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Upgraded 3018 Pro using MGN15H Linear Rails and a 500w Spindle

Discussion in 'CNC Mills/Routers' started by dJOS_500, Jul 17, 2022.

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  1. dJOS_500

    dJOS_500 Journeyman
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    I started work on my new electronics cabinet today. I got the 36v PSU and VFD mounted, along with some lever lock connectors for the 230V wiring.

    I had to change my layout to accommodate the VFD, but I’m happy with the results so far. I also decided to use direct mounting as the sheet steel is just thick enough to tap for M3 and M4 bolts.

    IMG_1578.jpeg IMG_1579.jpeg
     
    #241 dJOS_500, Oct 5, 2024
  2. MikeP

    MikeP New
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    Direct mounting onto the plate is a good practice, use steel spacers for the PCB mounts and drill a hole on the base plate for bolting the earthing strap.
     
    #242 MikeP, Oct 5, 2024
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  3. dJOS_500

    dJOS_500 Journeyman
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    I’ve got brass hex stand-offs that I’m going to use for the pcb’s - I think they should be adequate.

    The enclosure came with an earthing strap, and I’ll definitely follow your recommendation.
     
    #243 dJOS_500, Oct 5, 2024
  4. MikeP

    MikeP New
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    Brass or aluminium spacers is what I was meaning to say but they just slipped my mind and so instead of metal I wrote steel.

    I take it you will be solding all the motor and spindle connections using either GX12 or GX16 terminals for servos and GX20 for the spindle..

    Also add provision for addition mains sockets and maybe relay switched outlets.
     
    #244 MikeP, Oct 5, 2024
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  5. dJOS_500

    dJOS_500 Journeyman
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    Yep, I’ve bought a stack of GX16’s in various pin counts, and I will be soldering all the the wires.

    For all of the internal terminals, I’ll be using crimped ferrules. I also have a nice tube of liquid tape to pot all of the JST connectors.

    Extra mains sockets isn’t something I’m going to bother with. I use power monitoring via my Hubitat home automation system and I use that to turn on/off dust collection and external mains powered accessories via Zigbee sockets.
     
    #245 dJOS_500, Oct 5, 2024
  6. dJOS_500

    dJOS_500 Journeyman
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    I made some 3D printed drill guides today, but ran out of time to use them. Apparently building furniture for my daughter is higher priority. :rolleyes:

    IMG_1584.jpeg

    Edit: I somehow deleted my following post. So I’ve appended to this one for the sake of chronological order.

    I made some really good progress today. All the stand offs are installed, and I got a lot of wiring done.

    IMG_1600.jpeg

    It still fits in the case too!

    IMG_1603.jpeg
     
    #246 dJOS_500, Oct 6, 2024
    Last edited: Oct 12, 2024 at 5:47 PM
  7. MikeP

    MikeP New
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    It's all coming together. Nice job!
     
    #247 MikeP, Oct 12, 2024 at 11:52 AM
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  8. dJOS_500

    dJOS_500 Journeyman
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    Cheers, I’m hoping to finish it off today, but I might be being a bit optimistic.
     
    #248 dJOS_500, Oct 12, 2024 at 5:34 PM
  9. dJOS_500

    dJOS_500 Journeyman
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    My electrical cabinet now has an eStop / power switch. I’m waiting for some wiring glands to arrive before I add the power cable. I was going to install a fused IEC switch / socket combo, but I’ve decided to use the eStop instead.

    I might look at installing a 240v breaker instead of a fuse.

    IMG_1614.jpeg

    IMG_1615.jpeg

    EDIT: I made a bit more progress tonight, I made a template in CAD to work out the GX16 and USB connector locations, and the result came out well I think.

    IMG_1627.jpeg IMG_1628.jpeg IMG_1629.jpeg
     
    #249 dJOS_500, Oct 13, 2024 at 1:41 AM
    Last edited: Oct 13, 2024 at 6:43 AM
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  10. dJOS_500

    dJOS_500 Journeyman
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    My wiring glands, DC to DC step-down converter (to power the controller with 12v or 24v), and circuit breaker arrived today. I need to rearrange a few things tho to make better use of the space….

    I’m using short piece of DIN rail for the breaker and lever lock terminals.

    IMG_1647.jpeg IMG_1645.jpeg
     
    #250 dJOS_500, Oct 16, 2024 at 6:35 AM
  11. MikeP

    MikeP New
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    I see mostly all hobbist who have a VFD spindle, for obvious reasons the VFD controller ends up being fitted in the same enclosure where the psu, motor drivers, relays, cnc controllers etc also reside in close proximity.

    You know with some of us who have an electronics background, it might be worth putting some sort of wire gauze or wire mesh (Faraday cage) around the VFD controller grounded to earth, It will reduce any superfluous EMF affecting the signalling to the steppers.

    As we both have the same MKS controller, one issue I encountered with Stepperonline external drivers. I had to disconnect the ENA+ connection. In effect what this will do is the steppers are constantly powered ON and they make a white noise when they are in idle state. If I connect the ENA+ then I was getting inaccuracy of about -3.6mm. I connected with others who were using the same motor drivers as mine but with a more professional designed controller, they didn't have that issue. So the problem stems with something to do with the the MKS firmware handles the delay between the PUL signal, and the ENA signal needs to be disconnected after the PUL signal stops. I no longer have access to a signal analyser or an oscilloscope, so never manage to get to the bottom of it.

    I see you have different motor drives maybe you might not see the above issue.
     
    #251 MikeP, Oct 16, 2024 at 8:31 AM
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  12. dJOS_500

    dJOS_500 Journeyman
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    My steppers are TMC 2160’s, so hopefully they won’t have the same issues. One nice feature is they can be set to 50% power when holding position.

    I’m also running grblHAL firmware on my DLC32 which provides a lot more control that the stock firmware.
     
    #252 dJOS_500, Oct 16, 2024 at 4:47 PM
  13. dJOS_500

    dJOS_500 Journeyman
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    That's better, nothing like a bit of 3D Tetris to solve a problem! :D

    IMG_1653.jpeg
     
    #253 dJOS_500, Oct 16, 2024 at 6:50 PM
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