Monday, November 30, 2009
Update on Vehicle in some place other than comment box
It should probably be noted somewhere other than the comments box on our original design post that the design of our first vehicle has changed. To just incorporate an arm which runs off of the fixed axis. This change was made because by making to vehicles we would have had to design our own remote system to control the two vehicles independently also we would have needed more motors than we were allowed. By making this first vehicle just an arm we are within all of the requirements and the same purpose as the original design intent can be used with the new design. The new design is just a fixed arm with a keyed slot for the axle so the axle will rotate as the entire arm rotates when we rotate the fixed motor. The two other pictures are the axle and the other side of the axle which the arm will rotate on. (One update needed to the axle photos is we need another hole in the axle so as to properly constrain the axles together so they will appropriately function as an axle
Original Schedule with updates
We have added an update column for things we plan on doing in the next two weeks for our machines to be completed on time
Remaining To Do list including build process for machine 2
Our to do list is basically the build process for our second machine, b/c that is almost all we have left to do. Also a small additional to do list has been added below the spreadsheet of other tasks we must do.
We have added an update column for things we plan on doing in the next two weeks for our machines to be completed on time
Remaining To Do list including build process for machine 2
Our to do list is basically the build process for our second machine, b/c that is almost all we have left to do. Also a small additional to do list has been added below the spreadsheet of other tasks we must do.
Another update... and new schedule coming shortly
I don't have any new pictures at this point but when we post our updated schedule there will be more pictures. As far as updates on what we have done. We have our MCM done to the specifications we designed it to however it isn't good enough to be competitive yet so we need to do some modifications to it. The motor which is attached to the underside of the arm (this will make more sense when new pictures are posted, see next batch of pictures for reference) is not constrained will enough and we found the axle tends to wobble and not just rotate which causes the machine on the rack and pinion to skip and thus creating an unreliable machine. So we need to remove the wobble in the shaft and then we suspect our MCM (machine 1) will be fully operational. Also we may try as an extra precautionary measure making our MCM shorter or the shaft taller (making the shaft taller would make constraining the wobble more important). By making the MCM shorter more of the gear will connect with the rack, as it stands now only 3/4 of the gear connects with the rack and if we can get it to 100% that would be better.
As far as an updated schedule we will post a more complete updated schedule soon, however for right now..... WE need to build our second machine which consists mostly of using the band saw the drill press and the waterjet. We will cut our base out with the waterjet and then use the angle iron to cut make axle mounts and the Al rod for the axles. The most difficult task we have left is creating our hopper b/c there is still some disagreement on the best design for the hopper. However once that is figured out our machines should be fully functional and ready to be seeded.
As far as an updated schedule we will post a more complete updated schedule soon, however for right now..... WE need to build our second machine which consists mostly of using the band saw the drill press and the waterjet. We will cut our base out with the waterjet and then use the angle iron to cut make axle mounts and the Al rod for the axles. The most difficult task we have left is creating our hopper b/c there is still some disagreement on the best design for the hopper. However once that is figured out our machines should be fully functional and ready to be seeded.
Sunday, November 22, 2009
MCM parts update
We have constructed a good deal of the parts for our MCM. We still need to create the axle for out MCM which we plan on using both the mill and lathe for. The axle will have to have two different diameters which is why we will need the lathe and one of the diameters will have flat surfaces on the top and bottom so it fits in the parts shown above. After we have the axle made we just need to assemble our MCM and setup the electronics for it. Which we plan on being done with by the tuesday evening before Thanksgiving break. Our completed MCM will look like the first picture above with an axle attached to it. The MCM will rotate using the externally controlled motor and the arm will slid in and out on another motor. Also by Wednesday before Thanksgiving break we will have the rest of the build order and plan for our other machine completed.
Tuesday, November 17, 2009
MCM update 2
MCM update
So far, we have our MCM all figured out as far as dimensions and how everything will fit together. We plan on entering the ME shop this week to start fabricating parts. The three parts we plan on making for friday are the walls of the chassis for the arm and the retractable part of the arm.
We had to re-engineer some of our most critical module due to finding out certain rules and limitations but next week, we will finish designing and fabricating the MCM.
We had to re-engineer some of our most critical module due to finding out certain rules and limitations but next week, we will finish designing and fabricating the MCM.
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