#garfield | Logs for 2016-10-26

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[16:44:41] <katsmeow> "remember that program that takes 2 years to run? we ran it on the new Blue Demon today"
[16:44:41] <katsmeow> "what do you mean by 'today'? how long did it take to run?"
[16:44:41] <katsmeow> "well, we don't know, Sam clicked on 'start', there was a loud bang from the generator, and it was done"
[16:44:41] <katsmeow> "AND I AM IN CONTROL OF YOUR SITUATION NOW"
[16:44:46] <katsmeow> that is all
[21:08:16] * katsmeow would like to buy : 8 pcs : .75 shaft, 3" long, with 2" of each shaft turned down to 5/16 ,
[21:09:06] <katsmeow> then, leaving the 5/16 for 1/4 inch at the .75 end, turn the remaining 5/16 to 1/4
[21:09:48] <katsmeow> at the far end of the 1/4, turn down 3/16 length to 1/8 diameter
[21:10:17] <katsmeow> a bearing will sit on the 5/16 landing and a bearing will sit on the 1/8 landing
[21:10:40] <katsmeow> i will cut the remaining .75 to a shape i need
[21:13:27] <katsmeow> machinist advertising his time for sale on ebay : "sand me a massage and I'll get back to you with my contact info."
[21:13:44] <katsmeow> "sand me a massage"
[21:14:31] <katsmeow> knead his body with a sander ?
[21:34:31] <rue_shop3> jester? no
[21:34:32] <rue_shop3> hmm
[21:34:35] <rue_shop3> hi kat
[21:34:40] <rue_shop3> high tom
[21:35:23] <katsmeow> hi rue
[21:42:06] <Tom_L> http://tom-itx.no-ip.biz:81/~webpage/cnc/temp/Shaft.jpg
[21:42:23] <Tom_L> rue_house, make 8 of those and send them to Ga
[21:42:49] <katsmeow> what's in Ga ?
[21:43:07] <Tom_L> a kat
[21:43:30] <katsmeow> the kat in Al needs them
[21:43:31] <Tom_L> err Al
[21:43:33] <Tom_L> sry
[21:44:12] <katsmeow> fwiw, the stock can be square, and can be as small as .700 dia or square
[21:44:53] <katsmeow> thinking as i am drawing too, but your draw is better than mine ........
[21:46:31] <katsmeow> if the entire turned-down portion is 1.5" long, that might work better
[21:53:11] <Tom_L> what part is less then?
[21:54:14] <katsmeow> taking pic of sketch..........
[21:55:20] <Tom_L> http://tom-itx.no-ip.biz:81/~webpage/cnc/temp/shaft2.jpg
[21:55:29] <rue_shop3> metal, plastic, or wood?
[21:55:52] <katsmeow> steel preferred
[21:56:06] <Tom_L> numbers right?
[21:56:10] <rue_shop3> its 3cm long?
[21:56:17] <Tom_L> 3"
[21:56:30] <rue_shop3> which kings inches?
[21:56:34] <Tom_L> mine
[21:57:00] <rue_shop3> you need 3 or 1.5?
[21:57:18] <rue_shop3> can you dim it in mm?
[21:57:40] <katsmeow> don't start cutting yet.........
[21:57:41] <rue_shop3> is it the firing pin for a bomb?
[21:58:38] <rue_shop3> 8pcs
[21:58:39] <Tom_L> you must sign a NDA before i can disclose that
[21:59:04] <Tom_L> are those dimensions right?
[21:59:12] <rue_shop3> 8 pcs : .75 shaft, 3" long, with 2" of each shaft turned down to 5/16 ,
[21:59:12] <rue_shop3> <katsmeow> then, leaving the 5/16 for 1/4 inch at the .75 end, turn the remaining 5/16 to 1/4
[21:59:12] <rue_shop3> <katsmeow> at the far end of the 1/4, turn down 3/16 length to 1/8 diameter
[21:59:12] <rue_shop3> <katsmeow> a bearing will sit on the 5/16 landing and a bearing will sit on the 1/8 landing
[21:59:12] <rue_shop3> <katsmeow> i will cut the remaining .75 to a shape i need
[21:59:33] <katsmeow> uploadering........
[22:00:24] <katsmeow> http://DesignerThinking.com/images/shoulder/DSCF7178m.jpg
[22:00:56] <Tom_L> design change...
