Results 1 to 5 of 5

Thread: Please help: spindle dropping when attaching Dust Shoe

  1. #1
    Join Date
    Mar 2012
    Location
    Poquoson, Virginia
    Posts
    8

    Question Please help: spindle dropping when attaching Dust Shoe

    On my PRSAlpha BT48 while the controller is on and when I attempt to slide the the dust shoe on the spindle carriage, it will drop from the additional weight (I am guessing), and thereby lose the Z-axis position within SB3. I then have to re-zero the Z axis. I would think with the springs and stepper energized it should not drop like that?

    Thoughts anyone?

    Thanks, Jimmy

  2. #2
    Join Date
    Jun 2007
    Location
    Hampton Roads, VA
    Posts
    1,127

    Default

    Check the set screws are tight in the drive gear.
    "Once a person moves away from the computer and CNC some of the most important work begins." ~Joe Crumley

  3. #3
    Join Date
    Mar 2004
    Location
    Lenox High School, Lenox MA
    Posts
    886

    Default

    Contact Shopbot directly for technical support. You may to upgrade the springs. I had a similar problem, SHopbot sent be new springs.

    Phil

  4. #4
    Join Date
    Mar 2012
    Location
    Poquoson, Virginia
    Posts
    8

    Default

    Thank you. Will do.

  5. #5
    Join Date
    Mar 2015
    Location
    Chicago, IL
    Posts
    68

    Default

    Quote Originally Posted by Jimmy Phillips View Post
    On my PRSAlpha BT48 while the controller is on and when I attempt to slide the the dust shoe on the spindle carriage, it will drop from the additional weight (I am guessing), and thereby lose the Z-axis position within SB3. I then have to re-zero the Z axis. I would think with the springs and stepper energized it should not drop like that?

    Thoughts anyone?

    Thanks, Jimmy
    This definitely shouldn't be happening. Turn on your system, make sure the Z motor is powered/energized and with your hand, see what kind of force is required to break that axis loose. Pay attention to the sound you hear. You'll know if you're fighting against the motor. At idle, the holding torque is going to be essentially the best it's going to be, and that should be really difficult to do by hand (e.g. you'd really need to yank down on it). Checking set screws is a good idea. Make sure the spindle is mounted tightly. While your at it, check your v-rollers are snugged up appropriately. You shouldn't be able to move the Z car (not spindle) front/back or left/right. Those Z springs are essentially just keeping the spindle from bottoming out on your table when the machine is off.
    Matt DeVincentis
    ReZurrection Control
    ShopBot Controller Upgrades
    mattdevincentis(at)gmail(dot)com

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •