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The configuration window allows us to select and adjust our equipment; it's growing big and maybe a bit scary as we've added more and more configuration possibilities, but again: in most cases there is no need to change anything here.

Now let’s see one by one the elements it is composed of:

More options:

Micrometers by step = 1000* displacement per turn (in mm)/steps by turn.

… as an example , for a focuser that moves 20mm by turn, and our standard 3600 steps/turn motor, the calculation will be: Micrometers by step= 1000* 20/3600= 5.55.

Let's go now to the “Set limits”:

There are two ways to limit the focus motion, always with the aim of avoiding damaging the focuser, motor etc.

The first way: beginning from a position where we are near focus, give it a motion range. We can manage this entering direct values in the “Max pos” and “Min pos” fields just seen.

The procedure will be as follows:

This is the simplest way of working, and it is perfectly convenient for the majority of the cases.

Nevertheless, if:

we can indicate the program where, exactly, are the focuser limits

Since v3.5 software and 2.2 firmware, even physical limit switches can be used. Please pay a look at the last section, Advanced uses .

This is the second way.

After quitting the configuration window, we must move the motor (using the “OUT” or “Cont OUT” buttons already explained) until the focuser is almost completely out of its trajectory; once there, we go back to the configuration window and press the “Set outermost” button.

We go back to the main window pressing “OK” and let’s move the focuser, always with the buttons (“IN” or “Cont IN”), until it is almost at the maximum limit inside its trajectory.

In both cases, and in order not to the force the mechanism, a minimum safety margin, such as ½ millimeter will be enough.

Again to the configuration window and now we press “Set innermost” button.

And so it is. The system now knows the motion limits and will never get out of them. It is a simple process but, since the motor is rather slow, it can be boring to implement. By the way, the motion limits will not be enforced until both have been defined; once done, the “Max pos” and “Min pos” fields will be updated with the new values, and of course can be changed at anytime.

Back to our review by the configuration window, there are a few buttons left to describe:

The “Advanced parameters...” area, as it full name says, while powerful is also potentially dangerous. If you are sure you want to modify those, you'll have to press the “Enable modifications to these parameters”, then agree to a popup window, and you'll have full freedom.

All the modifiable fields have a “tooltip” (a short help message that will display as you pass your mouse pointer over it) that will help you find correct values, but let us insist again: do not change them unless you know for sure you must do it.

The most dangerous things you can do:

Basically, the type of motors:

Important: any motor you plug to the controller should not take more than 1A current. If you are changing motors, either you know what you're doing or please do ask us before damaging the controller.

Regarding the motor mode, this is really simple: before firmware 1.5 (quite long ago), the Seletek controller drived motors in a fixed way; for Robofocus(tm) or Moonlite(tm) motors, a specially wired cable was needed.

Now we have improved the firmware and software so no special cable is needed. The configuration goes like this:

Motor connected


Select Mode





Default mode

Robofocus(tm) or Moonlite(tm) or compatible



Will not work with the hand pad if no PC is attached - configuration is saved at the PC!

Robofocus(tm) or Moonlite(tm) or compatible

Specially wired


Suitable for people updating from previous versions


Specially wired


Odd combination

The “inverted” modes just step in the opposite direction – select inverted if your automated software is confused about what's IN and OUT.

For any other case please select the default “Lunatico” mode.

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