Here's an update to the no spindle rotation problem. Yes I've seen the Little Machine Shop's upgrade and now realised that this is an alternate board used by Seig to enable the speed to be altered by the BOB output. I have been in contact with Arturo at CNC4PC and he suggested that I check the wiring of the actuation circuit as everything else checked out OK. This consists of the mains feed passing through a small transformer on the AP2 board and is switched by the relay on the BOB. On investigation I found that I was not getting any mains voltage at the input to the relay in any position. Mains was found at one of the pins going to the transformer. Checking the primary of the transformer for continuity through the transformer I found that it fails( No Continuity) Followed the tracks to the transformer and when tested these were OK to the pins. The secondary circuit tested OK. That's my problem - burnt out primary winding on the transformer. The relay was unable to make a circuit and hence activate the board. So I have to get a new AP2 board from Arceuro when things free up again.I've been round the houses with this problem but at least the machine has go a complete facelift as regards electronic boards. The machine was bought new by myself maybe 10yrs ago now and it has served me well doing the bits and pieces that I come accross. Hopefully for many more years when I get this board replaced. Thanks for the pointers everyone.

Ken