Thingiverse
ZTE Speed Holder for FTC by ChatterComa
by Thingiverse
Last crawled date: 4 years, 5 months ago
This is a 3D printable holder for the cheap ZTE speed Android phone, designed for use on FTC robots. With the new control system in FTC, they give us these phones, but no good way of attaching them to the robot or securing the USB cord. I designed this part to solve this problem for my former FTC team, 4278 De.Evolution. Unlike the holder in the kit-of-parts, it fits around the whole phone and locks it in place securely.
It has a USB cable strain relief (sized for the white Modern Robotics OTG cable, but should fit most other cords), and holes spaced for a TETRIX beam on the side plates. It also has cutouts for the volume and power buttons, the speaker, the microphone, the camera, and the headphone jack.
This holder has several different mounting options. You can mount it to a tetrix beam using the provided holes, or you can mount it to something else by drilling your own holes wherever you want in the side plates. You can also zip tie it on, or you can use ABS cement to securely weld it to another 3D printed part (see my other phone holders).
The phone is secured by a clip at the bottom, and you need to be able to bend this clip backward to release the phone (make sure to unplug the USB cable first, or you might damage your USB port). So, you can't mount the holder with the center-bottom flush against something. You can cut a hole, mount it between beams with space in the middle, or mount it in standoffs. Or whatever else you need to do.
I'm not sure how effective this thing actually is at making the USB connection more reliable; De.Evolution had a season plagued by disconnects even with this (though there's no way to tell the cause; it could have been anything from static electricity to dying motor controllers, the new system's so unreliable). However, another team using it had much better luck. I hope it will work as some kind of counter to Qualcomm, MR/HiTechnic, and FIRST's poor design decisions.
I also included the Geomagic Design (formerly Alibre) source files (including the somewhat inaccurate phone model) in the source zip file in the downloads section. Be warned, though, the model has a tendency to crash Geomagic frequently, so save often.
It has a USB cable strain relief (sized for the white Modern Robotics OTG cable, but should fit most other cords), and holes spaced for a TETRIX beam on the side plates. It also has cutouts for the volume and power buttons, the speaker, the microphone, the camera, and the headphone jack.
This holder has several different mounting options. You can mount it to a tetrix beam using the provided holes, or you can mount it to something else by drilling your own holes wherever you want in the side plates. You can also zip tie it on, or you can use ABS cement to securely weld it to another 3D printed part (see my other phone holders).
The phone is secured by a clip at the bottom, and you need to be able to bend this clip backward to release the phone (make sure to unplug the USB cable first, or you might damage your USB port). So, you can't mount the holder with the center-bottom flush against something. You can cut a hole, mount it between beams with space in the middle, or mount it in standoffs. Or whatever else you need to do.
I'm not sure how effective this thing actually is at making the USB connection more reliable; De.Evolution had a season plagued by disconnects even with this (though there's no way to tell the cause; it could have been anything from static electricity to dying motor controllers, the new system's so unreliable). However, another team using it had much better luck. I hope it will work as some kind of counter to Qualcomm, MR/HiTechnic, and FIRST's poor design decisions.
I also included the Geomagic Design (formerly Alibre) source files (including the somewhat inaccurate phone model) in the source zip file in the downloads section. Be warned, though, the model has a tendency to crash Geomagic frequently, so save often.