| Parameter | Value | Comments |
|---|---|---|
| Maximum stacking depth | 55 mm | Approximately. The precise number will depend on your placement of the two micro-switches. |
| Maximum speed[1] | 2.5 mm/s | The maximum speed is limited by Arduino clock speed, not by motor torque |
| Time to rewind from one end to the other[1] | 25s | Moving at the maximum speed |
| Breaking distance[1] | 1 mm | When travelling at the maximum speed |
| Time to speed up or break | 0.8s | Time to get to the maximum speed and break when moving at the maximum speed and acceleration |
| Smallest step | 1.25 μm | One microstep |
| Backlash | 200 μm | Loss of accuracy when switching the direction of the motion; not cumulative. Starting from software version 0.10 the backlash is fully compensated |
| Minimum distance between frames[1] | 1.25 μm | Corresponds to one microstep of the stepper motor |
| Maximum distance between frames[1] | 2500 μm | Can be set to higher in software if needed |
| Minimum framerate[1] | 0.01 fps | Can be set to much lower in software if desired |
| Maximum framerate[1] | 4 fps | Can be set to much higher in software if your camera and flash can handle it |
| Minimum number of shots[1] | 2 | In 1-point stacking |
| Maximum number of shots[1] | 9999 | In both 1 and 2 point stacking |
| Maximum number of stacks[1] | 999 | In timelapse mode |
| Maximum interval between stacks[1] | 9999 s | In timelapse mode |
| Maximum total timelapse length | 50 days | This is the limit of the Arduino's millisecond accuracy timer, millis() |
| Number of memory registers | 5 | Each register can store the whole current state of the rail |
| Minimum input voltage | 9V | Depends on the mass of your camera/lens; at lower voltage the stepper motor will start skipping steps |
| Maximum input voltage | 12V | As recommended by Arduino. Higher voltage will also overheat the stepper motor driver. |
| Maximum load | >1.0 kg | Maximum weight which can be moved by the rail without skipping the steps, at any angle (including moving the camera up vertically). I haven't tested >1 kg cases. |
| Weight, total | 1.36 kg | Including Velbon Mag Slider rail with the sideways motion module and 8 AA Eneloop batteries |
| Weight, motor unit | 894 g | Including Velbon Mag Slider with the sideways motion module; just the motor unit weighs 424 g |
| Weight, controller unit | 176 g | |
| Weight, battery unit | 286 g | Including 8 AA Eneloop batteries (batteries weigh 210 g) |
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