Sunday, 11 September 2016

CNC upgrade progress - Fixing the cracked spindle holder

 Found a solution for the cracked spindle motor bracket. It is pretty simple, but very efficient. I simply cut off the cracked side, drilled and tapped two new holes and by using the two separate bracket halves, which are some sort of a car part I found in a hardware shop, my spindle holder is as good as new, perhaps even better. The brackets I found are for 70mm exhaust pipe, 5mm more than I need, but that wasn't a problem.
To improve it further, I added a 2mm aluminum strap between the steel bracket and the spindle motor. This gives a softer grip on the motor than just the steel brackets would give.

I am quite happy with this brand new spindle holder, in fact so happy that I decided to carry on, not wait for the newly ordered spindle bracket to arrive. 
I have installed it on the Z plate and I am very satisfied with the results, so perhaps I will keep this one, and once the one I ordered arrives I will keep that one as spare.

I believe that this solution does not need an additional safety bracket since it is made up of two individual brackets. I don't think the bottom of the spindle holder will ever crack, the top part is more sensitive.

Anyway, now I can carry on with my upgrade.

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