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Author Topic: Problem with pocket holes and z axis  (Read 3682 times)

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Offline ajl53

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Re: Problem with pocket holes and z axis
« Reply #10 on: January 12, 2013, 09:20:40 AM »
Thanks, I'll give those things a try and post the results

Offline Hood

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Re: Problem with pocket holes and z axis
« Reply #11 on: January 12, 2013, 09:24:30 AM »
Is there any possibility the cutter is being pushed into the collet?
Hood

Offline ajl53

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Re: Problem with pocket holes and z axis
« Reply #12 on: January 13, 2013, 03:26:11 PM »
OK, After taking a closer look at everything, here is what I did. I took apart the ball screw assembly for the z-axis and redid the upper bearing(felt like it was binding). Ground a flat on the ball screw shaft and
put another set screw in the coupling. I have a Lovejoy coupling now, but I'm going to install a more robust coupling just to be sure I'm not getting any slippage.
I also ran a test with a higher quality router bit and that also helped. Maybe I'm loosing some steps with too much force on a lower quality bit.
Before doing all the mechanical changes I took your advise and changed the Mach settings, and that did help but I think most of the issues are mechanical.
I also come to find out the table is not parallel with the gantry so I'm loosing about .03" as it traverses the y-axis.
The whole purpose for this part is new uprights for the gantry and new ballscrews on the x-axis. It looks like now I can make these parts before disassembling the whole machine to rework it....
Thanks to everyone for your help..
Art