Senior Design Team #10

Planar Cable-Suspended Haptic Interface for the Rehabilitation of Fine Motor Skills

Yearly Archives: 2014

Testing ACS 712 Low Current Sensor

This entry was posted in Current Sensor Testing Test Data on April 14, 2014 by Phil Smith

To test the current sensor an arduino, a multi-meter and a current source was used. To calibrate, the offset and the gain was first configured. With no current on the sense lines, the Vref was adjusted to read about 2.5V (actual valued used was 2.52V) on the sensor output line. A known […]

Patent Search: Haptic interface for a virtual environment

This entry was posted in Literature Review Patent on April 14, 2014 by Daniel Sims

Patent number EP2251767-A1 is another interesting find in our patent search. It has the potential to be an extremely affordable system since it only uses one motor. This makes it viable as a game control for a tennis simulation or rowing simulation, for example. The article kept bringing up the load […]

Assembly Nearly Done

This entry was posted in Assembly Fabrication on April 6, 2014 by Daniel Sims

It’s so cool, the assembly looks exactly like the CAD.

Knot Causing Damage in Spool

This entry was posted in 3D-Printing Fabrication Spool Test Data on April 6, 2014 by Daniel Sims

During routine testing of the design, we noticed that the knot tied at the end of the fishing line to secure the line to the spool dug into the plastic of the spool, causing minor damage. We’ve solve this problem by ending the string around a washer.

Stanford Seminar – Ken Salisbury on Haptic Systems

This entry was posted in Literature Review Stuff from the Web on March 29, 2014 by Daniel Sims

[youtube]https://www.youtube.com/watch?v=xHN8wCNVZQo[/youtube]

The most important part of this lecture occurs around 52:00 where there is a discussion of the virtual wall algorithm.

Stanford’s Two Classes on Haptics

This entry was posted in Stuff from the Web on March 29, 2014 by Daniel Sims

While browsing the web, we’ve found out the Stanford has two classes on haptics. ME 327: Design and Control of Haptic Systems CS 277: Experimental Haptics

Machining on the Fadal

This entry was posted in Fabrication on March 27, 2014 by Daniel Sims

The shop was a bit crowded today, so we have to machine on the old school Fadal machine. Using this machine is a test of skill has it uses pure Gcode as opposed to the conversational language the Fryer mills use.

Lessons from Initial Assembly

This entry was posted in Design Fabrication Test Data on March 27, 2014 by Daniel Sims

We’ve competed assembly on one of the three Motor and Spool Sub-assemblies and we’ve discovered a few problems in the design. 1) The set screws are not holding onto the main shaft and are likely to be striped since the thread are made of plastic. Solution: Drive a pin […]

3D Printing First Spool

This entry was posted in 3D-Printing Design Fabrication Spool on March 23, 2014 by Daniel Sims

We 3D printed our first spool today. It’s amazing that the spool comes out of the machine ready to use, no filling required. To remove the support material, we must soak the part in a base bath for 24 hours.

Milling the Strain Plates

This entry was posted in Fabrication on March 21, 2014 by Daniel Sims

This is one of the last pieces. The plate goes between the two eyelet plates to support the strain gauge system. We are almost done! Woot! Also, 1 to 1 scale drawings are cool because one can put the part on top of the drawing and have them match up.