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Old post but to run a simple stepper motor as a regular small speed motor, an AC supply of 24V and 2 none polarized 4,7 uF capacitors in parallel will drive the motor like a single phase motor at mains frequency. Capacitors may vary depending on the motor
Metal Stuff / Re: I bought another deader
« Last post by tom osselton on November 28, 2023, 03:05:55 PM »
Well Black Friday got me and I picked up one of the furnaces along with a Resin Printer, Resin and Wash and Cure Station! Wish me luck! lol

Project Logs / Re: Building Wildings Tower Clock
« Last post by philf on November 28, 2023, 02:40:00 PM »
Hi Chris,

In Cut 2D there's an Allowance Offset setting which will leave whatever you enter for a final cut. Or there is a Do A Separate Last Pass setting which does more or less the same thing but (bizarrely) doesn't work with lead-ins and lead-outs. (I queried this with Vectric and they did try to explain why but I couldn't for the life of me understand their reasoning.)

The lead-ins and outs mean that you don't get a witness mark where the tool plunges into the work.

So I leave an Allowance Offset of say 0.1 or 0.2mm and then do another toolpath with zero Allowance Offset.

With free cutting brass you may ne better with straight fluted cutters. I haven't got any except for woodworking router cutters.

Yes - I'm still using the converted pantograph engraver. I'll be doing some engraving of badges and trophies for our cycling club in the next week or so. Over the years I've saved them £100s.


Tools / Well Amazed with Pultra
« Last post by Dell on November 28, 2023, 02:31:26 PM »
I have been restoring a Pultra P type that I got at the recent watch & clock fair for not much money , I was pleased to see when I stripped it that all the numbers matched and even more pleased with the lack of runout, I used my Verdict finger gauge that was recently serviced and calibrated by Verdict so I am sure itís reading correctly .

Project Logs / Re: Building Wildings Tower Clock
« Last post by raynerd on November 28, 2023, 12:52:47 PM »
Hi Phil

No - that would be an excellent plan. Iíll check but I'm not sure how Iíd do that in v-carve other than generate separate vectors to follow and account for the finishing cut in the measurements.

What cutter do you use on brass. Iíve realised that picking the appropriate cutter is more than half the battle. I used a single cut 4mm cutter for most of the work and it ended up with a half decent finish but it will need hand polishing. The finish is better than I expected. Itís quite a big CNC machine and didnít expect it to cut as well as it did. Most of the work Iíve been doing on it was plastic over covid. We purchased it then when my wife was struggling with her work and it paid off at the time. Now itís just another tool in my workshop. Although in a small workshop it does take up a lot of space but I wouldnít be without it. Are you still using the converted machine / was it a pantograph? I knew it blew me away when you used it to cut those wheel cutter profiles!

For anyone who has built this clock, @smiffy or anyone else. Have you any pictures of the back of this clock, the pendulum assembly and back cock, crutch? I appreciate itíll be against the wall but any pics would be really helpful even at an angle if it is against the wall and you canít get directly behind it.

Thanks a lot

Our Shop / Re: out with the old in with the new
« Last post by tom osselton on November 26, 2023, 06:33:08 PM »
Looks good glad to see you back!
Project Logs / Re: Building Wildings Tower Clock
« Last post by philf on November 26, 2023, 05:42:13 PM »
When did you get that CNC Chris?

I use Vectric Cut 2D for parts like that - drawn first in 2d in Autocad.

Did you leave a small (0.1 or 0.2mm) cut to finish the edges? Cut 2D lets you leave whatever you like for a final cut. You tend to get a really nice finish with a climb-cut clean-up cut.
Project Logs / Re: Building Wildings Tower Clock
« Last post by raynerd on November 26, 2023, 05:10:12 PM »
I decided to go ahead with the CNC machine to cut the flat stock parts. So whilst I was on the machine I drew up quite a few and got them all done. I used v-carve to draw the parts which took a long time for me - probably others would have done this much faster. Many of the holes are cut for location and Iíll cut these to size later. I ended up doing the pendulum support brackets, quadrantal plate, back cock and bearing cocks.
Iíll move to working on the bearing cocks next, turn the bearing bushes and make some of the arbours. Quite a bit to do to make the next instalment I expect. Thanks for watching:


Our Shop / Re: out with the old in with the new
« Last post by John Rudd on November 26, 2023, 04:37:45 PM »
Nice looking shop Bob, would love to see your kitÖI guess you could get our friend John Doubleboost to do a video? 😀
Our Shop / out with the old in with the new
« Last post by krv3000 on November 26, 2023, 03:25:36 PM »
 Hi all sos for not posting for along time just their has bin a lot going on but one thing i had to do was get a new workshop the old one was past its best and needed a new roof but the cost of the new roof was out of this world so i got a per fab concrete one put up the biggest cost was the base as my garden is on a slope every thing that was in the old one is back in the new one but its all in tubs i will post sum pics of that any way sum pics of the old one and the new one 
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