Hafco (RF-47) CNC mill and lathe conversions - finished

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Thread: Hafco (RF-47) CNC mill and lathe conversions - finished

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    Default Hafco (RF-47) CNC mill and lathe conversions - finished

    I wanted to share the recently completed CNC conversion of a Hafco HM-47 mill and AL-336D lathe, with the hope to inspire others to do the same and provide some encouragement for those working late into the night on their own projects.

    The basic specs of the pre-converted machines can be found at these links:
    Mill: https://www.machineryhouse.com.au/M125D
    Lathe: https://www.machineryhouse.com.au/Centre-Lathes

    A summary of the major components in the build as follows:
    Mill:
    - DMM-Tech servo, Dyn2, 750W servo motors on X, Y, Z axes
    - Noulei C5 grade rolled double nut ballscrews on all axes
    - Marathon Electric 2.5HP spindle motor
    - Teco L510 VFD
    - Mesa 7i76e controller
    - LinuxCNC
    - Z-axis brake (activated when power is shutdown)
    - Festo air management
    - One shot oiler
    - Custom user panel

    Lathe:

    - DMM-Tech servo, Dyn2 servo motors, 400W on X axis, 750W on Z axis
    - Noulei C5 grade rolled double nut ballscrews on all axes
    - Marathon Electric 2.0HP spindle motor
    - Teco L510 VFD
    - Mesa 7i76e controller
    - LinuxCNC
    - Festo air management
    - Spindle speed encoder
    - Custom user panel

    The accuracy achieved on the mill is less than +/- 20 um for X and Y axes and +/- 25 for Z.
    The lathe achieves around +/- 20 um on both axes.




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    Default Re: Hafco (RF-47) CNC mill and lathe conversions - finished

    Excellent Work!

    Is Linux CNC not compatible with the DMM break out board? I just had a 3 axis package quoted through them and would prefer to be running on linux when done.



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    Default Re: Hafco (RF-47) CNC mill and lathe conversions - finished

    I believe the DMM board is compatible with LinuxCNC, but best to confirm with them. I found them to provide excellent customer service. I wanted an Ethernet connection and some of the other functionality that the Mesa 7i76e controllers provided.



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    Default Re: Hafco (RF-47) CNC mill and lathe conversions - finished

    Looks great. Did you convert them to make a particular product?



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    Default Re: Hafco (RF-47) CNC mill and lathe conversions - finished

    Thanks! Yes, I'm building custom electric bikes. Majority of turned parts are either 4140 CrMo or 1020 mild steel. Majority of milled parts are 6061 but some 4140 too.



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    Default

    Quote Originally Posted by IIOIOII View Post
    Thanks! Yes, I'm building custom electric bikes. Majority of turned parts are either 4140 CrMo or 1020 mild steel. Majority of milled parts are 6061 but some 4140 too.
    Bicycles or motercycles?



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    Default Re: Hafco (RF-47) CNC mill and lathe conversions - finished

    Bicycles, pedal with electric assist



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    Default Re: Hafco (RF-47) CNC mill and lathe conversions - finished

    Quote Originally Posted by IIOIOII View Post
    Bicycles, pedal with electric assist
    Pics?
    I have a Tangent Ascent on a Giant Team
    And a BBSHD on a Specialized with a Lefty.
    Are you incorporating a torque sensing bottom bracket?


    Sent from my iPhone using Tapatalk Pro

    A lazy man does it twice.


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    Default Re: Hafco (RF-47) CNC mill and lathe conversions - finished

    The ebikes we're building are entirely custom; frame, fork, saddle, etc. We have trailed a BBSHD and liked it, however have decided to use a Crystalite 2000W rear hub due to styling and packaging reasons. We're not yet ready to release pictures of the bike in full, however one attached of the various turned parts made on these machines. Also, you can follow the build if you search for Brian Tanti's Workshop on Facebook.

    Attached Thumbnails Attached Thumbnails Hafco (RF-47) CNC mill and lathe conversions - finished-img_0345-jpg  


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    Default Re: Hafco (RF-47) CNC mill and lathe conversions - finished

    Re. the bottom bracket, yes, using a torque sensing BB. Likely TDCM which has worked well in our development testing.



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    Default Re: Hafco (RF-47) CNC mill and lathe conversions - finished

    Quote Originally Posted by IIOIOII View Post
    Re. the bottom bracket, yes, using a torque sensing BB. Likely TDCM which has worked well in our development testing.
    I would love to use one on my Tangent. I just cant find a Torque sensing BB in my width. It is on a Team Downhill. I have thought of buying somebody else’s and fitting it to a new spindle!


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    Default Re: Hafco (RF-47) CNC mill and lathe conversions - finished

    Thinking about your BB width problem, it wouldn't be too hard to turn up a new axle for the crank. I've taken apart the TDCM and the setup is fairly simple. Changing the length of the crank axle will of course change the torque sensed, but if you're using Cycle Analyst, you can compensate for this.



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Hafco (RF-47) CNC mill and lathe conversions - finished

Hafco (RF-47) CNC mill and lathe conversions - finished