Primary coil support combs finished!

Tonight I finished off the 8 primary coil support combs. Each required 3 mounting holes drilling and then threading to take M4 bolts. The position of the holes were transposed from the mount holes already in the anti-strike disc. This was done by carefully positioning all the support combs underneath the anti-strike disc and simply sticking a pencil through the holes to mark the drill points onto the combs. The holes were drilled to 3.2mm diameter and to a depth of 9mm then each hole tapped to take M4 bolts.

Here's all the combs after removing protective tape. You can see that the sets of holes are staggered to accept the spiral of the primary coil.

I engraved a reference number on the end of each comb to help during assembly.

The bolts to secure the combs are 10mm M4 nylon. I don't want to use anything conductive on the anti-strike disc except the strike rail of course.

I still need to open up the mounting holes in the anti-strike disc to 4mm, but I threw the assembly back together for a quick pic of the combs in place.

This is what Santa brought me this Christmas, it has a basic function generator built in so will be very useful when tuning the coil.