Timing Devices
There are four Assemblies which can loosely be described as timing devices. In addition there are other timing cams fitted directly to the rear of the machine
| Index Unit |
| Cam Box |
| Stop & Cancel Unit |
| Other Timing Cams |
The four main units are driven by spur gears. The full set are shown above. These gears were cut by Giles Parkes in his home workshop.