Profile Window

Profile window

This window contains the results of the Vcurve runs that characterize your system.

These parameters are the heart of the FocusMax algorithm and are unique for each system configuration.

If you change a camera, focuser, add a device such as filter wheel or rotator, then a new PRofile should be created with a unique name so that the system parameters may be saved and loaded when you wish to focus the telescope.

1.Vcurve data is stored in the system ini file and can be viewed by opening the Profile window.

The system name

Average Left and Right slopes

Average Position Intercept Difference (PID)

Standard deviation

Total number of points are used to calculate the mean values.

2.Data grid:

Use column will allow you to select or unselect Vcurve data to be used for calculating the averages

Date and time of the Vcurve run

Position Intercept Difference (PID)

Left and Right Slopes

Calculated Left and Right Steps per HFD (1/slope)

Comments with camera binning, Total points used to generate the Vcurve and the number of good points used to estimate the slope of the line

File name of the Vcurve run. Vcurve files (ending in .vcl) can be loaded into the Vcurve window and reviewed or shared with other users

3.Graph:

Graphs of the Vcurve runs can be displayed based on Left or Right Slope, Left or Right Steps/HFD or PID

The Sigma Limits setting in the Profile Window will allow you to identify Vcurve data that is errant or suspect.

Note in the picture below that reading number 4 is at or slightly beyond the dashed Sigma Limit lines and can be considered a suspect data point. This can easily be excluded form the analysis by double clicking the 'Y' on data point #4 in the data grid which will toggle the 'Y' to 'N'' and automatically update the graph.

4.Delete Button:

To delete Vcurve data Click the far left row number which will highlight the row(s) to delete then press the Delete button.

5.Review the data and look for any significant difference in the R and L Slopes, PI Difference.

Entries that looks suspect can be excluded by clicking the ‘Y’ in the Use column.

If the Comments column show many points that were excluded then you may want to consider removing the row

You can permanently delete entries by clicking in the small box to the left of the Use column which will turn red then press the Delete Entries button.