What Did You Do Today 2019

Today I did some Model Engineering instead of Motorcycle Engineering. I did this for one of the members of our local society. It is a splasher for a 5" gauge Stirling Single to the Clarkson Design, I machined it so that the brass strip edging that would normally be soldered into position is left as an unmachined area whilst the rest of the part has about .015" machined off all over.

I had some difficulty generating the G-codes for both left and right hand sides however, perseverance won the day. I think it had something to do with the mirror image of the opposite side to produce left and right splashers and the heights selected.

I have the other side to do and also the front bogie splashers but these will have to wait for a while because holidays are due.

Edited By Bob Rodgerson on 12/01/2019 11:46:29

I have just received a parcel from Arc. I have been dithering over their one-shot oiling system for some time and, now the bits have been added to the clearance list, I finally succumbed to the temptation.

Is that for the F1 Dave ?

Emgee

No, for my Myford. The F1 only has three oiling points (and an oil gun that is infinitely superior to the Myford one).

I think that the oilers might be a push fit (correct me if I am wrong) and the thought of stripping the mill, tapping the holes, cleaning & reassembling it makes me go weak at the knees!

Dave

That's great wok on the splasher Bob, nicely done!

Spent the afternoon pottering about, did a bit more welding on the frame for the 47, sharpened a couple of drills and made a new head for my Thor hammer. Didn't have a suitable lump of copper, so wound one out of some earth strap.

Looks like a good model of the Big Bang and the Spiral Universe.

HNY!

Today I removed the old motor off of my powered saw and fitted a new one so that I can get the blade to run the correct way. The old motor was not the original and the previous owner had removed two of the mounting holes from its frame, the new motor fits the plinth correctly but I did have to make a shaft extension to allow the pulleys to line up correctly.

This coming week I will get some grub screws so that I can fix the extension to the motor shaft, and then I will make a table for the saw so that I can use it in the vertical mode and in the horizontal mode.

Martin P

Like a metallic version of the rawhide head .

Made me want to get a Chelsea bun!

Made a needle valve for a small carb,wanting it to be concentric with the 20deg inclusive angle which I ground with my toolpost grinder and then turned the needle down from .125" to .055"with a razor sharp eccentric tool this took a while with a depth of cut at 3000" and backed the tool out to take out the spring.This was buttock clenching and on completion I had a tot of rum.

A good new year to you all and thanks again to all the help I have received from members of the forum.

Frank

I'm not sure this is quite tea room relevant, but I was looking at gear cutters on eBay today. It was one of my 'Christmas list' items that didn't quite make the stocking.

I have no particular project for gear cutters, but feel certain that I need some!

The reason I think this worth a post is that my search turned up this item on eBay which purports to offer a 1 - 8 set for £12.80 including postage. As the next cheapest is about £37.00 I expect this is a bad entry, but felt it couldn't be ignored! So i've shelled out my £12.80 and hope that it comes through.

You will no doubt sneer at the quality of Hong Kong exports, but to be perfectly honest, that would be reasonable value if I just use them as coasters!

Iain

Iain, you have just cost me £12.80. I just could not stop my finger pressing the buy button for the set of cutters. Like you I do not have an immediate plan for them but have wanted to try gearcutting for years but never got round to it. At that price there is very little to lose and perhaps a lot to gain, so hears hoping they are at least usable.

Doug

Edited By Douglas Johnston on 13/01/2019 18:44:42

It'll be interesting to see how they perform. Also interesting to note that the pressure angle is 20 degrees, a lot of the far east cutters are 14.5 degrees. They seem to be missing depth of cut information, so some experimentation may be needed. One thing we can say for sure is that whoever was operating the engraving machine was imitating a newt.

Andrew

Edited By Andrew Johnston on 13/01/2019 18:52:32

Finished fitting a tachometer to my Super7.

Interestingly the instructions state that the sensor will operate up to 10mm away from the magnet but in my case I had to close the gap to around 2 to 3mm before it would work.

Then mounted the display into an ABS project box which I'm also utilizing to mount the displays for my poor man's dros. To initially test the system I simply powered it with a 9volt battery (PP3) but I realise that the battery life would be a bit of a limitation so rummaged around in various places and found an old 12volt wall mounted power unit which is what is powering it in the photo. I did briefly consider powering the dro displays in a similar way but so far these have working for nearly three years on the original set of coin cells so I don't think I'll bother. I'm sure some of the purists on this site will wonder why I bothered but with a VFD driving the lathe motor it is difficult to to assess what the spindle speed is and anyway for around £8 it turned into an interesting project for a few afternoons.

Phil

Phil, Do you know if the tacho also provides an output pulse that can be used by something else? Perhaps the sensitivity was specified for a magnet flat on and would improve with the sensor facing the magnet, not that it matters now it is working.

I have a nice note from the vendor of the £12.80 gear cutting set explaining that the batch they got in was poor quality (yeah, right). They offered no options, so I asked when they would get a good batch in....

You never know - I might just get something if I keep on. At least a refund...

Iain

They made a mistake on the listing for the sets and cancelled the listing relisted now with proper price for the sets

The next note tells me that they don't expect to get a replacement from the manufacturer and they have finally suggested a refund.Of course I've said yes....

Well, the outcome (nothing) was what I expected, but still worth a try..

Iain

I second the magnet orientation reducing the operating distance but as Bazyle says it working, so just leave it alone.

As installed the magnet is presenting the N & S poles equally to the sensor face so possibly have a cancelling out effect. There are lots of different sensor types and some which have an internal magnet might be upset with a moving magnet.

Ian P