[22:01:07] <Tom_L> need an ECO first
[22:01:13] <katsmeow> forgot to put a tiny shoulder on the 1/8 x 1/8 , but that transition to 3/8 wil prolly be radiused anyhow and hold the bearing ID down a few thou, so all is good
[22:01:23] <katsmeow> only in length, Tom
[22:01:26] <rue_shop3> "Description of contents: digit masks and firing pin for Bomb" :)
[22:01:34] <rue_shop3> how long is that 3.8 od shoulder?
[22:01:51] <rue_shop3> its decrementing steps, right?
[22:02:15] <katsmeow> yeas, just enough so the OD of th ebearing isn't scrubbing the .75 portion
[22:02:19] <rue_shop3> 0.75 - 3/8 - 5/16 - 3/8 1/8
[22:02:27] <katsmeow> yeas
[22:02:37] <katsmeow> the 0.75 can be 2mm
[22:02:56] <katsmeow> err
[22:02:57] <katsmeow> 2cm
[22:03:23] <rue_shop3> the lengths,respectivly are 1 - ? - 3/16 - ? - 1/8
[22:03:25] <katsmeow> i will put bearings on the 5/16 and the 1/8
[22:03:58] <katsmeow> umm
[22:04:02] <katsmeow> still thinking
[22:04:22] <rue_shop3> where ?+? - 3/16 - 1/8 = 1.5"
[22:04:26] <katsmeow> shorten the 1.5 OL to 1.2 ?
[22:05:31] <rue_shop3> I'm sure the 3/8 section length is important
[22:05:46] <rue_shop3> oh, maybe not
[22:05:58] <katsmeow> i can adjust where in the housing the 1/8 ID bearing will be, so that length isn't especially critical, but the bearing landings naturally are
[22:06:26] <rue_shop3> something is wrong, it goes from 3/8 to 5/16 to 3/8
[22:06:40] <katsmeow> no, the 3/8 is 3/8 only because it''s max OD the 5/16 ID bearing will slide up to get to the 5/16 landing
[22:06:47] <Tom_L> how wide is the 3/8 bump?
[22:07:10] <rue_shop3> the 3/8 against the 0.75 is maybe 1/8" long?
[22:07:18] <katsmeow> Tom, .030 is great
[22:07:32] <katsmeow> just enough so the OD of th ebearing isn't scrubbing the .75 portion
[22:07:46] <rue_shop3> 0.75 - 3/8 - 5/16 - 3/8 - 1/8
[22:07:56] <rue_shop3> your bump is the wrong way..
[22:08:06] <katsmeow> the wrong way?
[22:08:11] <Tom_L> http://tom-itx.no-ip.biz:81/~webpage/cnc/temp/shaft2.jpg
[22:08:25] <rue_shop3> the drawing and the numbers conflict, I'm trying to resolve
[22:09:04] <katsmeow> Tom, similar bump at the 3/8 - 1/8 transition?
[22:09:04] <rue_shop3> do you know how much less 0.03 is from 0.1 "?
[22:09:19] <rue_shop3> oh quarter
[22:09:38] <rue_shop3> 0.75 - 3/8 - 5/16 - 1/4 - 1/8
[22:09:47] <katsmeow> Tom, change 1.533 length to 1.2
[22:10:17] <Tom_L> http://tom-itx.no-ip.biz:81/~webpage/cnc/temp/Shaft3.jpg
[22:10:18] <katsmeow> i need to put these end to end in a ~3" tube
[22:10:26] * rue_shop3 looks for metal
[22:11:04] <Tom_L> there is no 3/8 to 1/8 transition
[22:11:22] <katsmeow> umm,,, the tiny end
[22:11:41] <Tom_L> how diametered?
[22:12:18] <rue_shop3> is 0.742 close enough to 0.75?
[22:12:27] <rue_shop3> yes
[22:12:40] <rue_shop3> this peice passed grade 5
[22:12:42] <katsmeow> .175 OD
[22:13:07] <katsmeow> rue the .075 is really not critical
[22:13:20] <katsmeow> .700 is minimum
[22:13:45] <katsmeow> after some hacksawing on it, i'll put a 1/2 OD bearing into it
[22:14:32] <Tom_L> http://tom-itx.no-ip.biz:81/~webpage/cnc/temp/Shaft3.jpg
[22:14:47] <Tom_L> http://tom-itx.no-ip.biz:81/~webpage/cnc/temp/shaft2.jpg
[22:15:14] <katsmeow> looks very good
[22:15:41] <Tom_L> http://tom-itx.no-ip.biz:81/~webpage/cnc/temp/Shaft3.jpg
[22:15:44] <katsmeow> oops
[22:15:50] <Tom_L> rue_shop3, make 8 of those
[22:15:52] <katsmeow> the 1.502 still exists
[22:16:01] <katsmeow> needs to be shrunk
[22:16:03] <Tom_L> it's a reference dimension
[22:16:09] <Tom_L> overall length is 3"
[22:16:32] <katsmeow> overall length is wrong
[22:16:37] <Tom_L> what should it be?
