The TCF-S Temperature Compensating Focuser is a most useful tool for any telescope owner, as focus is the single most important element to having a high-quality view of any astronomical object. In addition to having high resolution and low backlash from a purely mechanical standpoint, the TCF improves its focusing power with the addition of a temperature probe. This probe can monitor the temperature of the telescope tube and adjust focus to eliminate thermal focal shifts down to a resolution of 0.1° Celsius. Note: there is a 2" and 3" version.
Once connected, you can move the focuser in relative and absolute positions.
There are no known bugs for this driver. If you found a bug, please report it at INDI's bug tracking system at SourceForge. (You can log in with a variety of existing accounts, including Google, Yahoo and OpenID.)
Note this focuser is an absolute position device, meaning that you can set a number of focus steps for offsets etc and it returns to the same position after each session.
Tested October 2020 with the older external controller model. It will/does work without the inbuilt temperature sensor - the main benefit of having the inbuilt temperature sensor is that the unit can be "trained" to automatically compensate for temperature changes without software intervention, however it assumes the same focus point for all filters and therefor is of limited value unless all filters are absolutely parfocal.