Here is a list of all the postings Clive Brown 1 has made in our forums. Click on a thread name to jump to the thread.
|Thread: Boxford Model C lathe change gear cover|
No, the pivot at the rear end of the arm takes the full weight of the cover when it is swung open. A knurled screw, as mentioned by Rob, holds it firmly when closed.
The cover on my ME10 is hinged on an arm that clamps on the rear shear of the bed.A peg on the cover fits into a hole at the end of the arm, allowing the cover to swing. The arm's slightly curved. Hope that helps.
|Thread: Arbor Press|
But what was holding the glass up against the force from the fist?
|Thread: Loose table on Fobco Star|
I think that's a bit unfair. The opening sentences praise the high quality, precision and smoothness of the Fobco product. If the same basic machine was sold for over 40 years it couldn't be too bad.
|Thread: Info' that might be of use to Warco Lathe owners.|
+1 that a carriage lift of 0.018mm is not really significant, but I wonder if the quoted measurements are wrong. Th OP refers to using a feeler gauge of 0.015mm inthe gap. If such a thing exists, I've never seen one.
|Thread: Replacing a 24V AC machine lamp|
Not helping a great deal, but Iunderstand that halogen bulbs are, or will shortly be, banned for sale for domestic use. When I recently looked to replace one, I found none in the normal retail outlets. It's LED or nothing it seems
Edited By Clive Brown 1 on 18/06/2022 18:48:26
|Thread: 'Mechanics' Weekly Magazine 1946|
Under their 1000 class list of castings etc. Reeves 2000 also list links to 2 downloadable pdfs of the construction series which you may be able to use.
|Thread: Governor drive belt|
On my recently completed ST Williamson I used nitrile o-ring cord from e-bay, about 2mm dia. cut to length and joined with superglue. The joint seems reasonably durable though it's only a dummy govenor and I don't run for extended periods.
Cutting the cord should be done with a scalpel blade or similar to give good square ends.
|Thread: Centaur Valve Timing|
Thank you all for these further thoughts and comments which reassure me considerably. This is the first IC engine that I've built so I have no real experience to draw on. Whilst I did think that the valve overlap etc seemed strange, ETW's reputation made it difficult to ignore "the words and music" despite the inconsistecies. I will now set the valves to what seems sensible positions.
A good tip about ignition timing.
MichaelR; a very nice engine, hope mine turns out somewhere near that result.
Once again, many thanks,
Frank, thanks for follow up, seems we're both in the same boat. With me it's both valves, and the inlet shows greater difference from spec. than the exhaust.
Thanks gents for quick replies;
Jon, I had read ETW's build notes re lost motion in the valve train, i did mention tappet clearance in my post but the timing differences I'm seeing are too large for this I think.
Hopper, My mearurements are with a scale on the flywheel with a dti on the rockers as you suggest. I agree that the follower geometry will affect the measured valve lift for any given intermediate position of the cam lobe, but, for a roller follower at least, I can't see it altering the angular positions of the start and finish of the valve movement. Those positions coincide with the roller crossing between the base circle and the two cam flanks, which are tangents to that circle. This angular distance is fixed by the cam shape itself. In your post you seem to suggest that extra angular distance might result, whereas I'm seeing a shorter opening period, this with virtually no clearance in the train.
Bricky, you say your engines work, why are you considering new cams? I'm thinking along that line with the Centaur.
I'm in the process of setting up the valve gear of my Centaur gas engine. Having made the cams to drawing, I can't achieve the specified valve timings. Both valves have opening periods that are too short.The drawings are shown below.
The inlet and exhaust cams lift over 220deg and 240deg. resp. and slightly less if tappet clearance is present The timing diagram calls for 240deg. and 250deg.Which is correct, does it matter much or have I got this wrong? Since ETW was a very respected designer and the Centaur is a long established design I'm surprised to find this apparent discrepancy. Comments would be appreciated.
|Thread: Issue with fire tubes blocking up 3.5" Rob Roy|
if you haven't already done so, can I suggest that you give Welsh steam coal a try. Not too widely available these days but it can still be obtained.It's listed on Ebay, although I haven't bought any from there. In the past when I have run my Simplex on it I found the ash and clinker residue considerably less than with other domestic coals so it might improve your loco's steaming.
|Thread: Loose table on Fobco Star|
Just measured. Clamping my Fobco table closes the slot by 0.008" to 0.010" so if your hole over-size is much above that figure then clamping is going to require a lot of torque on the handle. As said, there is a possibility of fracturing the casting assuming, as probable, it's cast iron and not cast steel..
Although not a simple solution. it might be feasible to put a split-clamp through the casting between the column and the table itself, although the table would tend to interfere with the clamp handle
I've owned my bench Fobco for 40+ years, and throughout that time I've done just as you have. The casting is very rigid and it seems that the slightest wear will cause this looseness and the standard ball handle is a puny affair only about 3" long. An easy mod. hasn't suggested itself, there's not really enough metal in the casting to fit a split clamp. To avoid making it any worse I do try to minimise the number of times that I need to adjust the table height by having several pieces of wood of differing thickness to put under the vice/workpiece if safe and appropriate.
Edited By Clive Brown 1 on 11/06/2022 11:09:49
|Thread: Failed Miller Transportation|
I would say that it does. That person/ organisation has the contract with the carrier and therefore the legal right to discuss responsibility and possible compensation, although we don't actually know if the transportation arose from a sale or just a re-location of the machine.
Separately, some effort seems to have been made to support the machine in the van. Strange how delivery seems to involve a pallet differing from the original one
|Thread: Buried-cable detector|
I bought one of te cheaper brands from a DIY shed. My need was to detect wall studs, I was not very impressed. Positional indication was vague, tapping the wall with my knuckles seemed just as good. When I tried it for mains wiring results were just as unimpressive. I certainly wouldn't trust it to avoid hitting a buried wire.
|Thread: The Correct Way To Sharpen Drill Bits Using A Picador Drill Sharpening Jig With Custom Base|
I very occasionally use the side of my grinding wheels although I can fully see why the practice is frowned upon on safety grounds. But irrespective of this, surely a practical problem with regular use of the side of a wheel is the difficulty of regular dressing to maintain shape and cutting efficiency. Setting up a jig to routinely use the side of the wheel will run into this difficulty. Isn't this the type of job that cup wheels were invented for? They're all side!
|Thread: Advice on Belt Tensioners|
I find myself wondering why the OP wants a variable speed drive on a grinder. I understand that grinding wheels are best driven at their optimum speed. Too slow and they run soft and wear quickly. Too fast is dangerous. If the speed variation is to allow for different sized wheels then great care is needed to avoid mistakes and over-speeding.
|Thread: Warning buyer beware|
Glad to hear the OP seems to have resolved the issue, albeit without the item he wanted. Looking at what I believe is the listing, the seller shows a fairly sizeable feedback score and at 100% which makes this problem rather surprising.
I joined Ebay some 20 years ago and my experience has been very good, the couple of problems that have arisen in that time having been quickly and amicably resolved at no cost to myself. The vast majority of sellers seem very keen to avoid negative feedback but the one in this case seems to have fallen from grace.
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