00:42:54 rayh_away is now known as rayh 00:43:17 hi there Ray 00:43:31 Hey. how you doing this evening? 00:43:49 OK. 00:43:59 trying to remember how to use CADMax 00:44:01 took me three hours to blow snow out the main drive way. 00:44:11 I'm a bit sore. 00:44:22 heh - it was around 45 here today, no snow left to blow 00:44:25 what is cadmax? 00:44:37 inexpensive Windows-based parametric CAD package 00:44:43 http://www.cadmax.com/ 00:44:44 Wait a couple days. 00:44:53 heh - OK. just in time for the weekend ;) 00:44:56 okay. never heard of it. 00:45:25 My all time favorite MS CAD package was easycad. 00:45:34 it's got features that are pretty close to SolidWorks (less the sheet metal stuff), not quite as polished, but only $300 00:45:45 Nice 00:45:49 I like it 00:45:59 I have to have a parametric modeller - I make too many mistakes 00:46:09 okay. 00:46:56 do you know a source for both pulleys and belts in GT2 profile? 00:47:06 I seem to find one or the other a lot 00:48:13 Is that the double sided stuff? 00:48:34 nope - just has very good power transfer efficiency, and doesn't slip or cog at all 00:49:00 the gear tooth profile is basically round, like an HTD pulley 00:49:00 I don't know anything about it then. 00:49:46 but the belt is kind of a cross between XL and HTD - the bottom is cut off, leaving room for crap in the pulley without it affecting the belt (like popping it off the pulley) 00:49:47 ok 00:49:59 McMaster shows round toothed 00:50:05 yep -HTD, I think 00:50:18 8mm pitch 00:50:45 hmm - they do have PowerGrip GT style - I wonder if that's the same 00:54:26 it's pretty amazing that I can spend as much on plleys as others spend on their mills :) 00:55:35 yep 00:56:03 And I'm wanting a pair of worm and worm wheels for a scara robot. 00:56:13 cool 00:56:40 that's the problem with buying used high end stuff - maintenance kills you 00:56:56 Yep. 00:57:02 the right angle gear reducer for my bandsaw is a $900 part 00:57:07 But then it is high end 00:57:14 I live with the oil leaking out 00:57:18 yes 00:57:30 I can cut large blocks of stell with ease, so there is a plus 00:57:34 steel 00:57:39 What I was looking at was 100/1 ratio and about 200 a pair. 00:57:58 And that makes a big difference. 00:58:09 ok. this gearbox is only 10:1 ratio, but 1HP input power 00:58:28 3/4 inch shaft on the input, 1-1/8 on the output 00:58:48 Okay. If you need a custom geer quote try rush gears. 00:59:21 the amazing thing is, when I opened it up to clear out the oil of the ages, the gears looked perfectly new and shiny, and this saw is probably from the 1940s 00:59:50 Okay. Why you spec a new one? 00:59:53 I'll check them out 01:00:07 well - it does leak 01:00:28 there's a hole that may be intentional, and oil comes a-bubbling out when I run the saw 01:00:28 Shaft seals? 01:00:35 no - those are fine 01:00:50 Then there is just to much of the wrong kind of oil in there. 01:01:12 I think there may be a small rubber plug missing or something. this may be for bleeding out air when you add oil 01:01:12 Worms are pretty finicky 01:01:32 yep - it's heavy duty gear oil in there 01:01:41 about like cold molasses 01:01:49 talk to roltek the next time you catch him on 01:02:01 ok - he's a gear guy? 01:02:20 Made all the transmissions for K&T. 01:02:30 oh - I guess he is a gear guy ;) 01:02:31 builds nascar transmissions now. 01:03:04 cool 01:05:18 do you know how rush gear's pricing is? 01:12:34 High but for custom gears they are the best. 01:13:18 If you can find a stock item one a shelf someplace that will usually cost less. 01:15:40 ok - tahnks. not that I actually measured anything when I had that box apart, but it's good to know 01:15:53 (also, as I said, the gears were amazingly well preserved) 01:16:15 May not be a gear problem at all. 01:16:31 Is there a lot of lash? 01:16:45 nope - the saw works - I was just concerned about the oil hole. I don't want to order a replacement from Dake to see 01:16:56 not that backlash matters for a bandsaw anyway 01:18:00 It would be an indication of wear in the worm. 01:18:05 true 01:18:13 Or alignment problems. 01:18:24 hmmm - let me go check 01:18:35 sometimes these have eccentric shafts or bearings or bearing holders. 01:20:35 I can't detect any backlash in the reducer, but it would be hard to detect by hand at 10:1 01:22:04 the saw actually has 3 sets of gear reduction. the V-belt sheaves from motor to gear reducer, right-angle reducer (10:1), and then the output of that has a small gear that drives the huge saw pulley 01:23:22 Got to get the surface feet per minute down. 01:23:43 yep 01:24:08 the blade pulleys are about 24" across, so it needs a lot of reduction 01:24:23 maybe a little less, like 20-22" 01:26:07 Okay. That large size should make blades last longer. 01:26:19 I hope so. 01:26:29 plus I don't use it too often, so they should last a looooong time :) 01:26:51 Right unless you drag all the teeth off of em. 01:27:41 I bought a Johnson model K (or A?) on eBay, only it turned out to bea much larger model J 01:28:02 it cuts through anodized aluminum like butter 01:29:41 hmm - maybe it was supposed to be a model B - the 300 pound one 01:30:37 I've serviced quite a few of the k model. Nice units. 