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Type: Posts; User: Gir

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  1. Replies
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    Oh baby, that looks solid! Good job!

    Oh baby, that looks solid! Good job!
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    Heh, that much I'm thankful for! Her initial idea...

    Heh, that much I'm thankful for! Her initial idea was polka dots! (nuts)

    BTW, I obviously decided to go with the torsion box for the base, and boy is it solid! I ran some physical simulations in...
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    Hey guys, I've made a lot of progress recently....

    Hey guys, I've made a lot of progress recently. I've been bogged down with some other house work lately but finally found some time to get the actual construction done.

    So. One thing I should...
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    It will probably be advantageous to build two...

    It will probably be advantageous to build two machines like you pointed out. To get the accuracy needed on a 3'x3' machine for milling PCB's could prove expensive.
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    Good point. If you do use the fiberglass, make...

    Good point. If you do use the fiberglass, make sure to at the very least wear a protective mask so you're not inhaling any of that stuff.
  6. Thread: Limit switch Error

    by Gir
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    653

    Sounds more like a vibration issue. Wiring your...

    Sounds more like a vibration issue. Wiring your switches normally open will fix chatter issues (unless you're getting some really bad vibes), and wiring your switches normally closed will help with...
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    fab@home might be fun, but it's also a bit...

    fab@home might be fun, but it's also a bit pricey, IIRC. I think a small desktop machine would be fun.
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    They also build model planes out of balsa wood,...

    They also build model planes out of balsa wood, but I wouldn't be building a router out of one.

    Comparing planes to a router is nonsensical. The wings in a plane are designed to act as shock...
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    Just to clarify, the egg cartons and egg crate...

    Just to clarify, the egg cartons and egg crate foam work fairly well for just lowering the sound a bit, but the rigid fiber glass is pretty much as good as it gets in the lowish price range. It will...
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    Using rigid fiber glass insulation wrapped with...

    Using rigid fiber glass insulation wrapped with felt absorbs sound very well. It's pretty cheap and it's easy to make. Owens Corning 703 is very good, but the other numbers have different ranges of...
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    Oh, stupid me! That makes much more sense now!...

    Oh, stupid me! That makes much more sense now! I'm fully behind your theory now ;)

    Heh, I know what you mean. I always have to explain Calculus to one of my mathematically impaired friends at...
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    I believe these types of models will model the...

    I believe these types of models will model the joints as though they're fully connected and won't give (other than the materials elasticity and such). This is probably a very accurate model, provided...
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    That makes a lot of sense and explains a lot, but...

    That makes a lot of sense and explains a lot, but it sounds like by using a centrifugal method you will be taking out an important key to the equation - randomness. Instead of shaking and moving...
  14. Thread: Limit switch Error

    by Gir
    Replies
    8
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    653

    There's either a lot of vibration causing chatter...

    There's either a lot of vibration causing chatter or a lot of noise in the line. Try using a shielded cable to run the limit switch.
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    Let me start this off by saying I really have no...

    Let me start this off by saying I really have no clue when it comes to the mixes that you're making. That being said, won't it always separate the mixtures unless it's slightly hardened? Or is that...
  16. Thread: First CNC ever

    by Gir
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    355

    These boards are very simple and not very good....

    These boards are very simple and not very good. You're probably better off going with a gecko, but if you're trying to save on money and feel like assembling your board, hobbyCNC makes pretty good...
  17. Thread: First CNC ever

    by Gir
    Replies
    5
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    355

    Servos are "best", but steppers are far cheaper...

    Servos are "best", but steppers are far cheaper and far more practical for what it sounds like you want to do. If you have the spare money, however, servos would be better for PCB's. But be prepared...
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    Whew, glad to see you separated it into more than...

    Whew, glad to see you separated it into more than one page! Good luck!
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    Heh, that's pretty much what's happening to me!...

    Heh, that's pretty much what's happening to me! My goal has been hitting it under $700, but it's looking more like $900 (maybe $1000).
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    I believe you can also tension the screw by...

    I believe you can also tension the screw by putting an end nut on the opposite side of where it is mounted, which will increase your effective RPMs in the screw.
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    So I was working on the shaft coupling today and...

    So I was working on the shaft coupling today and I've hit a bit of a conundrum. I've got a 1" dia x 2" delrin rod, 1/2" hole on one side and 1/4" on the other. I've got a slit down the center of it...
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    Drawing perfect circles can become a very...

    Drawing perfect circles can become a very computationally intensive task. If you're using AutoCAD, there's a setting for how many lines to use to render circles. You can set this anywhere from 4 to...
  23. Thread: my first attempt

    by Gir
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    Looks like a great start. Looking forward to...

    Looks like a great start. Looking forward to seeing it cut!
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    Gerry, I was just taking another look at the ribs...

    Gerry, I was just taking another look at the ribs you came up with and I was curious how you're assembling them. Do the ribs have slots to fit together like linking logs or are the vertical ones...
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    Those would be dovetails I suppose (but flat).

    Those would be dovetails I suppose (but flat).
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    To touch on that, as long as it's around 800MHz...

    To touch on that, as long as it's around 800MHz you're probably fine. 500MHz is where I've seen people having trouble.
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    If you're not into spending a whole of money for...

    If you're not into spending a whole of money for this and just like it as a small(ish) hobby, you could build your own machine for much less than $6000. Given, the $6000 will get you a much sturdier...
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    Update time! Alright, so there's really not...

    Update time!

    Alright, so there's really not much to update about. All I did was install my voltmeter and ammeter in my power supply. But I thought it looked pretty cool so I thought I'd share some...
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    Another quick update. I got all three of my nuts...

    Another quick update. I got all three of my nuts tapped and running smoothly. Tapping the blocks then freezing them and tapping it again really helped. They run pretty smoothly with no backlash, just...
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    Small(ish) update. Got my linear guides put...

    Small(ish) update. Got my linear guides put together. They're 9, 6 and 4.5 inches long. The 9" ones are for the X axis, and the 6" ones I was going to use for the y, but I was thinking about the...
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