Another Paddleducks build log

Gallery, Projects and General > Project Logs

<< < (45/70) > >>

spuddevans:

--- Quote from: kvom on October 12, 2009, 12:19:37 PM ---The chamfer gives a bit more surface area for the solder to adhere to, esp. if the rod is a tight fit in the hole.

--- End quote ---
Ahh, That makes sense, thanks Kvom :thumbup:

Tim

spuddevans:
I got a little more done today on the forks.

I started out by mounting one on a parallel ( that's right, just one parallel as two were thicker than the fork itself ) in the vice and then milling out the middle with a 3mm cutter. I did toy with using a 4mm cutter as that is the desired slot width, but then I remembered reading that when milling a slot, a cutter of a given diameter will often cut oversize when it is cutting on both sides at the same time. Well as you can see, these forks are only 6mm wide and I didnt want to risk making the side walls of the fork-bit too thin, so I used a 3mm cutter and then just took an extra pass across each inner side of the fork to make the slot 4mm with the walls 1mm each.

Then it was on to drilling and tapping. The forks are drilled and tapped thru, M2.5 at the top end. So mounting them in the vice they were centre drilled and then drilled thru 2.1mm. I left them in the vice to tap them, I just wound the x-axis to one end to give clearance and then put my tapping stand next to the vice and swung the arm over to tap the holes. I did this as I dont have a vice for my tapping stand yet, and holding these little pieces by hand would not have worked out so good for tapping squarely.

Then it was time to roll out my latest version of my vice stop.

( by the way, that hold-down is only tightened up just enough to hold the 2 parallels in place, I reckon if it was tightened up real tight the whole lot would not be very stable, but this setup allowed me to have the whole of the fork gripped by the vice while I gently drilled thru for the pin to hold it to the block on the eccentric rod )

After all those shenaninaninanigans :scratch: ( drumroll please ).........here is a finished fork. The overall dimentions are 11mm tall by 6mm by 6mm.

And here are both of them with the eccentric assembly's

Onwards and Umm, sideways? :scratch:

Tim

chuck foster:
looking good :thumbup: :thumbup:

chuck :wave:

Bernd:
Hey Tim,

It looks like you need to take a bit of time to make yourselve a vise stop. :D

Nice job by the way.

Bernd

spuddevans:

--- Quote from: Bernd on October 14, 2009, 06:51:07 PM ---It looks like you need to take a bit of time to make yourselve a vise stop. :D

--- End quote ---

You know what, you could be right, in fact, you are right!! I really do need one, but I want to get on with this build, and nessesesesesety being the mother of invention, I keep coming up with ways to make a temp' vice stop to suit what needs to be done at the time. Lazy I know, but I try to kid myself that I will have a better idea of what I want from a proper vice stop by making up these temporary forms. (well that's my excuse and I'm sticking to it :lol: )

Tim

Navigation

 Message Index

Go to full version