PCB Isolation Routing

[John S]

OK this looks like the surface of your bed isn't flat to the same plane as the gantry which is quite usual with these cheaper routers, even my Teckno Isel router varies over the bed.

Trick is to get a sacrificial plate and get the router to mill this flat, don't move it and attach to that.
You can buy some gel mats that are sticky on both sides to hold flat panels securely without bowing, not cheap but they do a good job.

[CHudson]

I think I will have to route pocket, I have a vacuum table to hold the PCB's but its on the MDF top. Any tips on removing KRESS collets? I use pliers but the weight and power I have to put in removing the collet after undoing the net I feel would affect the accuracy of the machine every time.

[John S]

I know, they are a pain in the backside, in fact they no longer sell just the collets, you have to buy then with a nut now.
I support the nut on an old socket and tap the collet thru with an alloy drift.