Cross slide encoder and limit switch brackets

Various electrical bits remain to be fitted under the cross slide.

• The encoder read head, magnetic strip and encoder cable fit one one side of the cavity (double red dots).
• On the other side is the +limit / home switch and -limit switch (single red dots).

Not very dramatic action here but it needs to be done, so let's get it out of the way.

Cross slide encoder:

Let's get the linear encoder fitted. Here's the Machine-DRO datasheet for the mini encoder. Not impressed that they can't even get the drawing right. My encoder head has mounting holes in the wrong place - "wrong" if you consider the datasheet to be "right". 

Even a blind fool can see that the datasheet doesn't reflect the reality of what they are supplying.

Luckily I noticed this before I created the CAD model, so the tapped holes in the saddle body are in the right places. But now I need to drill out the fixing holes so they are M3 clear rather than M3 tapped.

3.5mm drill, placed with the touch probe and DRO:

Countersunk and fitted with M3 CSK screws. Nice - has the required clearance for the magnetic strip. I'll leave that for now though, so I don't fuck it up. 

Limit switches:

Simple enough job. But I'm not used to these tiny girly screws. Those holes are tapped M2 x 0.4, requiring a 1.6mm drill and this tiny tap wrench.

Job done

Looking good. Even better - they fit perfectly.

That's the cross slide gubbins done for now.