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  1. #21
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    Jul 2004
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    1458

    Re: Clear path servos

    Quote Originally Posted by Gravelleknives View Post
    I didn't specify, but I do use PP.
    Nice job on your vacuum pallet changer, btw. A piece of art.
    Tim
    Tormach 1100-3, Grizzly G0709 lathe, Clausing 8520 mill, SolidWorks, HSMWorks.

  2. #22
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    Feb 2006
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    7087

    Re: Clear path servos

    Quote Originally Posted by Gravelleknives View Post
    Just checked, the lead is .2.
    It is almost certainly 5mm lead, not 0.2"...

    Regards,
    Ray L.

  3. #23
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    Jun 2008
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    467

    Re: Clear path servos

    Really Ray,

    .19685 lead verses .2000 lead
    Did someone deprive you of your morning cup of cappuccino?
    Live from downtown Burbank, home of the free endless Cup-O-Joe
    JoeyB
    A doughnut a day keeps the doctor away.

  4. #24
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    May 2014
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    27

    Re: Clear path servos

    Quote Originally Posted by SCzEngrgGroup View Post
    It is almost certainly 5mm lead, not 0.2"...

    Regards,
    Ray L.
    You got me, as I reached under the table with my micrometer I had it set to inches and didn't think to check mm.

    Sent from my SM-G900V using Tapatalk

  5. #25
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    May 2014
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    27

    Re: Clear path servos

    Quote Originally Posted by tmarks11 View Post
    Nice job on your vacuum pallet changer, btw. A piece of art.
    Thanks, i use it every day.

    Sent from my SM-G900V using Tapatalk

  6. #26
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    Feb 2006
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    7087

    Re: Clear path servos

    Quote Originally Posted by joeybagadonuts View Post
    Really Ray,

    .19685 lead verses .2000 lead
    Did someone deprive you of your morning cup of cappuccino?
    Live from downtown Burbank, home of the free endless Cup-O-Joe
    JoeyB
    If someone is going to swap out the motors on their machine, they need to know the CORRECT screw lead to calculate steps/inch or steps/mm when they re-configure the CNC software. Some people can be kinda fussy about their machines accuracy. But, if you're OK with your machine being off by more than 3 thou per inch, then by all means round yours off to 0.2".

    Regards,
    Ray L.

  7. #27
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    Jun 2008
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    467

    Re: Clear path servos

    Ray,

    I acknowledge there is over three thousandths of an inch difference, however the conversation or question is about enhancing the machine's feed rate.
    Please, take a minute and loosen up your jockstrap.
    Live from downtown Burbank home of the world famous twisted jellyroll.
    Joey B



    Quote Originally Posted by SCzEngrgGroup View Post
    If someone is going to swap out the motors on their machine, they need to know the CORRECT screw lead to calculate steps/inch or steps/mm when they re-configure the CNC software. Some people can be kinda fussy about their machines accuracy. But, if you're OK with your machine being off by more than 3 thou per inch, then by all means round yours off to 0.2".

    Regards,
    Ray L.
    A doughnut a day keeps the doctor away.

  8. #28
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    Dec 2010
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    1218

    Re: Clear path servos

    Joey read your own occupation and do your job.

    Sent from my SM-G935V using Tapatalk

  9. #29
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    Sep 2009
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    1856

    Re: Clear path servos

    too funny
    http://danielscnc.webs.com/

    being disabled is not a hindrance it gives you attitude
    [SIGPIC][/SIGPIC]

  10. #30
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    Dec 2008
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    630

    Re: Clear path servos

    Quote Originally Posted by SCzEngrgGroup View Post
    It is almost certainly 5mm lead, not 0.2"...

    Regards,
    Ray L.
    You and WOT both owe Joey a doughnut. The Tormach ballscrews have a 0.2" pitch.

