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Thread: What did you machine today?

  1. #1291
    Join Date
    Dec 2008
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    Kendal, On
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    Puting some precision "scratches" in a nice new job. @7:00 on a Friday night..... Almost home time.

  2. #1292

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    A hand wheel that just had bolts to turn it. I ordered some threaded knobs, and threaded some rods on the lathe. Simple project, but it is so much better than the bolts.


    Last edited by junkaddict; 02-16-2019 at 10:57 PM.

  3. #1293
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    Dec 2008
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    Made some quick and dirty drive hubs for a yarn skein winder last night. Milled from square scrap and faced the backside. They ain't pretty, but they'll work.

    Should be able to get the rest of it completed this weekend minus the drive motor and yardage counter/controller. The plan is to be arduino based, but I'll have to fire up the noggin and do some thinking for that part. I havn't done any "practical" arduino projects yet, nor wrote any custom code, so It will be a learning experience. But, that's the whole reason I got one (and all the other related electrical stuff), so.....

  4. #1294
    Join Date
    Nov 2017
    Location
    Watford, UK
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    Dan: Was going to suggest an optical gate that a protrusion on the wheel breaks every time it turns but that would only give you a rev count and not yardage since the diameter would change as the yarn winds over previous windings. You might have to have some sort of wheel that the yarn passes over (and turns) and then count the revs of that. You could tell direction of travel as well if you used two gates with a slight offset between them so that gate 1 fires before gate 2 if winding on and the reverse if winding off. There's also rotary encoders that may do this in a more compact package. Just some random thoughts for you....on the off-chance they're useful

  5. #1295
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    Dec 2008
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    Quote Originally Posted by Cenedd View Post
    Dan: Was going to suggest an optical gate that a protrusion on the wheel breaks every time it turns but that would only give you a rev count and not yardage since the diameter would change as the yarn winds over previous windings. You might have to have some sort of wheel that the yarn passes over (and turns) and then count the revs of that. You could tell direction of travel as well if you used two gates with a slight offset between them so that gate 1 fires before gate 2 if winding on and the reverse if winding off. There's also rotary encoders that may do this in a more compact package. Just some random thoughts for you....on the off-chance they're useful
    To calculate the yardage I was planning on having an input into the controller based on the position of the arms. There are marks (well not yet, but there will be) on the arms for 1, 1.5, and 2 yards. I bought some hall effect sensors, and was planning on counting that way, but an optical sensor sounds interesting too. Never thought of that. The offset gate idea also sounds great, and I'll file that away for future uses. This electrical land is all new to me. So much to learn.....and so many possibilities.

    Would an optical sensor be more reliable than a hall effect sensor? I just looked them up (in between typing this all up), and I think I could make one work, and it might be easier to implement. Where and why would one use one over the other? (can of worms maybe?)

    The wife (and her friends) are keeping keeping me busy with things to make, and products to "invent" for her yarn dyeing business. This is a small niche market and some products already exist, but there are a few things that I've thought of to do different and help streamline her process and make it more efficient. I want to start doing small batch runs of products and see how they sell. Maybe it works out, maybe it doesn't, we'll see. A skein winder was actually not something that I was interested in doing at all, as there are already a few small companies making them already and I hate "copying" people unless I can think of a different way to do it (I have). But she need's one and with a lead time of 2-4 weeks, and $1500 I opened my big mouth and said "I can make that..." you know how it goes..... She won't get the fancy controller yet, it's a planned upgrade (parts on on the slow boat), but I hope to have at least an armstrong model working by the end of the weekend. I think I've got a mechanical counter somewhere she can get by with until I figure out the magic pixie version. She's got a couple big shows coming up and there's yarn everywhere in the house waiting to be skeined up, as that's one of her major bottle necks right now (the other being a full time job). She's tried employing child labour this week on March break, but it turns out a 4 and 6 year old cannot be reliably trusted to run an umbrella winder lol .

  6. #1296
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    Nov 2017
    Location
    Watford, UK
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    I'd love to tell you how I have lots of experience with both ways and can tell you the pros and cons....but to be honest all I've got is a collection of random knowledge acquired by osmosis and some ideas because it sparked some curiosity of the 'Hmm, now how would you do that?' variety.

    My colleague always used to joke about rearing his own child-labour back in the days when there was any money in building 10, 20 PCs for a customer. His eldest is something like 12 and there's no sign of cheap labour yet. These things seem to take a lot of maturing before there's a return of investment!

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