01:31:04 those are the 300 pound ones? 01:36:15 Seems like about that 01:36:18 or more 01:37:11 ok - that's the one I thought I was buying, but It was the bigger one instead (heck of a deal, I think - $300 for an 11x18 or 11x14 throat) 01:37:30 They had hydraulic lift and repeat so you could cut whole bars unattended. 01:37:43 I'm thinking of adding that to mine 01:38:14 I have a small VFD fro speed adjustents, and I'm thinking that just a stop bar is good enough for cutting quantities of same-length parts 01:38:34 Right. That's how these did it. 01:38:50 lift ram, unclamp, push until you hit the stop, clamp, start motor, drive down at feed rate (or let the hydraulic cylinder do it) 01:38:51 The stop was spring loaded so it tripped a limit. 01:39:01 yep - that would work 01:39:15 or a current trip 01:39:20 Yes it was the same hyd cylinder for both directions. 01:39:33 my lift cylinder is having trouble 01:39:36 there was a solenoid that routed the oil 01:39:50 I've replaced the O-rings, but it still won't hold the ram up 01:40:04 those are another very expensive part from Dake 01:40:42 Is there a solenoid in the lift circuit? 01:40:52 there is no lift circuit :) 01:41:05 it's a manually operated saw 01:41:12 but I might CNC it some day 01:41:14 So you hand raise the head 01:41:35 then set the down speed using a valve? 01:41:37 yep - you're supposed to raise the head by hand, then turn the cylinder control all the way one direction 01:41:43 yep - the same valve 01:42:01 auto shut-off though (in a NEMA 12 box now) 01:42:05 bypass when you lift and regulate on the way down. 01:42:37 it's got a return line, so I think lifting is possible even with it "locked" (I could be wrong about that) 01:42:54 of course, mine is never locked right now, so I can always lift it 01:43:03 I should look at that valve again 01:43:13 Getting the hydraulic to work is the most difficult part. 01:43:22 for manual or CNC? 01:43:32 You may find that the leaking rather than holding is a valve problem 01:44:12 I'm not sure the cylinder is leaking - I'll have to look at it again 01:44:36 I did rebuild it a while ago, but that was the first time I'd ever seen a hydraulic cylinder taken apart 01:44:42 But it won't hold the head up for very long? 01:44:43 so I might have goofed 01:44:52 very long being about 1 microsecond ;) 01:45:00 oh. 01:45:10 hmmm - let me fiddle with it for a minute - I could be wrong about this 01:45:48 It could also be the bypass valve not seating properly to hold. 01:51:00 ok - the valve handle turns easily, no drips or visible leaks when I exercise the head 01:51:24 nothing moves in the return line though, and cahnging the valve setting has no apparent effect on the fall speed 01:51:53 so it looks like i need to take the cylinder apart again (or check that the 3 threaded rods are tightened correctly) 01:52:03 the filler cup on top still has oil in it as well 01:58:26 Is that valve a multiturn one with a bent handle sticking up? 01:58:51 no - it has the bent handle sticking up, but it's only like a half turn (1 turn at the most) of usable range 02:00:33 It's been a while now but I thought that was a multiturn device. 02:00:53 what I get for tinking eh! 02:00:59 heh 02:01:03 this one could be different 02:01:11 the saw has a serial number below 10000 02:01:12 True 02:01:24 like 9342 or something 02:01:36 The ones I worked on were < 500 02:01:42 wow - cool 02:01:48 on the model K or the model J? 02:01:52 very old 02:02:10 (K might have come after J, but I'm not sure) 02:02:27 In some ways they worked better than the Hydmech that replaced them 02:02:57 Put 3 plc's in that and replaced several other parts. 02:04:01 I'd just go for the G-Rex - that's probably a perfect use for it in standalone mode 02:04:09 hmmm - glad I thought of that 02:05:51 That's it. Or you can get a $99 brick from automation direct. 02:06:04 ship it to me and I'll program it for you. 02:06:09 well - Mariss sent me a G-rex, so Imight as well use it :) 02:06:21 You bet. 02:06:38 though I spent the money on the Rabbit development kit instead ;) 02:13:42 That sounds like a screw up someplace. 02:15:07 gotta run. Nice talking with you. 02:15:12 rayh has quit 07:33:00 SWPadnos has quit 07:33:00 jtr_ has quit 07:33:25 SWPadnos has joined #emc-devel 07:33:25 jtr_ has joined #emc-devel 07:34:37 [Global Notice] Hi all. We just experienced a brief connectivity loss on a main rotation server. Looking at the problem now. Apologies for the inconvenience! 07:35:32 SWPadnos is now known as SWP_Away 13:30:40 rayh has joined #emc-devel 19:38:40 LawrenceG has quit 19:42:19 LawrenceG has joined #emc-devel 21:37:41 rayh has quit 22:15:49 logger_devel has joined #emc-devel 22:15:49 topic is: "Welcome to the Enhanced Machine Control development place. | Regular Developers' meetings 24/7 !" 22:15:49 Users on #emc-devel: logger_devel LawrenceG jtr_ SWP_Away anonimasu jepler @ChanServ cradek steves_logging alex_joni