26 katsmeow-afk can you make a new set of gears for it?
21:26 Tom_itx oh, the material is wood
21:26 Tom_itx no we're not going down that road
21:26 katsmeow-afk oh, quick and simple won't do it
21:27 Tom_itx it's for something 150 yrs old
21:27 Tom_itx likely more
21:28 katsmeow-afk if you aren't going to make gears for it, it might be faster to make something for the mill to do it
21:29 Tom_itx i don't see how i could or i would
21:29 katsmeow-afk drive a stepper to rotate the bar, then rotate the table stepper 1/3 that, have the mill cut the slot
21:29 Tom_itx it may be impossible
21:29 Tom_itx i don't have a rotary axis or time to make one
21:30 Tom_itx i wish i did
21:30 katsmeow-afk the easy way to make the lathe do it is to pull the reverse gears temporarily, set in a 2:1 ratio there, and set the existing gearset for 6 tpi
21:30 katsmeow-afk don't need a rotary axis
21:30 Tom_itx just a sec
21:31 Tom_itx http://tom-itx.dyndns.org:81/~webpage/cnc/Lathe/thread.jpg
21:31 Tom_itx i gotta make that
21:32 Tom_itx but
21:32 Tom_itx the bottom half will be just a smooth dowel
21:32 Tom_itx with threads on the top half
21:33 katsmeow-afk oh, make a copy jig for the lathe, don't use the gearset on it
21:33 Tom_itx it's a metal lathe
21:33 katsmeow-afk then follow the bottom of the thread on that dowel
21:33 katsmeow-afk so?
21:33 Tom_itx i'm not seeing it
21:34 katsmeow-afk on a coppy jig, you can follow the top or the bottom of the "worm" on that down, since you do not have the top of the teeth, you follow the bottoms, which you do have
21:35 katsmeow-afk so follow the bottom, but se to cut real shallow, whatever your lathe can cut smoothely, i'd even chuck a dremel in the toolpost for smoother cutting
21:36 katsmeow-afk then make repeated passes cutting deeper at the toolpost, while you follow the bottom of the same damaged thread on the copy jig
21:37 katsmeow-afk stop when the root dia is the same on the original vs what you been cuttng on int he lathe, then use a file (or the dremel) to taper/deburr the teeth as needed
21:37 Tom_itx i gotta cut that out too, it's glued in
21:37 katsmeow-afk oh
21:37 katsmeow-afk no
21:37 Tom_itx i don't follow how to make the jig
21:37 Tom_itx i'll either figure out a way or do it differently
21:37 katsmeow-afk copy jigs for lathes have existed forever, you can buy them or get plans for them
21:38 katsmeow-afk in simpleest form, they are merely a bar riding on anotehr bar on the back of the lathe
21:38 katsmeow-afk in more accurate form they are often a pantograph form
21:39 Tom_itx i would have to spin the original part?
21:39 katsmeow-afk no
21:39 katsmeow-afk not necessarily, but it's better that you can, you haveto spin the path you aremaking tho
21:39 katsmeow-afk the part
21:40 Tom_itx right
21:40 katsmeow-afk can you bore that out and insert a threaded metal ?
21:41 Tom_itx i'm not sure i wanna risk it
21:41 Tom_itx i thought about that
21:42 katsmeow-afk if you are lucky, that's all allthread, put pliers on it see ifit will unscrew, if so, reinstall it with wood glue or epoxy on the damaged threads
21:42 Tom_itx it won
21:42 Tom_itx won't come out
21:42 katsmeow-afk o
21:42 Tom_itx i'll work something out
21:42 katsmeow-afk so you haveto cut it off flush and then bore it out? watch for metal pins when boring
21:43 Tom_itx i don't think there will be any
21:43 Tom_itx i'm trying to decide what bit to use to cut the hole too
21:44 Tom_itx flat wood bit or something else
21:44 Tom_itx i may have to do that with a hand drill
21:44 katsmeow-afk i's make a mount on the mill's xy table, i'd mount a stepper on it, i'd chuck a section of dowel on that stepper, with an end support, and i'd drive it off the x driver at 1/3 the steps of the driver, as you cut the threads with the mill
21:44 katsmeow-afk bore with a forstner bit, so you don't risk splitting whatever the dowel is in
21:45 Tom_itx pic?
21:45 katsmeow-afk or any other bit with side spurs like a forstner
21:45 katsmeow-afk pic of which?
21:45 Tom_itx oh i think i know
21:45 Tom_itx i gotta go for a while
21:45 katsmeow-afk k
21:45 katsmeow-afk take pics as you do it
22:17 Tom_itx i wonder if i can disengage the tool post so it moves freely then i could make a follower for it
22:18 Tom_itx the idea i had just now was to stack the new dowel in front of the old threaded one and pin it with a small pin to keep the center then use the follower to copy the thread pitch
22:19 Tom_itx i don't think there's a gear combination to do it with the gears
22:20 Tom_itx i may make some calls and have one made if i can't figure something out
22:21 katsmeow-afk followr / copyjig, i said that already