#garfield Logs

May 07 2018

12:37 AM zhanx: rue_mohr: ok just need to hob the bolt and put the tension screws in https://imgur.com/a/UYneG3b
12:41 AM rue_bed: I suggest a long bolt, hub the smooth bit
12:41 AM rue_bed: and make sure the hobb isn't eccentric
12:42 AM rue_bed: katsmeow, your going to tell me if we get to play with your avrs more, right?
12:43 AM zhanx: oh now rue_bed wants me to buy stuff ? :P
12:43 AM rue_bed: well, you can see how threaded works out...
12:43 AM rue_bed: I meant to make a bolt hobber
12:43 AM zhanx: noted
12:45 AM rue_bed: more fighting with the bowden machine I made, dont go bowden
12:46 AM zhanx: i won't go bowden till i can make and design my own better
12:47 AM rue_bed: lots of snag points, too much spring/stretch, the pipe connectors can come loose, starting a new roll is a pita that usually requires splicing filament....
12:47 AM rue_bed: you cant print fast anyhow, nothing binds and the plastic dosn't get heated properly
12:48 AM zhanx: i won't be printing fast anyways
12:48 AM zhanx: i want quality
12:48 AM rue_bed: I can give ya a few design improvers to print
12:49 AM rue_bed: upgrade it to 5mm z rod (or, if I have it, belt z drive) , geared axies, 5 point linear bearings
12:50 AM zhanx: my z rod is 8 mm
12:50 AM rue_bed: yup
12:50 AM rue_bed: 5mm is an upgrade, because the 8mm 'pulls' the carriage around if its even slightly eccentric (and that all thread is alwsays horrid)
12:50 AM rue_bed: the 5mm isn't strong enough to force things out
12:51 AM rue_bed: but the design dosn't fit 5mm, so you have to start with 8
12:52 AM rue_bed: I have a special print, that you stop and drop M5 nuts into, it does an encapsulated print to give the M5 nuts the outter size of the M8 nuts
12:52 AM rue_bed: so they swap in
12:52 AM zhanx: k
12:53 AM rue_bed: need a new coupler solution today, I was searching for anyhting that fits the bill, and it looks like people have been making 2 part coullers that use a silicone middle layer
12:53 AM rue_bed: so, I'm looking at them, but they all have aspects I dont like
12:53 AM rue_bed: might design one
12:53 AM rue_bed: pondering
12:54 AM zhanx: ponder faster
12:55 AM rue_bed: your not ready yet, you need to be able to print first
12:56 AM rue_bed: remember that you will want a fan over the nozzel heatsink, a 40mm iirc is a good fit
12:58 AM zhanx: got one
12:58 AM rue_bed: some of the processors in those commercial printers have good ones
12:58 AM rue_bed: k
01:00 AM zhanx: those printers are a good source of parts
01:00 AM zhanx: i need to mic out the rods i got, but i might have the 8-5mm upgrade rods already
01:01 AM rue_bed: M5 threaded?
01:01 AM rue_bed: (can also be imperial equiv... #10?)
01:02 AM zhanx: oh i thought you meant smooth
01:07 AM rue_bed: I went to 10mm on machine 2, but i'm not sure it was much of a difference
04:56 PM zhanx: rue fyi my first attempt at hobbing a bolt was bad, threaded rod sucks, till try a bolt tomorrow
08:33 PM rue_mohr: ok
08:34 PM rue_mohr: it doesn't have to be a good fit nested hobb for the plastic, its its even just moderate knurling its ok
08:35 PM rue_mohr: if the plastic jambs, even super aggressive teeth wont help
08:35 PM Tom_L: 8mm bolt?
08:35 PM rue_mohr: yes
08:35 PM Tom_L: 3mm tap?
