Re: Step #1 Encoder #RELS
|
I am so hopelessly outclassed! ;) When i grow up, I wanna be like you, John. Seriously! I guess I better start growing up soon, I mean, I'm 64, and would need someone else to do drawings for me to have a chance of putting something like that together. I've learned some stuff, I guess. I understood every word of what you said, and I've worked on machines that do what your furnace does. 1,200,000 btu burners, too. Trying to design one I'd be utterly clueless. At least I realize that, though. I'm now thinking I goofed up by not building a Gingery lathe. Problem is that the things I want to build are mostly of steel. Aluminum doesn't work well for gun barrels, actions and such. Except AR's, which aren't my favorite rifle or pistol. I'm an old iron fan. 1911's, 1903 Springfields, 1898 Mausers, 1896 Mausers. that sort of thing. I didn't take the CNC Machining class, for example, I went for Precision Manual Machinist. And my newest big lathe is vintage 1946 or so. I got sent home from work today, before the end of the shift, because the doctor's note I got last week restricts my climbing stairs. If it's really a problem, and a few weeks ago when I made the appointment, I was having trouble sleeping because both hips, left knee, and ankle were about killing me! I may be about to retire, one way or another, and if so, I might just have time to start doing some of those things I was too dumb to do years ago. Though it would be nice have some more bills paid off before that happens, I'm not in the least bummed out today. Bill in OKC William R. Meyers, MSgt, USAF(Ret.) Guard your women and children well, Send These Bastards Back to Hell We'll teach them the ways of war, They Won't Come Here Any More Use your shield and use your head, Fight till Every One is Dead Raise the flag up to the sky, How Many of Them Can We Make Die! Heather Alexander, March of Cambredth On Tuesday, December 17, 2019, 7:47:26 PM CST, John Dammeyer <johnd@...> wrote: I think because I made the Gingery lathe and a lot of other bits and pieces the practice has resulted in repeatable results.? Like a musical instrument, practice, practice, practice.? And I know nothing. ? The X axis motor mounts are an example of dealing with limitations.? In this case not a large enough crucible for the entire mount plate so I made it in two pieces and bolted them together.? The exploded diagram shows what I wanted to do including the angular contact bearings. ? The castings came out without any issues.? The one that holds the bearings is a two part since there's the relief on the bottom side.? ? ? The close-up with the bearing cap and the angular contact bearings shows the surface finish isn't great but isn't too bad either. My green sand is actually quite coarse. ?If I was I using Petrobond or surrounding the pattern with a really fine grit green sand I'd see much better finish. ? ³§³Ù¾±±ô±ô¡ ? The Shumatech DRO made repeatable positioning for the holes a no brainer. ??I use the ELS, turning my rotary chuck, to position the holes in the hub. ? It all fit together exactly as designed. ? What I like about my Gingery furnace is that the small ATMEL micro-processor that runs the ignition coil and PWM speed control for the fan is completely turnkey.? I walk up to it, plug in power, turn on natural gas, lift and pivot the lid and press the start button.? The Fan comes on at a very slow speed, then spark plug starts making buzzing noises, and then the solenoid that allows the gas through opens and there's a bit of a whump and a very rich flame yellow is coming out the top of the furnace.? Then the fan accelerates up to burn speed and the flame pulls down into the furnace, becomes blue and the noise level increases slightly.? Between 12 and 15 minutes later I have about 5 pounds of melted aluminium. ? Switching it off is much the same.? Turn the switch to off (center position) and the solenoid goes out and the fan blows for a few more seconds to evacuate any fumes or gas. ?Then it shuts off.? I can then lift up the body and pull out the crucible.? By now I've also done any degassing etc.? Once the metal is poured the crucible goes back into the furnace, and the master switch is turned to the other ON position which runs the fan at a very slow speed to slowly cool down the interior.? In the winter it warms the shop up nicely. ? One day I may add the flame detector.? The software is there for it but that requires some reconstruction and I've just not had the time. ? John ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Bill in OKC too via Groups.Io
Sent: December-17-19 4:54 PM To: [email protected] Subject: Re: [digitalhobbyist] Step #1 Encoder ? The acronym is FM, for "freaking magic!" ? It is gorgeous, isn't it? Last aluminum casting I did was pretty good looking until I started cutting it. Found out it was an aluminum sponge. My furnace and such are still on hold. That casting was done at a friend's house, and I didn't have anything to degas the melt. My mold wasn't nearly as good, either. I have a lot to learn yet. That's why I hang out on sites like this one. ;) ? Bill in OKC |
Bill in OKC too