Everything about micrometers!

To check to see if the micrometer can move from one end to the next, you move the micrometer by (Cal Step) + (Zero position).
Examples: If (Cal Step)+(Zero Position) = x

dosbox

>M,10,-x
 - This will move the micrometer towards the mirror
>M,10,x+1
>M,10,-1
 - Type the absolute value for the movements (x-1, ie x=2121 --> 2121 +1 = 2122)
 - This will move the micrometer back to the measuring position, the -1 will reset the zero location

To move the micrometer to the bulkhead position, find the highest step number in either the UV or a CJ file, let that number by y. starting from your zero position, run the following

dosbox

>M,10,y

Refer to Motor Positions for the motor numbers

The reason that line 302nm was originally picked was because that one of the closes peaks to the micrometer's reference point. However the issue with this is that 302nm has a duplex meaning very close to that peak, there would be a smaller peak which could cause issue if the instrument steps were off and found the wrong peak. Thus the line 296.7nm was picked. This line is a bit further away from the original 302nm, but it does not have any duplex which allows a larger margin of error of the micrometer stepping.

To find the new cal step, we will first open the latest CH scan.
From here, we'll look for wavelength 3000 and 2965, then note down the step. (In this case, 2856 and 2358) The reason 2965 taken is because that is the closes scan to 296.7 and this will be close enough for the instrument to finalize the newest scan (This is the same case for 302nm –>3000. From there we can find the differences between the two to find the new cal step required. In this case we will do 2856 - 2358 = 498.
With those differences, you can find the new cal step by adding 498 to the current cal step. This can now be adjusted in the ICF file.
Once we have the cal position, we need to adjust both the zero position and the micrometer offset.
Zero Position - Cal Step Differences = New Zero Position
Micrometer offset - Cal Step Differences = New Micrometer offset
These values should be entered into the ICF.

The hardest part of micrometers is to understand how all the steps are calculated and where the steps are coming from.
All the calculations for the ICF is from the left to right.
The movement via MM, positive is on the right, negative goes to the left.

Micrometer Optical LED Reference Trigger
Finding the Micrometer
micrometer_optical_led_reference_triggering.pdf - Includes the Schmitt Trigger schematics.