What We Have Done This Week
This week, we continued testing the hall effect sensor and we started testing the limit switches. We are still thinking of how to design the packaging for the electronics and will soon 3D print a box for it. Currently, we are waiting for more limit switches and the rotary encoders to arrive. We have written code for the rotary encoder, but none of us have experience using one, so we have to wait for them to arrive.
As for the mechanical portion, we recently received the McMaster order, which contained items such as the 4140 steel rod, and 5/16"-18 set screws with Loctite. Although we don't all have access to ENGR 123, we were able to use the miter saw within the Superway building to cut portions of the rod for fabrication next week. The CAD models for the updating steering system has been completed and we are prepared to machine the parts immediately after getting the door codes for 123.
Another thing that we have done is send out a request for the central machine shop in ENGR 189 to bore two holes and tap them within the steering gear. We plan to do this and insert set screws into the gear. This method allows the gear to be clamped into the steering shaft with a three tooth chuck configuration. The previous team welded the gear into place, but we would like to make the bogie easy to repair and deconstruct.
Recently, we have begun researching regen braking in conjunction with mechanical braking methods, such as ABS and hydraulic. Although difficult to incorporate, we feel that if we work quickly enough and research enough material, we will be able to fabricate the mechanical and regen braking by the end of the summer.
Project Specifications
The electronics have to fit nicely in a package but also accessible for wiring. The code has to run with all the interrupts corresponding to each sensor.
The bogie must be able to reliable steer and resist fatigue. It must also be able to brake and initiate a fail-safe in the case of failure.
Project End Goals
This week, we continued testing the hall effect sensor and we started testing the limit switches. We are still thinking of how to design the packaging for the electronics and will soon 3D print a box for it. Currently, we are waiting for more limit switches and the rotary encoders to arrive. We have written code for the rotary encoder, but none of us have experience using one, so we have to wait for them to arrive.
As for the mechanical portion, we recently received the McMaster order, which contained items such as the 4140 steel rod, and 5/16"-18 set screws with Loctite. Although we don't all have access to ENGR 123, we were able to use the miter saw within the Superway building to cut portions of the rod for fabrication next week. The CAD models for the updating steering system has been completed and we are prepared to machine the parts immediately after getting the door codes for 123.
Another thing that we have done is send out a request for the central machine shop in ENGR 189 to bore two holes and tap them within the steering gear. We plan to do this and insert set screws into the gear. This method allows the gear to be clamped into the steering shaft with a three tooth chuck configuration. The previous team welded the gear into place, but we would like to make the bogie easy to repair and deconstruct.
Recently, we have begun researching regen braking in conjunction with mechanical braking methods, such as ABS and hydraulic. Although difficult to incorporate, we feel that if we work quickly enough and research enough material, we will be able to fabricate the mechanical and regen braking by the end of the summer.
Project Specifications
The electronics have to fit nicely in a package but also accessible for wiring. The code has to run with all the interrupts corresponding to each sensor.
The bogie must be able to reliable steer and resist fatigue. It must also be able to brake and initiate a fail-safe in the case of failure.
Completely integrate the hall effect sensor, limit switches, and rotary encoders. Electronics are packaged nicely and protected.
The ultimate goal is to have an easily accessible and fatigue resistant half-scale bogie with reliable braking and fail-safe systems incorporated.
The ultimate goal is to have an easily accessible and fatigue resistant half-scale bogie with reliable braking and fail-safe systems incorporated.
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