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Type: Posts; User: Goemon

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  1. Re: How is everyone building a DIY CNC router system that maintains cutting tolerance

    Given the complexity in the factors that contribute towards accuracy (or inaccuracy), I doubt such a test would tell us anything conclusive. Even if everyone was cutting the same wood from the same...
  2. Re: Need simple DIY CNC machine my son and I could build?

    If the goal is to have fun and get closer to your son, I'd go with one of the simple t-slot kits.

    The learning curve and difficulty in building a diy machine from scratch can make it very...
  3. Re: How is everyone building a DIY CNC router system that maintains cutting tolerance

    "off topic" is a matter of perspective here. The thread title is a somewhat leading question in that it assumes that most people are in fact building diy machines capable of precision. My contention...
  4. Re: Running my CNC machine in a van with a portable gas generator?

    My understanding is that you'd need to derate the generator to run a cnc spindle. I.e for a 9.5a 240v spindle, get a generator capable of at least 19a.

    Also, if it is a 3 phase spindle (as most...
  5. Re: How is everyone building a DIY CNC router system that maintains cutting tolerance

    Accuracy for cnc machines or parts is usually linked to a limited distance. I.e. It's not accuracy of 0.01mm, it is accuracy of 0.01mm over 12" or some other distance. Without the qualifying...
  6. Re: How is everyone building a DIY CNC router system that maintains cutting tolerance

    Moving heavy machines or parts is certainly daunting for the diy enthusiast. My experience has been that it becomes a lot less daunting once you have the right kit. Even with a lot of help, you're...
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    Re: Granite and steel gantry router

    Nice build. It makes so much sense to use a granite surface plate as the base for diy cnc machines. They are relatively inexpensive. They arrive flatter and squarer than any diy machine bed ever...
  8. Re: How is everyone building a DIY CNC router system that maintains cutting tolerance

    The Bridgeport retrofit kits look relatively straightforward to install to me. The main thing that scared me away from them (or other mills) was the weight. When you're at a residential address with...
  9. Re: Working man with goal - open floor - stone tile portable cnc

    When in doubt, just copy the design of cnc machines that were made for cutting whatever you want to cut. E.g.

    ...
  10. Re: How is everyone building a DIY CNC router system that maintains cutting tolerance

    I dunno, there seems to be a lot of hobby builds and many of those are first timers with little to no prior experience. Learning as you go is part of the fun. There is a whole industry supporting...
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    Re: My carbon fiber CNC gantry

    That is true. I've seen that where people try skinning a wooden object with one layer of cf to "make it stronger". That sort of thing shows a misunderstanding of how the material works.

    I have...
  12. Re: cheapest lathe / minimum spec to turn steel?

    None of my pcp rifles have a taper on the barrel. I'm not sure if that guy put one on his but it's not a general requirement. I understand that you can do basic turning and threading on most lathes....
  13. Re: How is everyone building a DIY CNC router system that maintains cutting tolerance

    It doesn't have to be a Bridgeport specifically. Obviously it is for the individual to search for machines or parts based on their specific needs.

    If you have a budget of $4000 for a diy build, it...
  14. Re: How is everyone building a DIY CNC router system that maintains cutting tolerance

    "Tooling board" means different things depending on your industry. In my world, a tooling board is a large slab of plastic or hard wax intended for cnc machining master plugs or molds. I can't see...
  15. Re: How is everyone building a DIY CNC router system that maintains cutting tolerance

    Whatever cnc project you take on for the first time, there is certainly a long learning curve. I agree that retro-fitting older machines has it's own difficulties. But, hooking up stepper motors,...
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    Re: End Mills - Expectation vs reality

    It could be smoke and mirrors. They seem to be blasting the heavy-metal music and it seems to get louder for the more demanding cuts. Maybe they are suffering the same vibration and noise...
  17. Re: How is everyone building a DIY CNC router system that maintains cutting tolerance

    That all sounds like more hassle and money than it is worth. If I am going to add epoxy to something, It would be better to add it to carbon fiber or fiberglass.

    Unless the layer of epoxy is very...
  18. Re: How is everyone building a DIY CNC router system that maintains cutting tolerance

    It obviously depends on what you plan to cut and how much travel you need.

    My point was that, whatever your needs, it is worth checking to see what used machinery you can find for the same money...
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    Re: End Mills - Expectation vs reality

    I'm no expert but my personal experience has been that cutting too slow is just as likely to cause issues as cutting too fast or deep. Whenever I try to baby my machine, I seem to end up with a...
  20. Re: Linear rail conversion side plate material selection.

    The advantage of using mic6 tooling plates is that they arrive relatively flat out the box. The thicker pieces (3/4" +) are flat to tolerances that are likely to be acceptable for what most people...
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    Re: My carbon fiber CNC gantry

    That simply does not happen with properly made parts unless they are not designed with a wall thickness and shape that is appropriate for the load. Nobody should be trying to cut it close.

    Making...
  22. Re: How is everyone building a DIY CNC router system that maintains cutting tolerance

    Given that you can pick up used Bridgeports starting at $2000 (for a working one), I think it is always worth starting with an honest appraisal of whether you can really make something better than...
  23. Re: Can you take step / direction from G540 to run old analog servo motor?

    OK, so I would need to figure out how to connect the encoder cable. I feel a migraine coming on....
  24. Re: Is there any actual upside to gear-free DC spindle motors?

    The specs on the AT and LMS site don't support this claim. Both show constant torque up to the base speed and, in both cases, the base speed on their DC spindle motors is a good bit higher than your...
  25. Re: Is there any actual upside to gear-free DC spindle motors?

    The poor documentation from AT and little Machine Shop certainly does not help here.

    I'm not really clear on what you are saying about how these DC motors differ from induction motors. When I cut...
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