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Type: Posts; User: gmoschini

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  1. Re: PM 1030V lathe convert to CNC help with hardware

    It can take them a day or a few to respond to emails.

    I don't know why they can't ship to your state...


    As far as I know ProCut is the only one to make a CNC hardware kit for the 1030V.
    ...
  2. Re: PM 1030V lathe convert to CNC help with hardware

    ProCutCNC makes a hardware kit:

    https://procutcnc.com/products/pm-1030v-cnc-lathe-conversion-kit


    I have it installed on my PM 1030V, and the fit is OK.

    They don't have an assembly diagram,...
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    Re: PM-932m CNC Conversion

    I'm still a long way off from purchasing a BT30 spindle cartridge, unfortunately.

    I have the mill and I have my DMM servos, but I haven't had the opportunity to get them under power yet.

    Next...
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    Re: PM-932m CNC Conversion

    Thanks for that info.

    Do you have a link for the Misumi / Mitsumi calculation software?

    Sent from my Pixel 3 XL using Tapatalk
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    Re: PM-932m CNC Conversion

    Possibly.

    There is a video of a guy on YouTube that made his CNC mill out of epoxy granite castings, and even has the BT30 belt-driven spindle.

    Here it is:

    https://youtu.be/rbqY8Mcbh0Q

    ...
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    Re: PM-932m CNC Conversion

    Something like that would be cool, I admit...

    But I think I would have trouble getting it through the doorway into the space in my basement, even if I was able to disassemble it.

    Sent from my...
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    Re: PM-932m CNC Conversion

    Re-working the design to use RG 25mm rails, and also 25mm ballscrews.

    25mm ballscrews require a larger MBA20-F motor mount, and a special FKA20 bearing mount on the front, standard BF20 floating...
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    Re: PM-932m CNC Conversion

    This enclosure box is bigger than I was expecting!

    It has two pre-drilled holes on the cover panel.https://uploads.tapatalk-cdn.com/20191115/6837d1d9957dfad065da23e60f4573af.jpg

    Sent from my...
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    Re: PM-932m CNC Conversion

    The steel panel for the electronics box arrived.

    It's thicker and heavier than I expected.

    18" x 18"https://uploads.tapatalk-cdn.com/20191114/13fae11314318b92833881e13e37a8d4.jpg

    Sent from...
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    Re: PM-932m CNC Conversion

    Hiwin RG Series rails on the X and Y axis.


    The Rails on the X axis (the table) have datum bar spacers that are offset - the fronts (right side) are 20mm, while the rears (left side) are 15mm.
    ...
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    Re: PM-932m CNC Conversion

    Hiwin HG vs RG Series

    I was able to get a price from MotionConstrained.com for a full set of Hiwin RG-series rails in the 20mm size for about $1100, a little bit more than the cost for the HG...
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    Re: PM-932m CNC Conversion

    I've figured out the size I will use for linear rails - 25mm Hiwin HG series, as they're easily available.

    A quick price check of Hiwin HG series, 2 sets of 25mm rails with 2 blocks per rail, from...
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    Re: PM-932m CNC Conversion

    Kind of looking at this J1900-based SFF PC, Qotom Q190S.

    Benefits:


    Fanless
    VESA Mount
    2 x LAN Ports - 1 for Internet, 1 for Mesa
    3 x USB 2.0 Ports
    1 x USB 3.0 Port
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    Re: PM-932m CNC Conversion

    I also have one of these Supermicro X10SDV-TLN4F Mini-ITX boards that I modified with a copper finned heatsink...

    But this board is massive overkill...


    The other C2750 board may be fine, but...
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    Re: PM-932m CNC Conversion

    I will probably have the PC initially set up on its own cart, with the connection to the CNC control box being via the ethernet cable.


    I have an older Asrock C2750D4I Mini-ITX motherboard that...
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    Re: PM-932m CNC Conversion

    After some further discussion with JT @ Mesa US I've decided to go with the Mesa 7i76E as originally recommended (good call!).
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    Re: PM-932m CNC Conversion

    DMM has some really fast shipping, the servo motors arrived today!

    431032

    431034

    431036

    431038
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    Re: PM-932m CNC Conversion

    Looking into this further, Mesa actually offers two other Ethernet boards that would work:


    7I95 Ethernet interfaced Step & Dir & encoder plus I/O Interface
    7I97 Ethernet interfaced Analog...
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    Re: PM-932m CNC Conversion

    Came up with a Y-axis motor mount that should allow me to re-use the existing hole for the ballscrew, with only drilling and tapping mounting holes required.

    The motor end has the DMM NEMA34...
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    Re: PM-932m CNC Conversion

    I found a like-new Hoffman CSD202012 (20x20x12") NEMA 4 enclosure on eBay for about $100, plus the panel board (sold separately) for another $40, so I'm going with that size.

    Hoffman also has...
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    Re: PM-932m CNC Conversion

    Thanks for the feedback.

    I looked at the Ethernet stepper board, but kind of decided against it because it didn't appear to have the encoder feedback with steppers (?).

    I thought it was...
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    Re: PM-932m CNC Conversion

    Test fitting a NEMA 4 enclosure sized 20" x 20" x 10", with 3 x DMM DYN4 AC Servo Drivers inside the box.

    I probably won't put the NEMA enclosure on the mill itself, but it gives you an idea of...
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    Re: PM-932m CNC Conversion

    AC Servos

    Decided to splurge and go for DMM AC Servos and DYN4 drives:


    86M-DHT 0.75 kW AC Servo on X
    86M-DHT 0.75 kW AC Servo on Y
    86M-DHT 0.75 kW AC Servo with Brake on Z
    3 x DYN4 AC...
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    Re: PM-932m CNC Conversion

    X-Axis Ballscrew

    Came up with a simpler mount for the X-axis ballscrew and motor mount, allowing for a full length ball screw and more travel.

    The parts are designed based on off-the-shelf...
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    Re: PM-932m CNC Conversion

    I'm looking at the TBI Motion store for Ball Screws:

    https://www.aliexpress.com/store/1797664


    They have some double-nut C3 or C5 grade ballscrews in 2005 series that are interesting:
    ...
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    Re: PM-932m CNC Conversion

    Hiwin RG Series Rails

    I am also getting quotes for the Hiwin RG Series rails, which use angled rollers instead of ball bearings.

    RGH20CA2R520ZAHII: $671

    2 x RGH20 rails, Heavy Load, Standard...
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    Re: PM-932m CNC Conversion

    Hybrid Closed-Loop Steppers

    Prices from Leadshine USA (leadshine.com):

    2 x $148: Leadshine CS-M234120 (without Brake) for the X/Y axis.
    1 x $208: Leadshine CS-M234120B (with Brake) for the...
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    Re: PM-932m CNC Conversion

    Linear Rails

    I think I'll go with Hiwin genuine HG series rails, from motionconstrained.com:

    Z Axis: 2 x HGH20CAZAC rails with normal blocks, 20mm rails 760mm long. $288
    X Axis: 2 x HGH20CAZAC...
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    Re: PM-932m CNC Conversion

    Playing with the idea of mounting Hiwin QR-series heavy-duty rails on the axises (axii?).

    The QR Series uses rollers instead of ball bearings, so they're for super heavy duty motion.

    These are...
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    Re: PM-932m CNC Conversion

    Ball Screw Kit:
    linearmotionbearings2008 on eBay has this kit:
    X Y & Z ball screws kit 772mm/397mm/602mm for ENCO RF45 CLONE CNC conversion


    If the pictures look familiar, they're from KCJ:...
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