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Type: Posts; User: GME

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    Re: CRP4896 Standard to Linear Rail Conversion

    David,

    Here's a technique for measuring flatness that mactec54 wrote in one of my threads.

    "A simple small roll of piano wire ( .020 Dia or similar can be smaller dia ) and feeler gauge set...
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    Re: CRP4896 Standard to Linear Rail Conversion

    I'm still watching. I'm curious about the technique you used to position the linear rails. The current Avid kits use what they call a "rail alignment jig" to set the rails at each end and at the...
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    Re: Saturn 2 4x4 w/ Nema34 closed-loop - In Canada

    Compression bits are upcut on the bottom, and downcut on the top. So, if you are cutting in passes, the first passes are with the upcut. As you've learned, upcut=chipping. David's posting above...
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    Re: GME's New 80/20 CNC Build - My Design

    I know what you mean about putting the VFD in a separate cabinet can give a false sense of security re EMI. I put mine in a separate cabinet mistakenly believing it would make a huge difference. It...
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    Re: GME's New 80/20 CNC Build - My Design

    Thanks, Bill. Funny, but I didn't have problems with my first machine, which ran on the same electronics. I'm guessing that it had to do with physical separation. With my first machine, the VFD...
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    Re: GME's New 80/20 CNC Build - My Design

    Thanks, Steve. It was a bit scary taking on the twist. I worked on it in my head for days, before putting my hands on. Lot's of preparation paid off.

    The noise filter is a TDK-Lambda...
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    Re: GME's New 80/20 CNC Build - My Design

    Overdue for an update.

    Call it a touch of OCD, or whatever, but I just couldn't let go of the gantry issue. So, I fixed it. I first trammed the gantry (front to back) with the Z axis to the...
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    Re: CRP4896 Standard to Linear Rail Conversion

    Bling indeed. Very nice. The texturing looks great!

    Gary
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    Re: Saturn 2 4x4 - Nema 23

    Have you tried the blue tape and super glue mounting trick, Jack? Great holding power, but easy to remove. Here's a video on it:

    https://www.youtube.com/watch?v=3uTsQ3dYRrk&t=5s

    Here's...
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    Re: GME's New 80/20 CNC Build - My Design

    The saga continues . . .

    To get to the numbers I needed, I started by leveling a 3/4 glass plate on the spoilboard. I used 2 setups, one on the extreme left, and another on the extreme right. ...
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    Re: GME's New 80/20 CNC Build - My Design

    Thanks, Bill. Certainly a possibility. To make it work, I'd have to use 100% (or maybe 90%) stepover. Otherwise, I would risk cutting down some of the angle with each succeeding pass. As I noted...
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    Re: GME's New 80/20 CNC Build - My Design

    Thank you, Gerry. Cloud lifted. Your statement, "[a]s you reduce the stepover, the ridges get smaller, but only because subsequent passes are removing the high spots left from the previous pass"...
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    Re: GME's New 80/20 CNC Build - My Design

    I guess I'm just dense, but I'm not following. I don't understand what the bit diameter has to do with the issue.

    Full Disclosure: I inadvertently misreported that my spindle set out in front of...
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    Re: GME's New 80/20 CNC Build - My Design

    Nope. My shop is in my house. We have a heat pump. Totally climate controlled. If there's any movement, I'm confident it wouldn't be measurable.
    Gary
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    Re: GME's New 80/20 CNC Build - My Design

    Not necessarily. The beam is 6" high and the bit sets out in front of the beam by about the same amount. So, there is a 1:1. The fact that the bit sets lower when cutting should make no...
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    Re: Z-axis overshooting sometimes

    Yes. And you cut off a small section of the outer cover inside the box, exposing the shielding. Using some sort of fixture, ground the shielding to the box's ground plane. Although not idea, you...
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    Re: GME's New 80/20 CNC Build - My Design

    I decided to make myself feel better about the twist in the gantry beam. What I'm seeing could well be what came from 80/20. Their stuff isn't perfect, and the folks at 80/20 don't claim it is. If...
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    Re: Z-axis overshooting sometimes

    New information we didn't know before. As you've already identified, you have a noise problem.

    1. Have you been using dust collection, and if so, do you have it grounded with a bare braided...
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    Re: GME's New 80/20 CNC Build - My Design

    Thank you, Bill.
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    Re: GME's New 80/20 CNC Build - My Design

    Also included in the set up process was surfacing the spoilboard and doing a final tram of the spindle. It's at this point I encountered a problem.

    When I surfaced the MDF, I felt some minor...
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    Re: GME's New 80/20 CNC Build - My Design

    Here's a continuation of the previous post.

    https://www.cnczone.com/forums/attachment.php?attachmentid=427476&stc=1


    This photo depicts what I'll call "side curtains" I installed on the...
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    Re: GME's New 80/20 CNC Build - My Design

    I'm long overdue for an update. I've finished my spoilboard.

    https://www.cnczone.com/forums/attachment.php?attachmentid=427466&stc=1

    This picture shows much of the beginning layout. The...
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    Re: GME's New 80/20 CNC Build - My Design

    Hello, Bill,

    I'd be more inclined to resaw it down in size and use it to line chests. To my oh so delicate olfactory senses, it can get overwhelming pretty quickly when in open air. So, are you...
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    Re: CRP4896 Standard to Linear Rail Conversion

    Can't wait to see how the anodizing comes out. Hope all goes well with installation of the linear rails. Lots of pictures, please.

    Gary
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    Re: Z-axis overshooting sometimes

    I used to have a Fineline machine with the ACME screw and had exactly the same problem you are describing. The machine worked fine for quite some time. Then, suddenly the problem manifested. Had...
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