Hello , for calculating the max steps the PDF lists an example "My example focuser has four (4) full turns of the focuser knob from the minimum full IN position to the
maximum full OUT position. " i have measured my WO z81 and it is 4 turns and about a 1/4 of turn can i go with 4 or should i include the 1/4 of turn into my calculations ? that quarter of a turn measures out to b about 7.5 mm , maybe calculate it as 4.25 turns ?
Thanks
Tim
Last edit: Tim Steinman 2021-11-19
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Hi Tim
The 4 or 4.5 turns from all in to all out just determines the max steps value.
If the motor moved 600 steps per each full turn of the focusr knob it would be a max steps value of
600 * 4.5 = 2700 max step value
The more important thing is
1. work out the crtitical focus zone
2. work out different ways that the motor will connect, using geared motors/gears/belt etc
3. to get the required step size that gives around 10 steps in the cfz
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hello , for calculating the max steps the PDF lists an example "My example focuser has four (4) full turns of the focuser knob from the minimum full IN position to the
maximum full OUT position. " i have measured my WO z81 and it is 4 turns and about a 1/4 of turn can i go with 4 or should i include the 1/4 of turn into my calculations ? that quarter of a turn measures out to b about 7.5 mm , maybe calculate it as 4.25 turns ?
Thanks
Tim
Last edit: Tim Steinman 2021-11-19
Hi Tim
The 4 or 4.5 turns from all in to all out just determines the max steps value.
If the motor moved 600 steps per each full turn of the focusr knob it would be a max steps value of
600 * 4.5 = 2700 max step value
The more important thing is
1. work out the crtitical focus zone
2. work out different ways that the motor will connect, using geared motors/gears/belt etc
3. to get the required step size that gives around 10 steps in the cfz