This is installment four of my PC game chair build, started here.  Interested? Follow along here.

Step 4: Building the Base

Having set my design to drawings I collected my tools…

packed up my jeep…

and went to my friend’s shop to get building.

The first steps were to cut the ¾” and ½” plywood sheets to the part sizes needed.  Note that each “x” (side support) is made of 2 parts sandwiched together, so there are four plates for them, in addition to 4 wheel rails, a top plate, and two parts for the “bookshelf” underneath…

I started with the wheel rails, shaping them and drilling 3/8″ holes at the ends for the wheel shafts and 5 circular holes along the length.  the latter process was made easier by bolting the 4 rails together with the wheel axle bolts to make drilling them all together possible.  That said, drilling the holes became quite the endeavor as the  hole saw I had could only cut through one rail at a time and prying the plug out after each cut was quite painful.  But I soldiered through… (anyone need about 50 small wooden wheels?)

Next, I laid out the X shaped side members and stacked the plates for them in pairs. Similarly, this allowed me to cut all four to shape and drill their holes together.

With the sides complete, I attached the wheel rails and attached them to the base plate.  Note, up to this point I had only used drywall screws to join the pieces.  However, the leg to base joint was critical to the chairs stability and strength, so I used wood glue in addition to screws.

Similarly, I fit, glued, and screwed the “bookshelf” components in between the leg supports.

Finally, the upper standoffs were added and holes drilled to accommodate the bolt locations and pins that extend from the base of the chair’s rails.  Note that these holes were not in the drawings as I had not yet measured their placement.  This ended up being a bit of a mistake as I was quite tired at this point and missed a measurement by ~ ¼”.  Hence, if you look closely, you’ll see that I had to use a router to turn the holes into slots.  Fortunately, these errors would be hidden under the chair and not visible upon completion.

I had intended to paint the base at this point, but as mentioned previously, was beginning to make mistakes.  Instead, I packed everything home and had a pleasant dinner with my wife and father in law.  Later that night, I made the first full up assembly of the chair and.. voila!

Everything fits as planned, all the motors work, and its really comfortable! (for me at least,  if you’re not 6’1″ you might want to knock an inch or so off the base’s height)  Both my wife and a friend I sent a picture to suggested that the wood looks great next to my desk, and I have to agree.  That said, the exposed screws, pencil marks from construction, and couple of burn marks from the dull band saw blade are a turn off for me, so I still plan to paint it.  But its raining (in LA?! Crazy, I know!) and it will have to wait for another opportunity.

To be continued… (#PCSeat)

Original photos by Dana P. Howard (www.highlandwolf.com)

This is installment three of my PC game chair build, started here.  Interested? Follow along here.

Step 3: Power and Plans

Having made my seat of choice less explosive and sorted out it’s power needs, I set about installing the power supply and planning the base design.   As discussed in the previous post, I had ordered a 360 watt power supply and AC power cord from Amazon.  Installing the power supply was straight forward.  It’s three 12V output lines matched well with the 3 power input lines of the seat (2 gross motion lines and 1 line for the lumbar support) and with a little trimming, fitting, and a few zip ties, it fit nicely in the plastic tray at the base of the chair.

I’d post a video of the chair working, but given its slow motion, all you would get is a whirring sound in the background and a video of me with a satisfied grin on my face 😉

Knowing that the chair now worked, I set about figuring out dimensions for the base.  As shown in the picture above, a milk crate made a suitable first test, though at 12.5 inches tall it proved to be at least 1.5 inches too tall for me to comfortably place my heals on the ground. With the chair able to go up about another two inches, I settled on a floor to chair height of closer to 10 inches.

From there it was figuring out what kind of shape looked good that I could build relatively easily with some power tools (borrowed from a good friend) and simple lumber. I downloaded a seat model, picked out some 5″ rubber wheels, and settled on the shape below.

The color and hole pattern are still TBD, but you get the drift.

The wheels and hardware are on the way (McMaster, the Amazon of industrial stuff)  Next step is to make some drawings, get the plywood, wood screws, and paint, and get building!

To be continued… (#PCSeat)

Original photos by Dana P. Howard (www.highlandwolf.com)

This is installment two of my PC game chair build, started here.  Interested? Follow along here.

Step 2: Playing with Explosives

Having gotten my prize home and found it free of freeloading mice etc., I set about making it safe to use as a piece of home furniture.

Choosing a seat from a high end luxury car presents as many challenges as it does benefits.  According to the electrical diagram (and assuming they are still functional), my lovely seat has 8-way adjust-ability (including lumbar support! oooooh, ahhhhh), seat heating, and a passenger restraint and seat mounted airbag!  While the adjustment features would be way cool to maintain, the heat and the two small explosive devices (seat belt and airbag systems) had to go.  Nothing like fire and an actual explosion going off during a video game!  So, I turned the chair over, got out the tools, pulled up the schematic and started digging.

Disassembling the wiring harness (that harness tape is a sticky mess!) and following the diagram, I quickly identified that I could keep the adjustment buttons and functions while ditching the heater control, seat weight sensor, and a myriad of other junk.  Removing the seat belt safety restraint (explosive #1 and the belt on the far side) was a simple matter of unbolting the components, while getting the air bag out (explosive #2) was a little more involved.  I located it’s lead wire, snipping it at the base of the seat, for safety.  Then, I gently (crowbar) pulled the back panel of the seat off, removed some of the upholstery clips, and removed the airbag from the right side of the seat.

After putting the remaining seat back together, I went back to the schematic and looked up the fuses for each of the remaining seat systems.  Determining that the seat motors run off of 12V (duh) and pull a maximum of 30A (yowza!) I went to trusty Amazon to find a 360W power supply and a suitable AC chord (Prime membership can be dangerous!  and useful ;-)).

So, after much activity, I have an explosive free seat and a power supply en route to get it running.  Will it work?  Will the magic smoke escape? Can I design a base for it that doesn’t look like the cubist exhibit at the LA County Museum of Art?  Stay tuned…

To be continued… (#PCSeat)

Original photos by Dana P. Howard (www.highlandwolf.com)