Author Topic: Parslow's Skeleton Clock by Raynerd (Read 28682 times)

raynerd · « **on:** January 25, 2013, 03:12:59 PM »

Ok...rather than start in my usual way of explaining what I'm making and how I'm going to go about it, lets just start with today's positive....

MY FIRST SUCCESSFUL CLOCK WHEEL! ...after years of failures

Chuffed to bits!!!

Hopefully this will go in Parslows clock which I purchased the plans for back in November. I have all materials...just a case of working at it. More to be posted soon I hope.

Chris

raynerd · « **Reply #1 on:** January 30, 2013, 04:50:30 PM »

Next, an attempt at pinions!

I used some 8mm silver steel, turned it down to 5.69mm OD. I put the full cut on of 1.49mm and at low speeds of about 120rpm, started cutting with lots and lots of oil and a slow feed. The steel was not supported by a tail stock and so under the microscope, you can see slight vibration marks. A lot of hard work in polishing these pinions has started to bring any marks out the pinions nice and clean. The end has been centre punched a touch too far, so I'll need to turn a couple of mm off the end before I drill and ream then part each pinion to size. I've turned up 1" of pinion so have enough to make quite a few of the 8teeth that are called for however will need to make another lot up. It would be nice to try a tail stock but a. I don't have one for my 4" vertex and b. the tail stock and centre would get in the way of the cutter without some thought,

Anyway, the fruits of this evenings labour.

Alan Haisley · « **Reply #2 on:** January 31, 2013, 12:20:32 PM »

Way to go, Chris. A clock build startup.
Alan

raynerd · « **Reply #3 on:** February 01, 2013, 05:18:34 PM »

Cheers Alan, all going well so far. More progress pics soon.

Chris

NickG · « **Reply #4 on:** February 02, 2013, 08:16:36 AM »

Nice 1 chris, I'll be watching this unfold!

raynerd · « **Reply #5 on:** February 03, 2013, 05:24:29 AM »

Cheer!

Two very polite posters have pm'd me and a friend emailed me, not wanting to dampen my enthusiasm but concerned that the gap between the teeth is too big on the wheel but also questioned if this is an issue with the camera angle. I've now cleaned the wheel up and taken off any burrs, the wheel looks better and I think is now totally usable.... I guess we will see. The wheel below is the same one that is in the first post. The reverse minute wheel:

spuddevans · « **Reply #6 on:** February 06, 2013, 04:13:29 PM »

Looking good there Chris

I still have the Ferris Wheel clock on my list of projects for when I get my new workshop built, so I am keenly following your progress.

Tim

raynerd · « **Reply #7 on:** February 13, 2013, 03:19:26 PM »

Hi Tim, yes, that ferris Clock is also on my to make list!

By the way, thanks to Don who has kindly replaced my images with smaller pics that fit on the screen! Cheers don.

dsquire · « **Reply #8 on:** February 13, 2013, 05:23:09 PM »

Chris

Glad to help in any way that I can to help make thing more presentable for the masses and at the same time get more views on your posts. Good luck with the balance of the build.

Cheers

Don

raynerd · « **Reply #9 on:** February 15, 2013, 03:28:35 AM »

Cheers Don

A little bit more done. For each clock I need 3x 96 tooth 0.6mod wheels and actually a 4th 96 tooth wheel with slightly smaller OD. I`m not clear on how the smaller OD works, I see why it is done but module is related to OD so I don`t understand how you can just go and change it because you need to! Anyway, that is what the plans call for and plenty of people have built this clock so it must work OK.

Anyway, 6x 96tooth wheels:

Praying that my dividing head was turning correctly and they would meet OK!

A little polishing to do but here they are straight off the arbour.

Then after a light polish. No point fully polishing until they have been crossed out

dsquire · « **Reply #10 on:** February 15, 2013, 04:03:53 AM »

Chris

Those gears look a treat. Nice that you could cut them all at once rather than individually.

