Z-Axis loses zero

article on checking those here: http://docs.carbide3d.com/article/169-shapeoko-3-how-to-check-the-pulley-set-screws

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Thanks for the tip, I tried tightening the screws seems like they are already tight.

I had a similar issue with loosing Zs. I did find a set screw came out on the Z motor and I just got it assembled it a week ago and only run the hello world project. I found the set screw on the table by accident. Make sure you tighten both down, I added a little blue lock tight on to mine. I think when it was assembled that step was missed.

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So i ran another project on an elevated MDF wasteboard. Outcome was a lot better. Machine did not lose Z-position throughout the cut. It seems like issue is only when it goes over a certain Z-travel. Maybe an issue when using Makita as it is a bit shorter than DeWalt.

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I hope it is not a issue with the Makita being too short. I just got my XXL put together and was hoping to do the threaded inserts the same way.

You can extend the reach of the router by using a long reach endmill — my favourite is: http://www.garrtool.com/tooldetaillogin.jsp?edp=41030 as noted at: http://www.shapeoko.com/wiki/index.php/Endmills#Specific_Bit_and_Brand_Recommendations

Also, the router body is a cylinder and one can position it higher or lower and there’s no button to interfere as on the Dewalt. Worst case scenario is to stack two wasteboards, drill from one side, then flip and repeat.

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I ended up using the garr long reach bit. My Makita was already down as far as it could go in the spindle holder.

I did have a couple issues. I purchased the non flanged version of the threaded inserts so I wouldn’t need a second hole to countersink.

For some reason using Winston’s recommended .16 hole radius was way too small. The holes mushroomed really high at that diameter when they were inserted. I had to push it to .179 to get acceptable results. They still mushroomed a tiny bit there too, but I think I can tram it off.

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I have this issue when doing a plunge over a tab on aluminum or garolite. Being they are harder materials I figure it’s just the innate rigidity from the Z axis that is the cause. I’ve found reducing the DOC fixes the issue. Endmill lifespan is reduced, but that is minor compared to the entry cost of the machine.

Also making sure everything is super tight helped me too

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