[22:16:57] <katsmeow> [21:37] <katsmeow> shorten the 1.5 OL to 1.2 ?
[22:17:16] <katsmeow> WAIT
[22:17:40] <katsmeow> not the OL OL , the turned shaft portion be 1.2 ... ish
[22:18:49] <Tom_L> http://tom-itx.no-ip.biz:81/~webpage/cnc/temp/shaft2.jpg
[22:19:22] <Tom_L> or all the turned part to be 1.2?
[22:19:40] <katsmeow> all the turned portion
[22:20:43] <katsmeow> [21:43] <katsmeow> i need to put these end to end in a ~3" tube <<== prolly went unseen
[22:20:48] <Tom_L> http://tom-itx.no-ip.biz:81/~webpage/cnc/temp/shaft2.jpg
[22:21:22] <katsmeow> sheesh you are fast
[22:21:22] <Tom_L> overall is still 3" ?
[22:21:26] <katsmeow> yeas sir
[22:21:35] <katsmeow> err
[22:21:51] <katsmeow> proly shuld be, so yoou can get a grip on it in the lathe
[22:22:19] <Tom_L> that makes the .750 alot longer
[22:22:48] <katsmeow> yeas, got to hacksaw on it anyhow, and that will give me more room to verify what i need to cut
[22:23:07] <katsmeow> unless there is a material shortage, the longer unturned portion is ok
[22:23:12] <Tom_L> http://tom-itx.no-ip.biz:81/~webpage/cnc/temp/shaft2.jpg
[22:24:20] * katsmeow agrees that is a lot longer
[22:24:43] <Tom_L> http://tom-itx.no-ip.biz:81/~webpage/cnc/temp/shaft2.jpg
[22:24:49] <Tom_L> added 2 reference dimensions
[22:24:53] <katsmeow> it need not be that long, i will be cutting it shorter, but i would rather get it long than too short
[22:25:52] * Tom_L waits for the ECO before stamping it and sending it onto his Canadian MFG
[22:26:11] * katsmeow confirms the design papers
[22:27:05] <katsmeow> i can fit the turned portion into the tube, can fit bearings onto it, and have room to trial and adjust on the unturned portion :-)
[22:27:24] <Tom_L> http://tom-itx.no-ip.biz:81/~webpage/cnc/temp/Shaft3.jpg
[22:27:30] <Tom_L> final visual inspection
[22:27:33] <katsmeow> cost estimate?
[22:27:59] <katsmeow> very good, Tom
[22:28:03] * Tom_L looks at RUE MCGOO
[22:29:02] <katsmeow> if you cnc that so the lathe cranks them out while you sip coffee, do not delete the cnc file
[22:29:27] <Tom_L> no cnc, that's catia
[22:29:47] <Tom_L> i drew that for rue
[22:29:53] <katsmeow> i understand
[22:30:15] <katsmeow> but IF cnc code is made up to make 8 of them, then ...........
[22:30:48] <katsmeow> or IF the lathe can copy, then keep a copy
[22:30:51] <Tom_L> 25" x .750 bar
[22:31:03] <Tom_L> maybe 25.5"
[22:31:09] <Tom_L> depending how wide your saw is
[22:31:21] <katsmeow> etc,, my drift is i hope this can be something worthwhile, i have a thing in mind which i have never seen before
[22:32:17] <katsmeow> or as small as 0.700 / 18mm
[22:36:09] <katsmeow> it may not (or maybe it will) lift a car battery in all possible scenarios, but then not every robot needs to lift a car battery in all manners of lifting
[22:36:36] <katsmeow> range of movement , fluidity of motion, may be more important
[22:39:13] <Tom_L> the .188 on the end is supposed to be .125
[22:39:56] * Tom_L wonders about kat's drawnig
[22:40:08] <Tom_L> 3/8 in the middle
[22:40:29] <Tom_L> how can you press a 5/16 something over a 3/8 middle?
