rand robinson
kr2s
kr-2s
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KR2S

cad
Darren & Hardy's KR2S Project

Machining


Timber selection took time as I was tossing around a few options.  Buy a "spruce" kit machined here in Australia for around $3,000, or go the "hoop pine" kit at around 1/2 the price.  Hoop pine is a certified aircraft timber and was used during WW2 to build Beaufighters and Mosquitos.
The third option was to buy "No. 1 Clear Hoop Pine " lengths of 8" x 1" x 17' and machine them to the desired dimensions.  Needless to say, I took this $500 option.
Here I have clamped the length to timber to the side of the workbench and the removable bench extension.  A 1" line has been marked down the right hand side and I'm about to rip the plank with a brand new saw blade.  The old one was rusty and I prefer my aircraft timber to be cut instead of mauled.
As the saw cuts further along the length, the strip starts to hang down, threatening to split.
To avoid splitting, I use a couple of clamps to support the strip to the main piece of timber as the saw cuts further along.  

My garage is not as long as it looks in this photo.  The bench extension in the foreground is in fact outside the garage.  I screw it to the end of the workbench each day I work and unscrew it when I have finished.
Here is my favorite tool.  The thicknesser.  I feed in the 25mm square strip and it planes of up to 3mm with each pass.  The roller inside draws the timber through by itself and all I have to do is support the length as it passes out the back.  The thicknesser is LOUD and produces a lot of sawdust which is why I have a workshop vacuum connected to the exit chute.
pantograph Hardy has managed to buy a pantograph from work which he will be converting into a CNC.  At 1.5 tonnes it took a fair amount of effort and time to move it from work to his house on the back of a rented tandem car trailer.  Getting it on the trailer was easy using the crane.  Getting it off was another story.
steel ramp We were still undecided as to how to get it off the trailer until we arrived, deciding to dig holes for the trailer tyres to drop into.  We then disconnected it from the car and jacked the front up until the tail rested on the ground.  The dirt ramp was shoveled from Hardy's driveway and then a sheet of 10mm steel layed on top.  
pantograph on skates Chains were wrapped around the base and hooked to the winch on the front of the trailer.  We didn't want this 1.5 tonne baby accelerating away from us.  With Hardy lifting each corner with a crowbar it was my job to slide the four skates under, trying not to lose any fingers.  Slowly, slowly we inched the pantograph off the trailer and across the garage floor.  Constantly stopping to replace skates that moved out of position.
pantograph in place Finally after 8 hours, the pantograph was at its new home.  Hardy, his son Riley and myself were knackered.  We celebrated with a feed of fish and chips.  We look forward to machining many components for the KR2S.