silca laser machine

[gazzaull25]

Hi there all

I was after some advice on how to set up my laser machine, it is a old silca club laser machine.
The problem i'm having is when i get it all set up etc and try and cut a key the follower side keeps moving all the time so when come to finsih the key and its to deep but ok at the begining.
i cant seem to lock off the following side of the machine.
it also has a ford tibbe adaptor which i'm not having much luck with so any help would be welcomed.

Thanks

Gary