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Thread: Matt's Grizzly G0602 CNC Conversion

  1. #205
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    Default Re: Matt's Grizzly G0602 CNC Conversion

    I had two acorn boards show up in the last couple of days. Dragged the lathe out, dusted it off, cleaned it up and fired up Mach one last time. Everything checked out fine. Ran pretty quiet, now I am second guessing if I should build a second controller....Screw it I will just use this controller.
    Matt's Grizzly G0602 CNC Conversion-img_0374-jpg
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    Last edited by Turbo442; 01-12-2018 at 05:26 PM.


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    Default Re: Matt's Grizzly G0602 CNC Conversion

    Pulled the original CNC4PC boards from the controller. Left the power controls and 5056 stepper drivers. Moved the drivers over on the mounting plate to give a little more room for the Acorn board in the controller. Got the Acorn board mounted on standoffs. Mounted and wired the Centroid 24V PS. After about 4 hours of messing around I had Z and X axis moving around. I had to reverse the X motor direction. I did that by reversing both pairs of stepper motor wires at the driver. I am trying to keep the Centroid settings close to default if possible. Another couple of hours and I had Z and X calibrated under .001' and backlash set. I used .001" for both Z and X. Its amazingly close at the moment. Now on to the VFD wiring. Upgrading from an existing Mach setup is sooooooo much easier than doing this controller from scratch. Actually its pretty fun because it moves along so quickly. So much less troubleshooting. Also Centroid provides all kinds of schmatics to help with various configurations. Its helping me a lot to understand proper implementation of the various safety and interlock systems we often over look on home CNC builds. I built a dedicated WIN10 machine from a 5 year old game machine I had laying around. Plenty of performance. Did a fresh install of WIN10 and configured the OS per centroids recommendations. So far the solid seems much more polished than Mach although I am going to do my best to not talk negatively about Mach. I got us where we are today and made a huge impact on the CNC world. I really appreciate the clean and uncluttered look of the Centroid software interface so far. It really has a professional / commercial feel to it.



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    Default Re: Matt's Grizzly G0602 CNC Conversion



    Here is the new layout with the Acorn Board. I will clean up the wiring after I get a few more things completed like the VFD and spindle encoder. I plan to add a proper ESTOP circuit per Centtoid specs, home flags, limit switches, a 4th wire for the 240V circuit. Flood coolant relay. Led enclosure lighting.


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    Default Re: Matt's Grizzly G0602 CNC Conversion

    Making some progress. The steppers and spindle are moving around. I finally got the Acorn Board controlling the TECO VFD FWD, STOP, REV AND SPEED.






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    Default Re: Matt's Grizzly G0602 CNC Conversion

    Looking good.
    I have only been doing some preliminary prep research to get everything together for my Acorn on a CRP router. Things like wiring diagrams I will need. Post processor for Fusion 360 for the Centroid.
    Getting the computer setup, etc.
    Then I will be right behind you.

    Lee


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    Default Re: Matt's Grizzly G0602 CNC Conversion

    Hi Matt,

    I have been following along with this build as I am getting ready to CNC a G0602 and a G0762. At first I thought I was going to use Mach, as that is what I currently use on my CNC router. After reading through this thread, I'm seriously considering the Acorn/Centroid setup.

    I've been reading several threads and might have them confused, but did you add a braking resistor to the Teco?

    Tron



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    Default Re: Matt's Grizzly G0602 CNC Conversion

    Quote Originally Posted by TronCarter View Post
    Hi Matt,

    I have been following along with this build as I am getting ready to CNC a G0602 and a G0762. At first I thought I was going to use Mach, as that is what I currently use on my CNC router. After reading through this thread, I'm seriously considering the Acorn/Centroid setup.

    I've been reading several threads and might have them confused, but did you add a braking resistor to the Teco?

    Tron
    From what I remember, the TECO VFD will not connect to an external braking resistor directly. It needs an optional external braking module. That being said there is an internal resistor built into the TECO VFD you can use, it’s just pretty easy to overwhelm it at the higher RPM’s.


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    Default Re: Matt's Grizzly G0602 CNC Conversion

    I have been making some progress on the Acorn encoder setup. I have attached some photos.










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    Default Re: Matt's Grizzly G0602 CNC Conversion



    Using only one drive gear, I couldn’t get the encoder close enough to the original spindle gear drive with out it hitting the spindle pulleys. So I added an idler gear to get additional clearance around the pulley. The red anodizing is just some scrap aluminum I had laying around. This may not be the final version of the encoder mount. I have a few changes I will probably make although this should work as is.


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    Default Re: Matt's Grizzly G0602 CNC Conversion

    The gears are machined out of white UHMW on the mill using a 3/8 EM 3 FL, 1/8 EM 2 FL and 1/16 EM 2 FL. I used coolant, they came out pretty clean and fit the original spindle gear perfectly.


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    Default Re: Matt's Grizzly G0602 CNC Conversion

    The new Centroid wireless remote jpg handle showed up today. I upgraded to the latest software/firmware per the YouTube video. The jog handle works great so far and the quality of it exceeded my expectations!!! It’s so much nicer than the Vista CNC unit I was using with Mach. Nice thick rubber molding on the outside. The jog wheel feels great. Two big thumbs up!!!




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    Default Re: Matt's Grizzly G0602 CNC Conversion

    Quote Originally Posted by Turbo442 View Post
    From what I remember, the TECO VFD will not connect to an external braking resistor directly. It needs an optional external braking module. That being said there is an internal resistor built into the TECO VFD you can use, it’s just pretty easy to overwhelm it at the higher RPM’s.


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    Yes, I was talking about the external braking module. I was wondering if you purchased one and are using it.



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