Building My First CNC Router, Looking for Advice & Other Info

[Desertboy]

So i adjusted some of the components of the Z Axis to hopefully improve how rigid it is, previously that blocks that connect the Spindle Mount to the Linear Carriages were shorter than the Spindle Mount, in order to try and maximise Axis Travel, however in reality this meant that the spindle could reach well below the bed even without a tool in the collet, so i decided to make the Connection Blocks longer and increase the spacing of the Carriages.




I started looking today about how i need to properly Ground the Spindle at the VFD side, whilst looking for information i came accross a forum post on CNCZone that said many of the Chinese spindles do not have their Ground pins connected to anything inside the Spindle, so i decided to take the top off and have a look - and not much of a surprise as the Ground pin was not connected to anything. Where can i connect this to? Should i just drill and tap a hole so that a connector can be screwed to the casing and soldered the correct pin?



I've also been scouring the net today trying to find some nice proximity sensors to be used as limit switches, i think the DDSCV1.1 can use 12v limit switches? Could be wrong any advice would be appreciated.

Also waiting for the Cable Drags and breakout boards to arrive so i can design some brackets and a portable enclosure for the controller.

Also been searching for the correct resin to fill the extrusions with, anyone have any personal experience / recommendations?

Thanks

Alex

Nice one both you and Clive tested my spindle today with an ammeter and it's obviously pin 4 is not connected to anything ;)

Will do as Clive suggested, were the top bolts hard to undo? I tried and felt some resistance like I have some loctite to break didn't want to push it until I asked had a nightmare rounding off A2's next time I build I will only use A2's were needed and stick to proper bolts if appropriate.