Re: [CAD_CAM_EDM_DRO] My CNC Project

hey rich!
congrats on getting your mill running! I am just now starting the process of
putting limit switches on. While I am using double ended motors I too found
the handwheels to cause some problems. Main they are no balanced and I found
by removing the handle and shaft and the small back nut (that you tighten
when you "zero" the handwheels) and the screw for it then they turn great! I
just put some locktite on the red handwheel markings so they turn with the
handwheel and don't chatter. So far so good also. I would love to see some
pics of your work if you get a chance. Again congrats!
tauseef

>From: "Rich D." <cmsteam@...>
>Reply-To: CAD_CAM_EDM_DRO@egroups.com
>To: CAD-CAM-EDM-DRO List <CAD_CAM_EDM_DRO@egroups.com>
>Subject: [CAD_CAM_EDM_DRO] My CNC Project
>Date: Fri, 05 Jan 2001 23:29:20 -0500
>
>Well, Bill and friends,
>I have my Sherline CNC'ed 5400 Mill running now on CNC Pro and Dan's 2A
>board.
>Mostly, I've been practicing g-code conversions from dxf files created in
>Corel and AutoCad LT 98 and cutting acrylic logos (Ham callsigns for my
>buddies)
>and pocketing. There are a lot of tricks to learn, but things are smoothing
>out
>very well.
>I mounted my steppers on the "wrong" end, saving the handwheels, only to
>find
>that the handwheels located on the far end of the leadscrew are a terrific
>resonating torsional and inertial load. They can be seen to vibrate in the
>opposite direction to the actual rotation at the motor end at certain
>stepper
>speeds. If they were located on a double ended shaft motor, the leadscrew
>would not be twisted this way altho the wheels are still not doing things
>any
>good. Like they say, handwheels are not needed anyway. Live and learn.
>With the handwheels removed, the operation is MUCH smoother.
>BTW, my motors (VEXTA 23's) have the bearings setup modified to provide
>thrust preload.
>Rich D.
>
>--
>-==Rich=-=Colorado Midland Railway=-=<http://www.geocities.com/cmsteam/>
>
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