Author Archives: Sophie Whiptank - aka Bart

About Sophie Whiptank - aka Bart

I'm just a bloke doing some stuff, the more interesting bits I post on my blog. Scroll down far enough and you'll see me riding from Melbourne Australia to Birmingham, England in 2014. But now I'm working on another project, a single cylinder motorbike engine at 2750cc!

Midway through. . .

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A bit messy granted, but here’s a pic taken mid way through the CNC conversion of the Bridgeport. The X axis motor is connected to the shaft, with a 15mm 5m timing belt running through a 6:1 reduction drive. All bolted up using 6mm plates cut to size.

The X axis is on the left hand side, and took some fiddling to get right. The handle manages the end float of that screw, so I had to make a bush the right size and be careful in the tightening order.

The microstep controllers are mounted neatly in a project box, along with the Arduino running GRBL. Lots to do still, but it’s keeping me occupied during the lockdown. I’m really looking forward to seeing it run now!

Back to basics

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What a crazy world we’re living in right now, with everything shut down for the Corona virus. I hope anyone reading this is safe snd well.

The enforced stay home has given me some more tinker time, so I’ve gone back to basics with a single motor & step driver. The arduino is running grbl now, and connected to a Raspberry Pi running bCNC.

It all seems to work rather well, and has really helped my understanding of how it all fits together. Nick and Matt have been a great help, remotely of course.

The next job is to fit it all into a box to mount on the wall, move the humongous power supply and get it all connected securely. The motors, mounts, pulleys etc. also need sorting, so there’s still a lot to do!

One small step(per) for man

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I’ve made a new friend in the village, just a short walk away. Enter the scene Matt, who has a full on CNC setup at home and is very smart!

So with help from Matt and Nick I’m well on my way, with borrowed step controllers, Arduino, laptop and motor. The Internet is also a great source of information for this kind of thing, so I’m hoping to have something that moves very soon!

Pulleys, belts and taper locks are on order, and I have a plate marked out for mounting the motor.

Watch this space….

Bloodrunner!

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Here’s a little something I’ve started to do, supporting the Warwick and Solihull blood bikers. It’s an out of hours service provided to the NHS as a charity, delivering emergency blood and other products to hospitals that need them.

It’s taken a while to get qualified, certified and checked out. I also had to learn the routes between hospitals – a big ask for my useless sense of direction! But I’m cleared to go and have a couple of shifts under my belt now.

It’s nice to be able to give something back doing what I enjoy. Next time I’ll try one of the other bikes, an FJR1300! Just wish it would stop raining. 😦

Dappr Aviation

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Finally, after 2 years of trawling round aircraft museums, breakers yards, ebay and gumtree! I located a piston at a very unique business called Dappr Aviation. They make quality bespoke furniture and art out of old aircraft and helicopter components.

Check out their website here
https://dappraviation.com/

They also make really cool outdoor garden pods out of slices of aircraft. They’re called Aeropods and are ideal for my secret garden, for when I’m working from home. As soon as funds allow I’ll be giving them a call.

I met with Dave who really looked after me, showing me around all the cool stuff they make. I could have spent all day there (and nearly did!). Thanks for all your help Dave, great to meet you. I’ll no doubt see you again.

Project wise this is the last original engine component I need. The rest is being made. The conrod needs boring for the main bearing and the little end bush. After that it’ll be ready to press together.

Just for fun

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I inherited a Kayak from a friend who’s moved out to Sydney. It’s an old thing, pretty mucky but fully serviceable. In fact it’s a bit of a classic talking to other paddlers. An Eskimo Topolino (spud), seems to have a cult following.

Just a mock up for the time being, but I’ve been toying with the idea of making a sidecar for the KLR for some time. The spud would make an epic body, and I have a spare front wheel – so why not?? I do intend to use the Kayak properly, so it will need to be easily detachable for paddling.

I’ve a birthday coming up so I might ask for a hydraulic tube bender 🙂 Well it beats a cardigan!

New Cool vs Old School

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In parallel to the electronic shenanigans for CNC, Bob has been applying the Mk.I grey matter to the problem of calculating the pressure required to force the crankshafts into the flywheels. For those of you who went to the old school, details are in the picture.

For those who didn’t, the upshot is that the hydraulic press we have is up to the job. We need 9.35 Tons to force fit the crankshaft. We tested the press to 11.2 Tons with some way to go. Always a tense moment though with the odd creak going on!!