[22:40:32] <katsmeow> i did OD, you did radii, i did not verify your math
[22:40:42] <Tom_L> no, look at it
[22:40:43] <katsmeow> OOOPS
[22:40:49] <katsmeow> 1/16 SMALLER
[22:40:55] <katsmeow> = 1/4
[22:41:05] * katsmeow offers appologies to rue
[22:41:11] <katsmeow> he caught it
[22:41:16] <Tom_L> so my .125 is ok?
[22:41:34] <katsmeow> on http://tom-itx.no-ip.biz:81/~webpage/cnc/temp/shaft2.jpg ? yeas
[22:41:47] <Tom_L> i was just comparing notes
[22:42:02] <katsmeow> you do not show a radius below H
[22:42:26] <Tom_L> huh?
[22:42:28] <katsmeow> but that would be .156
[22:42:36] <katsmeow> the 5/16 bearing seat
[22:42:55] <Tom_L> it got moved over to the left a bit
[22:42:57] <Tom_L> it's there
[22:43:23] <katsmeow> oh, yeas, sorry, i was zoomed in
[22:43:38] <Tom_L> it didn't move when the part grew
[22:43:43] <katsmeow> ah
[22:43:48] <katsmeow> or shrank
[22:44:00] * katsmeow looks excited
[22:44:26] <Tom_L> () are reference dimensions
[22:44:52] <katsmeow> but they are real numbers?
[22:45:03] <Tom_L> catia doesn't lie
[22:45:39] <katsmeow> they are derived by math, not by specification, is what i mean
[22:45:47] <Tom_L> uh huh
[22:46:05] <katsmeow> wonderful :-)
[22:47:48] <katsmeow> i been runing this over in my head for 2 weeks, wondering how i could make this this with that .70-.75 portion firmly attached to the 5/16 shaft, and could only come up with it being one piece, which i could not make
[22:49:22] <rue_shop3> ok, so whats up?
[22:49:45] * katsmeow points toTom's urls
[22:51:13] <katsmeow> cost to make 8 of them, and eta?
[22:51:16] <rue_shop3> strange steel
[22:51:23] <katsmeow> strange?
[22:51:30] <rue_shop3> ok I got the 0.75 dia
[22:51:35] <rue_shop3> whats after that?
[22:51:57] * katsmeow looks worried now
[22:52:08] <rue_shop3> whats 0.188 radius in fractional diameter?
[22:52:09] <katsmeow> http://tom-itx.no-ip.biz:81/~webpage/cnc/temp/shaft2.jpg
[22:52:18] <katsmeow> 1/8 dia
[22:52:28] <rue_shop3> hu?
[22:52:41] <katsmeow> the other bearing seat is 5/16
[22:52:45] <rue_shop3> 0.375
[22:53:01] <rue_shop3> 3/8
[22:53:21] <rue_shop3> 9.525 mm
[22:53:29] <katsmeow> umm, the .188 is not a radius
[22:53:45] <rue_shop3> its the radius of the step after .75"
[22:53:47] <katsmeow> the .063 and the .088 are radiuses
[22:53:56] <rue_shop3> http://tom-itx.no-ip.biz:81/~webpage/cnc/temp/shaft2.jpg
[22:54:44] <katsmeow> i dunno, i added .0something to the 1/8 diameter, the .088 shoulder is to keep the outer race off the 1/4 dia portion
[22:55:02] <rue_shop3> 1.2!? this thing got longer!
[22:55:18] <katsmeow> 1.2 is shorter than 1.5
[22:55:30] <rue_shop3> its 1.8+1.2 long now
[22:55:39] <katsmeow> yep, same 3" OL
[22:55:44] <rue_shop3> http://designerthinking.com/images/shoulder/DSCF7178m.jpg
[22:55:51] <rue_shop3> ah, thts not a 1 on the left...
[22:56:02] <katsmeow> fluid design, after consult with professionals
[22:56:23] <rue_shop3> hmm, that will screw up all the centering
[22:56:40] <katsmeow> [21:55] <katsmeow> yeas, got to hacksaw on it anyhow, and that will give me more room to verify what i need to cut
[22:56:40] <katsmeow> [21:55] <katsmeow> unless there is a material shortage, the longer unturned portion is ok
[22:57:12] <katsmeow> what would you prefer the unturned portion to be, rue?
[22:57:27] <katsmeow> 1.2 ?
[22:57:34] <katsmeow> so it's 2.4 OL ?
[22:58:34] <rue_shop3> I'll screw with it when the tips done
[22:59:04] <katsmeow> you need to adjust it to what material you have? to what the lathe neds to get a grip n?
