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Thread: Alpha 7.2 motors or PK299-F4.5A motors?

  1. #11
    Join Date
    Mar 2005
    Cabinets Plus of Augusta, Hephzibah Ga 30815


    I just completed the 7.21 upgrade on my alpha and i cut a door sample before and after the upgrade . The difference is incredible . Ill try to post photos , after the upgrade i cut 3/4 mdf 2 passes @7 ips the cut was as good as on a table saw . I used a 1/4 compression bit from centurion tooling and for the groove in the door pannel i used a 3/4 ball nose @4 ips .125 deep and it can go to paint without sanding. Its like a new machine. I would not give a second thought about the shopbot upgrade , go for it .

  2. #12
    Join Date
    Sep 2004
    , Denver PA


    Our satisfaction with the ALPHA upgrade was similar to Gene's.

    If you do the upgrade and don't like it, we'll buy the machine. Only, you need to deliver it.

  3. #13
    Join Date
    Jan 2004
    , South Jordan Utah


    Now that I've got a guaranteed buyer for the machine, I'm going to go for it ;>)

    The upgrade is too good of an offer to pass on, even if I only replace the two X-axis motors/drivers and the Y-axis motor/driver.

    Somewhere along the software upgrade path, I changed my circle resolution from 0.005 to the factory default 0.05. Setting that back to 0.005 and changing the steps per revolution from 500 back to 1,000 on my 3:1 belt-drive gave me nearly perfect cuts - again. I'm really doubting that changing to the 7.2:1 motors will make my machine perfect, but I won't know unless I try . . .

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