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  1. TheMotionGuy

    manually measured thread.. stupid question.

    I've been asked to have some parts re-made.. But the old drawings have been lost in the abyss. So, I had to get out my thread gauge and micrometer/caliper. The question is: If i measure a male thread at 1-5/8"-12, and the female at 1-1/2"-12. What am I going to call out for the respective...
  2. TheMotionGuy

    What does this mean exactly

    Quick question. I'm not sure what this individual is referring to exactly. Does the parallelism call-out apply to the length of the shaft? And does the flatness apply only the bottom face of the square piece? Thanks
  3. TheMotionGuy

    Cutting Polycarbonate/PEEK

    Good afternoon all. I am trying to cut some polycarbonate and I have also tried cutting some PEEK because I have a high-temp application where my acrylic substrate just wont do. But when I cut it, I get severe discoloration. I have tried every combination I can think of to reduce the amount of...
  4. TheMotionGuy

    Press fit into nylon

    I need to press fit a metal threaded insert into a piece of nylon. Does anyone have advice on how much interference would be adequate? I generalize by saying metal because I was thinking of using brass or steel.. is there another material that would be better suited for this application? It...
  5. TheMotionGuy

    National Pipe Thread

    I am not completely familiar with NPT. How do you read an NPT callout. I know we don't need to call out depth, as that is per machining spec. The callout is a 1/8-27 NPT. Is the 27 just referring to threads per inch? And since an NPT hole is tapered, is 1/8 the diameter of the inside part of...
  6. TheMotionGuy

    Material Selection

    Anyone familiar with a viable material that is CO2 laser friendly (probably available in a range of thicknesses from 0.1mm - 0.7mm)that can stand an operating temp around 150C(300F)? Currently we are using an acrylic substrate but for this application the thermal effects kill it. note: I am...
  7. TheMotionGuy

    Flatness

    Hey guys, Does anyone know what kind of flatness I can achieve when having Nylon 101, Delrin, or Teflon machined? Is asking 0.05 asking too much? (need to know for each material if you have experience working with them). Thanks, Dale
  8. TheMotionGuy

    Ideas to get a cleaner cut? (fiducial)

    I am in need of some ideas to help my brainstorming. I need to get a cleaner cut than the attached picture. Currently, we are using a laser CNC but unfortunately they polymer we have on the bottom is very soft and it gets kind of torn up when we cut it. These holes are used for fiducial...
  9. TheMotionGuy

    Millwrite

    Hello, I am currently setting up our laser cutting CNC and the package came with Millwrite software... Has anyone used this software that can let me in on the pros and cons? Also, can I import .DXF or some other format of drawing file into this software? I can't seem to find much info about...
  10. TheMotionGuy

    Fitting two plastic parts

    Hello, my first time here on the forum. Anyhow, I deal mostly with the optical inspection systems here at work and I've been doing that for quite a while...but my boss asked me to prototype something for him that is out of my realm of expertise... It is simply a 4" round disk, 3/8" thick of...

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