[22:59:14] <rue_shop3> step 2) turn 1.2" down to .375"
[22:59:55] <rue_shop3> er nope
[22:59:56] <katsmeow> i am going to put a .500 OD beaing in it sideways, need .1 of materal around to hold it, i am not 100% sure wher that bearing will be yet
[23:00:00] <rue_shop3> support failure
[23:00:08] <rue_shop3> have to make it from the tip back
[23:00:13] <rue_shop3> so,
[23:00:47] <rue_shop3> step 2) turn, from end, .188" down to 0.125"
[23:00:49] <katsmeow> yeas, it's going to be delicate, like i said, no lifting car batteries
[23:01:18] <rue_shop3> delta .3125"
[23:01:36] <katsmeow> if the angles and motion and clearances, etc work, then it can be scaled up in all the right places
[23:02:01] <katsmeow> there's at least 3 ways to pull this scheme off, all need the these same 8 pieces
[23:13:18] <katsmeow> is it possible to make, rue?
[23:14:27] <rue_shop3> I think my bit is dull.. thou aren't comming off right
[23:15:19] <katsmeow> the bearing seats are *important*, these races are *very* thin and will be easy to distort
[23:18:50] <rue_shop3> ok, the tip is a bit long, lets see how this progresses
[23:18:55] <rue_shop3> .03"
[23:19:20] <rue_shop3> 0.175 dia for .03"
[23:20:20] <katsmeow> the dia is only yo keep the outer race (.25 OD) off the larger portion of the shaft , if you can do that another way, i am good with it
[23:22:08] <rue_shop3> ok I managed to pull off .03"
[23:22:32] * katsmeow feels some awe
[23:22:33] <rue_shop3> next step is 0.25" for .702"
[23:23:40] <katsmeow> that portion is simply max dia that the 5/16 ID bearing can slip down to it's bearing seat, so not especially critical for dia
[23:28:47] * katsmeow wants to shake Tom's paw, because her paws are shaking
[23:30:33] <katsmeow> the .002 isn't necessary either
[23:31:00] <katsmeow> like i said, i can position the lower bearing with some range
[23:31:23] <katsmeow> can't go to close to the otehrs tho, hence the much smaller OD on the inner bearing
[23:38:29] <rue_shop3> ok next step ...
[23:38:30] <rue_shop3> tom
[23:38:31] <rue_shop3> Tom_L,
[23:38:41] <rue_shop3> the 0.25" section, there is no radius!
[23:38:46] <rue_shop3> yes there is
[23:38:47] <rue_shop3> sorry
[23:39:03] <rue_shop3> .312" for a length of 0.25"
[23:46:47] <rue_shop3> then .375" dia for .03"
[23:47:29] <katsmeow> what?
[23:47:53] <katsmeow> oh, the shef, yeas
[23:47:58] <katsmeow> sheLf
[23:48:14] <katsmeow> offset, bushing, stand-off, etc
[23:49:03] <katsmeow> again, only to offest so the OF race does not rub the larger portion next to it, not terribly critical
[23:49:11] <katsmeow> OF race
[23:49:15] <katsmeow> ODDDDDDDDDDDDDD
[23:49:27] <katsmeow> sore finger tings
[23:51:19] <rue_shop3> ok and the whole thing 3" long
[23:52:06] <katsmeow> ok
[23:52:23] <katsmeow> or 2.75, not critical
[23:55:58] <rue_shop3> can the base end of the .75 be a bit eccentric?
[23:56:08] <rue_shop3> by maybe 2 thou?
[23:57:29] <katsmeow> yeas, the .75 isn't bearing seats till i hacksaw it square and bore the bearing seat (i have a reamer to make seat round)
[23:58:15] <rue_shop3> want a rough hole then?
[23:58:16] <katsmeow> i can file to make the flat sides mike off the bearing axis the same
[23:58:28] <katsmeow> i dunno where i want the hole yet
[23:58:42] <rue_shop3> not the middle?
[23:59:07] <katsmeow> i'd prefer it high up on the lowest 1" , but your lathe cannot do that
[23:59:24] <rue_shop3> 4 jaw honey
[23:59:42] <rue_shop3> er, you talking side or end?
[23:59:42] <katsmeow> yo can drill a 1/2 hole between the jaws??
[23:59:47] <katsmeow> side
[23:59:52] <rue_shop3> oh, thats harder
[23:59:55] <katsmeow> 90 to the long axis
[23:59:57] <katsmeow> yeas