    Step

  11. #31
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    Jun 2004
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    6618

    Re: Clear path servos

    For Mach 3, the actual lead value of the screw is unimportant once you get close. You can then dial it in after initial setup. For path Pilot, you really need to know exactly what you have. It doesn't have a nice easy calibration feature. You can can calibrate it, but it requires updating a file to do it. Much more of a process than Mach 3 uses.
    Lee

  12. #32
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    Dec 2008
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    630

    Re: Clear path servos

    Quote Originally Posted by LeeWay View Post
    For Mach 3, the actual lead value of the screw is unimportant once you get close. You can then dial it in after initial setup. For path Pilot, you really need to know exactly what you have. It doesn't have a nice easy calibration feature. You can can calibrate it, but it requires updating a file to do it. Much more of a process than Mach 3 uses.
    So you'd set up mach 3 to somewhere in the ballpark, say 5mm pitch, and then calibrate it to adjust for the fact that the Tomach uses 0.2" ballscrews!!! Oh dear.....
    Assuming we're talking about a 1100, these are P4 ground ballscrews! According to Tormach:
    "We use a ground ballscrew, P4 grade with a double nut. P4 accuracy specification is 0.0006” per foot and is 100% inspected using a laser interferometer."
    Just set the correct value and forget about it. No calibration required. The difficulty in calibration is not the editing of the file, rather in achieving a measuring accurately that's higher than the accuracy of the ballscrews.
    Step

  13. #33
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    Jun 2004
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    6618

    Re: Clear path servos

    I was simply pointing out a difference in the two operating systems. If you know the lead value, then of course use it. Just because you have a known lead value does not mean that it is perfect either. Calibration can be a useful tool. You seem to dismiss it's value, but I do use it. It's result does change the step count in almost all cases. On the Novakon Pulsar, it was so little that I just left well enough alone and used the stated value of the lead. It now runs under Path Pilot, so I was sure that no calibration was needed. The same may very well be true with most Tormach mills, but to change it is not as easy with Path Pilot.
    Lee

  14. #34
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    Mar 2008
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    218

    Re: Clear path servos

    "I'm pretty sure the Tormach stepper drives are powered directly from the AC line"

    Nope, they are powered from a 500 Watt transformer producing a 60 VDC (nominal) supply.

  15. #35
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    Mar 2008
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    218

    Re: Clear path servos

    I talked with Greg Jackson about the actual lead screw pitch several years ago and he specifically stated that the lead screw pitch on all three axes was 200 mils and NOT 5mm. So unless Tormach has made a change since then the lead screws are imperial 0.200 inch and NOT a standard metric pitch.

  16. #36
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    May 2014
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    27

    Re: Clear path servos

    I think the election has put everyone in an argumentative mood lol.

    Thanks for all the good information guys. This is definitely something a may consider in the future and I'll definitely be using clear path servos on my router build.

    Sent from my SM-G900V using Tapatalk

  17. #37
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    Apr 2015
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    93

    Re: Clear path servos

    I have used them before in other machines and automation equipment including routers. Very great performance with very high accelerations which is very beneficial for 3d machining. The cost/benefit ratio for installing them in the Tormach 1100 though, just really is not worth it. The mill does not have spindle speed to feed small tools fast, or enough power to feed large tools fast.

  18. #38
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    1458

    Re: Clear path servos

    Quote Originally Posted by Gilmax View Post
    The mill does not have spindle speed to feed small tools fast, or enough power to feed large tools fast.
    Unless of course, you install a water cooled high speed spindle....
    Tim
    Tormach 1100-3, Grizzly G0709 lathe, Clausing 8520 mill, SolidWorks, HSMWorks.

  19. #39
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    Apr 2015
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    Re: Clear path servos

    Yes I suppose for certain specific applications it may be worth it to some users.

  20. #40
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    463

    Re: Clear path servos

    Quote Originally Posted by tmarks11 View Post
    Unless of course, you install a water cooled high speed spindle....
    +1

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