1. Date of download: 10/8/2017
Copyright © ASME. All rights reserved.
Magnetic Resonance Imaging Compatible Pneumatic Stepper Motor With Geneva Drive1
J. Med. Devices. 2016;10(2): doi: /
Figure Legend:
To the right of the housing: a continuous pneumatic motor with planetary gearbox. Inside the housing: a cam, LEGO pneumatic switches, LEGO pneumatic cylinders, and a Geneva drive. To the left of the housing: a second planetary gearbox.

2. Date of download: 10/8/2017
Copyright © ASME. All rights reserved.
Magnetic Resonance Imaging Compatible Pneumatic Stepper Motor With Geneva Drive1
J. Med. Devices. 2016;10(2): doi: /
Figure Legend:
(a) The cam is pushing the switch closed. The Geneva driving gear's pin is exiting the driven gear. (b) The cam has pushed the switch closed, stopping air flow to the motor. The Geneva gears have stopped.

3. Date of download: 10/8/2017
Copyright © ASME. All rights reserved.
Magnetic Resonance Imaging Compatible Pneumatic Stepper Motor With Geneva Drive1
J. Med. Devices. 2016;10(2): doi: /
Figure Legend:
The interior view of the control electronics is shown. To the left are two three-way valves to operate the cylinders. The DAQ card is at the top right. The circuit board that drives the valves is at the bottom right.

4. Date of download: 10/8/2017
Copyright © ASME. All rights reserved.
Magnetic Resonance Imaging Compatible Pneumatic Stepper Motor With Geneva Drive1
J. Med. Devices. 2016;10(2): doi: /
Figure Legend:
The relationship between target angle and accuracy is shown. Each line represents a different rotational speed. The motor by Chen et al. is shown for comparison.

5. Date of download: 10/8/2017
Copyright © ASME. All rights reserved.
Magnetic Resonance Imaging Compatible Pneumatic Stepper Motor With Geneva Drive1
J. Med. Devices. 2016;10(2): doi: /
Figure Legend:
The relationship between load and rotational speed for 60 psi and 50 psi is shown. The shaded area denotes the optimal operating load and speed.