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Type: Posts; User: ger21

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  1. Replies
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    Re: Fixed gantry opinions/possible new build

    You want 10mm-25mm pitch screws if you want speed. 5mm pitch screws will be sloooow.
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    Re: Help with Standard 4x2 Accuracy

    If you tell the machine to move 24", does it move exactly 24"?
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    Re: First Build. Few Q's.

    As Pete said, you don't have any information on the frame. This will have the biggest impact on the machines performance. The best components are only as good as the frame they're bolted to.

    And...
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    Re: HELP HELP WE NEED HELP

    Do you have any documentation on the breakout board? Not sure why you would have two power supplies wired to it? What voltage are those power supplies, and what terminals are they wired to??
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    Re: wiring power to a driver?

    Yes, you have a DC power supply, and a drive that requires AC power.
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    Re: 4824 Pro - controller options

    In this scenario, you'd be much better offer getting running small Nema 34's from the G540. Otherwise, you need to replace the Rack and Pinion drives if you upgrade motors in the future.
    Or, buy...
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    Re: wiring power to a driver?

    AC power does not use positive and negative.
  8. Thread: Masterwood 317

    by ger21
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    Re: Masterwood 317

    Sounds like a mechanical issue, but I really have no idea.
  9. Re: Understanding relationship between pulse per revolution and RPM

    Not necessarily true.

    Depends greatly on the size of the motor, it's inductance, and power supply voltage. I've heard of people with small mills getting a reliable 2500rpm from steppers. But the...
  10. Thread: Masterwood 317

    by ger21
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    Re: Masterwood 317

    Is the spindle on an air cylinder. Might be an air leak?
  11. Re: Nothing Ground Breaking Just Another CNC Router Table Build

    I agree that you need diagonal bracing on the base, or it will sway back and forth.


    If you are going to go the self leveling route, than I'd build the table from an epoxy sand mix, rather than...
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    Re: New UC300ETH breakout board.

    Yes, Weerasak makes the boards and answers all the emails.
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    Re: New UC300ETH breakout board.

    Email CNC Room, he's very helpful.
  14. Re: Help on best route for a 4x8 cnc machine -$10,000 budget

    If you go the used industrial route, make sure you can get it in your garage, or wherever you'll be putting it. It could way 3000-5000 lbs or more, and may require riggers to move it.


    Other than...
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    Re: Gantry or Stepper issue?

    You are running in full step mode. If those drives can be change to 1/8 microstepping, you should do that.
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    Re: Shopping CNCRP Pro 48 vs. Tormach 24R

    I've had my PC on my home network for 10 years, running Mach3 and the parallel port with no issues at all.
  17. Thread:

    by ger21
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    Re: Z²

    Actually, this is a continuation of another thread started in 2007. I think there's a link in the first post. So it'll be 14 years since I started, if I get it running next year.
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    Re: Z axis question. Please help

    Then you may find this to be the weak point. Round shafts are no where near as rigid as linear bearings.
  19. Thread:

    by ger21
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    Re: Z²

    Quick update.

    After a few years, I finally got around to sealing the X axis beams with epoxy. But, it was in preparation for a lengthy delay.


    We bought a new house on the lake. (Pending...
  20. Re: Stepcraft S600 losing steps / backlash hassles. Time to graduate?

    You should be able to fix the lost step issue fairly easily, unless it's caused by mechanical issues. Just reduce the Accel and Velocity until it stops losing steps.

    If you want something better,...
  21. Re: Can I get good results out of a hobby class machine on Acrylic for some PC parts?

    Yes, with a few caveats.

    1) If you want polished edges, you'll need to sand and polish them afterwards.
    2) You'll most likely have tool marks (scallops) on the edges. These can be sanded out and...
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    Re: Z axis question. Please help

    If it's a standard Mechmate using V Rollers and gravity, it'll probably be fine.

    Building a heavy frame with a mechmate doesn't really help much, unless you build it with linear rails instead of V...
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    Re: Another Vacuum Table Question

    What you want for guitar parts are dedicated, gasketed fixtures. You can definitely achieve 14" Hg, IF the material is not porous. If it's porous, vacuum will leak through.

    I have a friend that...
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    Re: Dust collection - CFM for CNC router?

    Yes, I forgot to suggest a jet of compressed air will be the best bet.
    The new industrial routers we're looking at have separate air jets for different cutting directions.
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    Re: Dust collection - CFM for CNC router?

    Flow restriction from the brushes should be negligible. Having a good seal with the brushes insures you'll getr all the airborn dust and chips, which is imo the most important thing. You'll never get...
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