NordicCNC's build log

[NordicCnc]

Can I just ask what the benefit is of using blocks of profile to sit the gantry profile on, as indicated in the picture?



It seems because of this you were forced to place the bottom linear rail on the front, thereby pushing the spindle further away from the gantry. I'd always though that the idea is to try and keep the centre of gravity of the spindle as close as possible to the bearing blocks the gantry rides on.

This is not in anyway meant to be a criticism, but just me trying to understand if this design means there are benefits to it that outweigh the spindle being pushed further outward.

Cheers

Those block are used to increase the gantry clearance. I want to build machine out of aluminium profiles and the 200x80 profile for the Y-axis sides are not high enough. Also by placing the linear rail on the front of the X-axis will allow me to use the work area fully, without increasing the footprint. If I were to put the linear rail on the bottom of the gantry profile I would lose approximately 160mm in the X-axis travel.

You are right about the overhang, but I would claim that it is not that critical. As long as the Z-axis and gantry is stiff enough, it should not be any problem at all. If you check other builds, the overhang is similar!

Thanks for your comment.

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