Millright Mega V z-plate for spindle mount
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PrintNC inspired z-plate for the Mega V to attach a spindle mount
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- Printables
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- Tools
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This is a Z plate for the Millright Mega V for a 65 mm spindle mount, based on the printNC v4 z-plate design.
The printNC design is easy to machine (just a flat plate with the correct hole pattern), with a clever and simple Y axis/pitch tramming feature, which uses two 3d-printed tram blocks to help with adjustment, and a bolt acting as a centered pivot on the spindle mount.
Unlike the original zplate, the mount is secured from the front, which means that it can be trammed on the X axis by shimming without fully disassembling the Z axis.
I cut this from a ½ inch cast aluminum plate, and didn't need to face it, but I did need an additional 2-3mm spacer plate between the z-plate and the spindle mount to allow the spindle to clear the Z motor. If I made another one, I might start with 5/8th plate instead and skip the spacer.
The 4 holes for the tram blocks are drilled and tapped for m5 bolts.
The holes in the plate for the spindle mount (4 at the corners and one to allow it to rotate) are drilled and tapped for m6 bolts.
The remaining 16 holes to attach the plate to the linear rail blocks were drilled to 3.5mm.
On the spindle mount itself, I drilled and reamed the center hole to 10mm, and then the four mount holes to an oversized 6.5-7mm.
The tram blocks in the image are slightly oversized to help to hide a bolt hole that wandered a little bit when drilling.
Alternative Z endstop mounts here: https://www.printables.com/model/32901-millright-mega-v-z-homing-switch-mount