Cheers

Don

NickG · « **Reply #11 on:** February 15, 2013, 06:57:28 AM »

Look spot on those Chris

Meldonmech · « **Reply #12 on:** February 15, 2013, 07:20:49 AM »

Hi Chris,
When cutting brass wheels, if you make a hardwood support slightly larger than in dia than the wheel dia and 10 mm thick, it will prevent burrs forming on the back of the last wheel, and also improve the surface finish of the tooth form. You actually make a wooden wheel, which can be kept in stock and turned down for smaller wheels.
Cheers David

Rob.Wilson · « **Reply #13 on:** February 16, 2013, 03:32:39 AM »

Nice going Chris

You doing the crossing out by hand ?

Rob

raynerd · « **Reply #14 on:** February 16, 2013, 06:25:25 PM »

David, as always, your advice noted and will certainly try that for the next batch!

Rob, when you posted your message, I'd not considered an alternative to hand crossing out. However, your message sparked my memory in that I'd just ordered a beefy 42A 12v supply for my CNC spindle that I hadn't yet tested. In fact, it has been sat on my work bench for over two weeks. It only took me 10 minutes to wire it up and my spindle was working again. Anyway, another 20minutes on v-carve drawing my crossing outs and generating some tool paths and a test piece was cut with the spindle not struggling one bit on the brass!! I then made a little jig to allow me to centre the wheel with the CNC spindle and home it all in and after 10 minutes I had cut a wheel..including tabs...all, in my opinion, looking very professional indeed....far too neat for my workshop!

So there it is...I've cheated and used CNC but hey ho...I built the CNC machine itself so that surely that scores me some points back!?!?

I'll clean up the tabs tomorrow and post some more pics.

Edit. Hope the img size is ok. Posted off my ipad but have tried to adjust them. If not, will edit images on the pc tomorrow.

dsquire · « **Reply #15 on:** February 17, 2013, 12:49:42 AM »

Chris

Those are looking good and should clean up real good. Photo size is great as well.

Cheers

Don

Rob.Wilson · « **Reply #16 on:** February 17, 2013, 03:41:06 AM »

Quote

So there it is...I've cheated and used CNC but hey ho...I built the CNC machine itself so that surely that scores me some points back!?!?

I see no cheating Chris , you used the tools available to you ,a tool you built

, Those that think CNC is cheating don't understand CNC , they just think its just a case of press the button marked "cross out clock wheels " and out the part pops

, they be the same folk that think nothing of buying a set of castings .

Rob

sbwhart · « **Reply #17 on:** February 17, 2013, 04:15:53 AM »

Very Impressive bit of work Chris

Stew

NickG · « **Reply #18 on:** February 17, 2013, 04:59:05 AM »

That was awesome, well done, must be even more satisfying using a Cnc machine you built yourself and getting results like that!

Stilldrillin · « **Reply #19 on:** February 17, 2013, 06:11:59 AM »

Superb work Chris!

David D

vtsteam · « **Reply #20 on:** February 17, 2013, 10:37:20 AM »

Great job with the motorized spindle.

I have the makings for one (brushless motor ESC, collet spindle holder, and collets,) but have yet to start to put it together. Yours is very inspiring.

Alan Haisley · « **Reply #21 on:** February 17, 2013, 12:17:21 PM »

Love it, Chris.
Of course, with that CNC spindle you may want to consider S-curve spokes

Alan

micktoon · « **Reply #22 on:** February 17, 2013, 03:47:02 PM »

Looking good Chris ................

, although I have no CNC stuff , I am with Rob, use what you have to do the job , especially when you have built the CNC yourself

................ its legal

Cheers Mick.

doubleboost · « **Reply #23 on:** February 17, 2013, 03:58:43 PM »

Very nice tidy work
I bet Joseph Whitworth would have used a CNC if he had one

John

millwright · « **Reply #24 on:** February 17, 2013, 05:01:02 PM »

Nicely done Chris, Nothing wrong with using CNC especially when you have built that yourself. You have it you use it.
John

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Author Topic: Parslow's Skeleton Clock by Raynerd (Read 28682 times)

Rob.Wilson

Rob.Wilson