Centring the microscope after building

From the Forum there are a couple of threads where users have found that the objective protrudes above the stage when the microscope is first assembled.

https://openflexure.discourse.group/t/first-time-user-staging-problems/2177
https://openflexure.discourse.group/t/my-lens-is-too-high/2137
(photos in both threads)

There are also threads about the centring the x-y position - the first of the two above is an example.

There are two issues related to those reports. This issue is about the instructions for initial set-up after building, a second potential issue is in the hardware (#403).

The instructions should include a step to centre the actuators. This should probably be at the end of the page for assembling the actuators - when the builder has just been using the nut slot to insert the nut and so will understand what aligning that hole means. There should probably also be a re-check at the end of the build, before using the software.

• Add a step to set actuators to the centre at the end of the actuator assembly !488 (merged)
• Add a step to check actuator centre in the final page, before using the software edit: motor assembly (after this point the actuators are fixed until the software is used.) !488 (merged)
• Consider adding a step about the need for a good slide for stage calibration, and the need for focusing before stage calibration, on the final page. !488 (merged)
• Illumination at the correct height. !488 (merged)
• Change final page to link to a basic "quick start guide" for alignment etc. This should be basic but exist before we release v7