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Type: Posts; User: Drassk

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  1. Replies
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    8,456

    Re: My Fadal 4020 Kflop Retrofit

    Those are good points.

    I had a UPS (uninterruptable power supply) that powered the KFLOP and encoders so that I'd never have to turn it off. Also a hackey solution, but I never lost position!
    ...
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    Re: My Fadal 4020 Kflop Retrofit

    I wouldn't modify the drives unless you're very comfortable with electronics, I had help from a friend who's quite skilled. The original reason I did it was to cut the tachs out of the circuit, as I...
  3. Replies
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    Re: My Fadal 4020 Kflop Retrofit

    Better late than never reply, I suppose, but this is my old machine, and I did that first retrofit! You're at least the fourth owner, as I had to sell it to another guy when I moved into a workshop...
  4. I resemble that remark! That's my old machine on...

    I resemble that remark! That's my old machine on Youtube, just cookin' along. It was a 1994 with metric screws and DC motors. I'd say I have some information, at least, since I did do the...
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    Your biggest problem is going to be calibration...

    Your biggest problem is going to be calibration and making a frame that's stable. On something like that, you're going to need to hold temperature tightly in the room it's in, completely stress...
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    I wish I could afford HSS... HSS tools are for...

    I wish I could afford HSS...

    HSS tools are for rich guys with lots of time; poor machinists like myself need to use carbide so we can feed ourselves and our families :)
  7. I don't think the fact that most people are...

    I don't think the fact that most people are horsepower limited is relevant here. That's like saying engine calcs for sports cars are pointless because most people drive commuter cars.

    In my...
  8. Replies
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    I have the micro AC machine from Everlast and...

    I have the micro AC machine from Everlast and it's been great. The Canadian distributor gives insane levels of support if you have problems (experience of a friend), better than red or blue by a...
  9. Replies
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    35,817

    I have the 185 amp micro TIG from Everlast and,...

    I have the 185 amp micro TIG from Everlast and, besides adjusting the HF gap, am completely happy with it. The support from the Canadian reseller is stellar; they'll ship you parts or a new machine...
  10. A retrofitted Fadal can hit some high speeds. ...

    A retrofitted Fadal can hit some high speeds. With a better control you get smoother motion which really reduces the load on both the screws and the motors/drives. My '94 will feed at 600IPM...
  11. Replies
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    Take this advice as worth what you paid for it,...

    Take this advice as worth what you paid for it, but when I had a cyclical noise on my machine it was the tachometer causing it. I pulled off the end cap and cleaned off the tach with a swab dipped...
  12. Replies
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    That's a happy coincidence...you're in Ontario! ...

    That's a happy coincidence...you're in Ontario! I'm in Halifax, NS.

    Give me a phone number (PM if you like) and I'll call you, it's much easier than typing out specs and questions.
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    If you haven't found a solution yet, I have a...

    If you haven't found a solution yet, I have a 4020 that I'm selling or parting out by the end of the month. It's currently running, under power, and in use. It's been retrofitted with a Dynomotion...
  14. Replies
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    Where are you going to school? I'm in Halifax,...

    Where are you going to school? I'm in Halifax, doing a PhD in Mechanical Engineering at Dalhousie. I know Dal has a lot of foreign students, so I figured the odds might be good.
  15. Replies
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    I like that you're taking measurements, but...

    I like that you're taking measurements, but without a baseline it's hard to say what the spectra are actually showing. Half of it is showing that those two have similar responses, but that only...
  16. Replies
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    That's awfully pretty, Spiro. How long do you...

    That's awfully pretty, Spiro. How long do you expect the whole build will take? I'm really curious about this one!
  17. Replies
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    3,796

    The common opinion is that a lightly built...

    The common opinion is that a lightly built instrument sounds better than a heavily built instrument, and that means using your material optimally to keep mass down. More mass means more resistance...
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    The wood science part is simple: wood isn't...

    The wood science part is simple: wood isn't isotropic, it's substantially stiffer in one direction than the other. The difference between longitudinal and cross grain stiffness is huge. So, for...
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    This is just amazing stuff to see. It's pretty...

    This is just amazing stuff to see. It's pretty cool to see someone going at it without all the worries and indecision and just building something awesome :)
  20. Replies
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    3,796

    Alan Carruth, as part of his record keeping, has...

    Alan Carruth, as part of his record keeping, has a standardized 'tap test' he does where he drops a weighted ball against the bridge and records it with a mic and then does a FFT spectrum on it.
    ...
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    It's a 1994 VMC 4020 with a dash 4 control and...

    It's a 1994 VMC 4020 with a dash 4 control and metric screws.
  22. Thread: CNCBrain users

    by Drassk
    Replies
    202
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    25,715

    I'm using KMotionCNC, the control software that...

    I'm using KMotionCNC, the control software that comes with the board. I don't know of any reason to use Mach instead, but I might be missing something.

    This is a video of the machine running that...
  23. Thread: CNCBrain users

    by Drassk
    Replies
    202
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    25,715

    The Dynomotion stuff works as advertised,...

    The Dynomotion stuff works as advertised, probably better. I've got a 1994 Fadal 4020 retrofitted that will move smoothly at about 3X the factory acceleration, and has no problems feeding accurately...
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    Who buys Fadal parts?

    I retrofitted my machine, replacing most of the electronics and sensors, and now I'm thinking I should probably get a bit more 'work' out of the removed parts than keeping dust off my shelves. I...
  25. The KFLOP is a very good controller, and can...

    The KFLOP is a very good controller, and can handle some serious speeds. I'd put it up against most anything out there, and I'm talking high end industrial controls as well. I retrofitted a 1994...
  26. Thread: Gantry mill

    by Drassk
    Replies
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    41,039

    Just wanted to chime in with another +1 for this...

    Just wanted to chime in with another +1 for this thread. It's great to see a different methodology (real engineering!) in a build thread!
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    I'm eager to hear your results. I'd like to put...

    I'm eager to hear your results. I'd like to put together an EDM 'head' to stick in my mill to burn out taps etc, but it seems like a waste to make a non-pulsed version when the pulsed ones work so...
  28. It won't run, says my resolution is wrong (but it...

    It won't run, says my resolution is wrong (but it isn't). Might not be compatible with 2011 or Windows 7.
  29. I'm pretty sure you can mod the 58XX series as...

    I'm pretty sure you can mod the 58XX series as well, but not the 6K cards. As I said above, the 4870 I had modded worked quite well and I'd still have it if it wasn't for HIS putting faulty fans on...
  30. Those measures are in seconds, not frames per...

    Those measures are in seconds, not frames per second. Lower is better.
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