08:35 PM Tom_L: or was it 2mm
08:35 PM rue_mohr: no, you can use like a 1/4" tap
08:36 PM rue_mohr: it dosn't have to perfectly fit the filament
08:36 PM Tom_L: iirc i did 2-3mm for more surface on the string
08:37 PM Tom_L: but mine was more a theoredical part than actual
08:38 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/reprap/drive6.jpg
08:38 PM rue_mohr: hmm, what do I want from china....
08:38 PM Tom_L: you remember those...
08:38 PM rue_mohr: oh yea
08:38 PM rue_mohr: those are for direct drive
08:38 PM rue_mohr: those came out nice too
08:38 PM rue_mohr: what did you use?
08:38 PM Tom_L: those were more just to see if i could
08:38 PM Tom_L: ?
08:39 PM Tom_L: 2 or 3mm tap
08:39 PM rue_mohr: yea, I cant remember, did you use the lathe
08:39 PM rue_mohr: hmm
08:39 PM Tom_L: tap in the lathe spindle
08:39 PM Tom_L: part held somehow...
08:39 PM rue_mohr: I made a jig for the lathe, they dont always work out
08:39 PM Tom_L: i forget now
08:39 PM rue_mohr: yea, I made a jig
08:39 PM Tom_L: tap was in the tool post
08:39 PM rue_mohr: ?
08:40 PM rue_mohr: its good for worm drives too
08:40 PM Tom_L: i think i put the tap in the tool post
08:41 PM Tom_L: and ran it in from the side
08:41 PM Tom_L: i don't really remember now
08:41 PM Tom_L: err no, the tap was in the spindle and the part was in a holder in the tool post so i could move it in and out
08:42 PM Tom_L: the part freewheeled
08:53 PM zhanx: rue_mohr: well thats good
08:53 PM zhanx: too bad i missed my mark
08:54 PM zhanx: but i will test it tomorrow after work
10:30 PM katsmeow: "get away from there!" ; "why??" ; "it's dangerous!" ; "Why do i need to get a dangerous whey frum?"
10:59 PM katsmeow: .... ; "it's dangerous!" ; "Ok I'll ask them!" ; "ASK THEM!?!" ; "Yes, for the dangerous whey frum!"
11:26 PM rue_mohr: hmm
11:26 PM rue_mohr: well, I made one of about 8 screens to filter the deer out of my potatoes
11:27 PM katsmeow: can't the bear dothat for free?
11:28 PM katsmeow: sic the lawn mower on them
11:30 PM zhanx: deer and potatoes?
11:30 PM zhanx: its the groundhogs
11:31 PM rue_mohr: buddy was saying sentry gun
11:31 PM rue_mohr: For now, screens
11:31 PM zhanx: i got a .22
11:31 PM zhanx: it works
11:31 PM katsmeow: nice new leather coat, eh?
11:31 PM rue_mohr: not while I'm at work
11:32 PM zhanx: mine come at night
11:33 PM zhanx: i can see rue in a deer skin coat
11:34 PM rue_mohr: hmm, print new bearing? (Y/n) >
11:35 PM rue_mohr: yea, that'll gve me something for tommorow
11:35 PM rue_mohr: not sure how to cut het pipe that I bent
11:35 PM rue_mohr: gonna try it in the bandsaw, I dont know how critical the squareness of the cut is
11:36 PM rue_mohr: and I have to work out the arc lengths
11:36 PM rue_mohr: 1/3
11:43 PM zhanx: rue_mohr: better make a jig to cut them
11:46 PM rue_shop3: not sure
11:46 PM rue_shop3: the tightest ring is 7'
11:46 PM rue_shop3: over the length of the bandsaw jaw, its not much arc
11:47 PM zhanx: if you jig the cuts you can jig the weld
11:50 PM katsmeow: lay the ring out, overlappingthe pipe ends, measure 1/3's accurately, cut thru both pipes at the overlap at same time
11:51 PM katsmeow: you will have a sawblage kerf
11:51 PM katsmeow: blaDe
11:54 PM katsmeow: or doit some other way, sorry