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View Poll Results: How fast can your Homemade CNC cut?

Voters
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  • less than 10 IPM (4.2mm/s)

    45 7.31%
  • 10-50 IPM (4.2 - 21 mm/s)

    182 29.55%
  • 50-100 IPM (21-42 mm/s)

    142 23.05%
  • 100 - 300 IPM (42 - 127 mm/s)

    147 23.86%
  • 300 - 600 IPM (127 - 254 mm/s

    52 8.44%
  • faster than 600 IPM (254 mm/s)

    48 7.79%
Page 7 of 7 567
Results 73 to 80 of 80
  1. #73
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    Oct 2008
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    1913

    Re: How fast is your homemade CNC?

    Quote Originally Posted by Yastron View Post
    I'm getting:
    65ipm on Y (2 motors)
    94ipm on X
    ~90ipm on Z

    I am very new to owning a CNC router and want to improve my machine, could use some advice please.

    I want to go faster in the X and Y for cutting foam, can it be as simple as increasing my power supply voltage? I know there are many ways to increase the speed, but upgrading my power supply would be the simplest, biggest bang for my buck right now. However I've been told that since my motors are wired in parallel that doubling my power supply voltage would not help me gain any significant speed, can somebody explain this to me please? I cannot find anything in the forums/internet to confirm this.

    Router specs:

    4x 556oz Nema23 Stepper Motors, Bipolar parallel, 5.0A rated current, 0.6ohm, 3V, 2.5mH
    24V power supply, 12A
    4x M542 Leadshine Drivers, 20-50VDC, 4.2A output max (so i'm not fully utilizing the 5A motor? or the possible 48V input?)
    AKZ250 USB Controller
    1605 C7 ballscrews

    If I swapped my power supply from 24 to 48, would I be able to expect a 10%, 50%, or 90% increase in speed?

    Thanks in advance.

    Its a good idea to always have some safety margin in both voltage and current. Many drivers can handle their rated power for a short time, but continuously may damage them.
    Bob La Londe
    http://www.YumaBassMan.com

  2. #74
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    Oct 2008
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    1913

    Re: How fast is your homemade CNC?

    P.S. My Hurco KMB1 while not home made was home retrofit by me. At one time I tested that 1000lb saddle and table at upto 450 IPM. LOL. I have it set at 150 now as its more than fast enough for 99% of what I do with that machine. I cut at upto 150IPM with it if the cut will allow.
    Bob La Londe
    http://www.YumaBassMan.com

  3. #75

    Join Date
    May 2019
    Posts
    3

    Re: How fast is your homemade CNC?

    Quote Originally Posted by peteeng View Post
    Hi Yastron - going to 48V will be a big help in gaining speed. Peter
    Quote Originally Posted by Bob La Londe View Post
    Its a good idea to always have some safety margin in both voltage and current. Many drivers can handle their rated power for a short time, but continuously may damage them.
    Thank you for the replies Pete and Bob,

    I went ahead and purchased this 48V regulated SPS:

    https://www.amazon.ca/gp/product/B00...?ie=UTF8&psc=1
    MEAN WELL SE-600-48 AC to DC Power Supply, Single Output, 48V, 12.5 Amp, 600W, 1.5"

    and will try running it at ~42 or ~44V to give some safety margin from the 50VDC limit of my stepper drivers.

    I may also look at changing my 1605 ballscrews for 1610 ballscrews if I still want more speed after the power supply upgrade.
    I regularly do diamond-drag engraving on aluminum (at 20ipm), and am curious how much the coarser pitch would affect my engraved text quality. Any thoughts on this?

    I will post my speed increase results after I hook up my new power supply and do some testing.

  4. #76
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    Jan 2014
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    112

    Re: How fast is your homemade CNC?

    Quote Originally Posted by Bob La Londe View Post
    P.S. My Hurco KMB1 while not home made was home retrofit by me. At one time I tested that 1000lb saddle and table at upto 450 IPM. LOL. I have it set at 150 now as its more than fast enough for 99% of what I do with that machine. I cut at upto 150IPM with it if the cut will allow.
    My benchtop with AC servos hits 1000ipm with some crazy accelerations no problem. Since I do mostly 1 offs (really never more than 10), my Rapid override is always set to 5%. Seems kinda silly

  5. #77
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    Nov 2012
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    711

    Re: How fast is your homemade CNC?

    Quote Originally Posted by mcardoso View Post
    My benchtop with AC servos hits 1000ipm with some crazy accelerations no problem. Since I do mostly 1 offs (really never more than 10), my Rapid override is always set to 5%. Seems kinda silly
    Hey, it's better to have it and not need it than the other way around. :-)

  6. #78

    Join Date
    May 2019
    Posts
    3

    Re: How fast is your homemade CNC?

    Upgrading 24V -> 48V (running it at 42.7V) got me pretty much double the speed, from 94 -> 180 on X, and 63 -> 120 on Y, and 86 -> 150 on Z. Very exciting stuff. Now how do I get it to 1000 ??
    I doubled all the accelerations to X20/Y12/Z18, and I didn't yet push the limits of the tuning... I stalled the X at 200 ipm and just left it at 180, then estimated the Y and Z speeds from my results on X.

    Thanks Pete/Bob for the encouragement, very pleased with the speed.

  7. #79
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    Oct 2008
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    1913

    Re: How fast is your homemade CNC?

    Quote Originally Posted by mcardoso View Post
    My benchtop with AC servos hits 1000ipm with some crazy accelerations no problem. Since I do mostly 1 offs (really never more than 10), my Rapid override is always set to 5%. Seems kinda silly
    Does it have over a thousand pounds of dead mass riding on the Y axis? LOL
    Bob La Londe
    http://www.YumaBassMan.com

  8. #80
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    Join Date
    Jan 2014
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    112

    Re: How fast is your homemade CNC?

    Quote Originally Posted by Bob La Londe View Post
    Does it have over a thousand pounds of dead mass riding on the Y axis? LOL


    I wish It would be a heck of a lot more rigid than it is.

Page 7 of 7 567

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