Author Archive

Bumpers, and practice/development

Today the bumpers for team 254 were completed and are currently en-route.  The embroidery looks great.  The bumper tubes may need to be milled slightly in width, to account for thicker-than-expected fabric.  This would allow the attachment pins to insert into the robot further, if they do not quite reach.  A couple members from team 968 will be spending the weekend at the 254 lab, to install revised components, practice driving, and develop code.

Bumper Progress

Foam pool noodles have been affixed to all 8 bumper assemblies.  The fabric for all the assemblies has been cut, and sewn in the corners.  The fabric is currently at the embroidery shop.  Currently, we expect to receive the 254 fabric pieces back on Saturday 3/6.  They will then be adjusted for fitment, and permanently assembled to the bumpers.  The 968 bumper assemblies will follow suit next week.

Bumpers and Drilling

Today progress was made on the bumper pieces, including machining the wood and corner brackets.  We hope to finish the bumper structure by the end of Friday, to begin material cutting and sewing on Saturday.  At this time, I do not expect the bumpers to be complete before ship, as the sewing is estimated to take a few days.

Tonight we drilled the arms to fit the bushings.  Below is a picture showing the drilling operation.

Tomorrow we will begin assembling the arm, and make any necessary adjustments for proper fitment.

Bumper Fabric

We now have bumper fabric.  The picture below shows the colors.  The material and color looks great in person, better than the picture.

Bumpers and Control Boards Started

Today our procurement personell spent the day picking up several parts and materials, including plywood for the bumpers and switches, wire, and LEDs for the control boards.  The plywood selected for the bumpers is a premium quality 12-Ply 3/4″ Russian Baltic Birch.  The 5″ height blanks were cut today, and will be cut to length tomorrow.  Below is a picture of cutting the bumper pieces.

The picture below shows construction and testing of the LED driver circuits for the control board.

Finally, we picked up the other two upper arm segments from welding. They are shown in the picture below.  These are for 254.

Arm Parts and Welding

After an all-night machining marathon last night, the arm parts were completed to be welded today.  Our generous supporter Foes Racing was able to align and tack weld all the pieces into place this evening. Foes did the welding for the launcher and top arm in 2008 also.   Below are some quick snapshots of the parts just before leaving Foes for the evening.  The arm parts will be welded tomorrow night.  Please take a close look at how everything is assembled, and quickly bring it to our attention if anything seems incorrect.

Efforts were made to align holes in waterjetted pieces with holes in the box tube pieces, and to ensure squareness during the tack-welding process.  After welding is complete, a 0.875 reamer and a 1.250 reamer will be needed to enlarge the holes in the waterjetted pieces.  Additionally, all threaded holes still need to be drilled and tapped.

Control Board Progress

Today we were able to cut out the polycarbonate for a control board on the CNC router at Glendale Community College.  It took much longer than expected, due to the polycarb melting at any feed rate over 18 IPM, even with a constant cool air blast on the endmill.  Machine setup took about 75 minutes, and fixturing, cutting, and removing the panels took about an hour.   Tomorrow evening we will finish cutting the second board.  Below is a picture of the assembled control board.

Weekend Progress

Manufacturing:

Tonight we completed the four piston bearing blocks (1010073) for the kicker winch.  These took much longer than anticipated using manual machines.   Below is a picture of the completed parts:

For the small piston bearing blocks (1010019) we hope to have a CNC lathe available tomorrow evening.  Tomorrow we hope to cut out the control boards as well, on a CNC router.

The 1 x 2 x.125 box tube parts for the arm structure have been cut, and are currently undergoing milling and drilling operations, and preparation for welding this week.

Bumper Mounting and Control Board Parts

Today we completed the 32 bumper mounting pins and brackets, and 20 control board spacers.  The bumper mounting scheme is nearly identical to the 968 2009 bumpers.  The finished parts are shown below.

Next, we hope to cut the control board polycarbonate on a CNC router, and machine the piston bearing blocks (cones) on a CNC lathe.  Additionally, we will be cutting the 1×2 box tube parts needed for the arms.

Welding Complete, Off to Powder Coat

Today the welding was completed at Ride & Show Engineering, and the frames were delivered to Central Powder coating. The picture below shows us with the kind folks at Ride & Show.