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Type: Posts; User: awerby

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  1. Re: Z axis goes up but not down intermittently

    I wouldn't rule out mechanical issues so fast. For instance, if you had a broken helical coupler, the broken ends would still push in one direction, but would slip in the other.
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    Re: New drivers and motors, need some advice

    I'd say use the breakout board you've got; if it gives you problems you can always replace it. Similarly, I'd give the Workbee a chance to work before tearing it apart; holding torque isn't the only...
  3. Re: Request for feedback on a 4/5th axis for a CNC drill

    Have you ever tried drilling a hole that way? As Pete points out above, it's not really going to work without getting in there with another tool and making a starting place for the drill tip. Without...
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    Re: 4 Axis CNC by Arduino

    I'm not sure the MaxNC will have enough accuracy to engrave dials for other machines - you want something like that to be right on. Your best shot would be to use the 4th axis for that, and avoid...
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    Re: Newbie help please

    I assume this is for the spindle, right? Some induction motors will reverse directions, others won't. To find out, remove the plate that covers the wire inputs. If it's reversible, there should be a...
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    Re: My new DIY metal CNC machine.

    You're kidding, right? Or itching a lot?

    https://www.monash.edu/ohs/info-docs/safety-topics/chemical-management/carbon-fibre-composites-ohs-information-sheet

    Invest in Tyvek pajamas...
  7. Re: New Machine Build - Massive CNC router for timber components

    If you want to cut joinery on the ends of these beams, consider providing a tilting mount for your spindle. The options for cuts are limited if you can only approach the beam from the side; if you...
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    Re: CNC Vertical Milling Machin

    I've tried various solutions to this problem: constant-force springs, regular coil springs, etc. What worked best for me were gas struts, sized to compensate for the weight of the spindle assembly....
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    Re: CNC table with epoxy granite

    "But let me know, what do you think I could improve on in the future?"

    The best single thing you could do would be to replace those round rails with profile rails and trucks. Next best would be...
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    Re: CNC machine made out of granite

    [This is true; you want to do any granite cutting with plenty of water coolant, and clean up thoroughly afterwards to avoid residual dust.]
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    Re: CNC table with epoxy granite

    An epoxy-granite table like that will be just about as heavy as a natural granite one. And you'll still have problems attaching things to it. But with a machine like the one in your picture, where...
  12. Thread: CNC 'jumps'

    by awerby
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    Re: CNC 'jumps'

    Those look like the aluminum helical couplers I had on a machine of mine, that did the same thing. I replaced them with Oldham style couplers - the kind with a rubber "spider" in between the two...
  13. Re: NOT 90 DEGRRE CORNERS IN CUTTING A SQUARE

    This might be happening because you have "constant contouring" set in Mach3. Try "exact stop" and see if it helps.
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    Re: Need a replacement stepper

    It's hardly ever the fault of the stepper motor itself. Try lowering the acceleration.
  15. Re: Process for making very small mm scale metal parts and applications to target

    It sounds like Microfabrica has a patent on this process. If you violate it by setting up the same thing in competition with them, don't expect them to let it slide.
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    Re: Axis movement problem.

    If the pin popped out when the stepper was powered up, it may have generated a spark that damaged the driver for that axis. Try replacing it and see if the problem goes away. If not, you've got a...
  17. Re: Running a Gerber Sabre 408 Without a Spindle

    Read the manual that came with your VFD, There's probably a way to connect it to the Gerber control so that the control issues a signal which varies in voltage (usually 1-10, or 1-24) that controls...
  18. Re: Rookie question on minimum spindle speed of a HSD spindle

    It sounds like your machine came with a general-purpose controller which is suitable for a range of spindles, not just the HSD. I wouldn't run the HSD much lower than 18,000 RPM. Just don't use the...
  19. Re: Wanting to build 4x2 4 axis machine. Where to start

    If this machine is to be dedicated to 4-axis work, I'd say keep the Y axis short, like 24" or less. Profile rails are a good idea; they're much more rigid than the round ones. Keep the Z axis short...
  20. Thread: CNC 'jumps'

    by awerby
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    Re: CNC 'jumps'

    I doubt that a crash like that would disrupt your software settings. But it certainly could throw bolted-on rails out of alignment. If there are suddenly a few places where the motion of an axis...
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    Re: How to Start Clothing Business from Zero?

    Get some clothing. Sell it. Repeat with more clothing, etc.
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    Re: CNC converted G0602 is all over the place.

    That doesn't look too bad to me. A lathe like that isn't going to reliably hold tolerances finer than .001", and if you're off by .0005" you have to double the inaccuracy on a turned part. Spend...
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    Re: The spindle is not starting

    Is there an interlock between the water cooling system and the spindle's on-off function? Is the pump running when you're trying to trigger the spindle?
  24. Re: Need help, building CNC machine for steel and wood

    I'm looking at your picture and trying to figure out what's going on. It looks like you've got two frames mounted vertically, quite close together, that each have a narrow stage which moves up and...
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    Re: Need advice on my 24" Y axis build

    [It would be easier to help with this if everything was in the same thread. Are you building your own clay extruder, or buying one prefabricated?]
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