Member postings for Russell Eberhardt

When was that Ady? When I first went to university in 1964 the fees were paid by the County Council as was the grant. The grant was sufficient to pay for all accomodation and living expenses. I came from a working class background and would certainly not have gone to university with todays system which is certainly for the rich

Russell

...or you could make anti-backlash delrin nuts similar to those described by Brian Pitts in the Yahoo

Russell.

I may be biased having gained degrees at these two universities but have a look at Southampton and Surrey . Southampton in particular has a very wide range of courses to suit all interests.

Of course the Enginering Tripos at Cambridge is very good but probably out of reach..

Good luck with your grades.

Russell.

Brass does work harden so bending it to shape will harden it to a certain extent. You will not be able to harden it by heat treatment.

Another way of hardening it is planishing (otherwise known as beating it to death with a hammer!) but I doubt you will want to do that.

Russell

I don't know where in France you go but this looks to be an absolute snip!  On the other hand I'd be careful in case it's a scam.

Russell.

Edited By Russell Eberhardt on 03/04/2012 14:31:40

Edited By Russell Eberhardt on 03/04/2012 14:34:10

You can use the round polyurethane belting with V pulleys. There is a simlple conversion shown here.

This belting is available in France from the link I posted above at only 3 to 5 euro per metre depending on diameter. I have found M & P's service to be good.

Russell (also in France)

I've seen a number of belt drive conversions using round polyurethane belting. You can buy it here http://www.mp-france.com by the metre and weld it with a hot knife. Look for COURROIE DE TOUR in their catalogue.

Russell.

I have a coffee machine in which I have replaced a plastic nozzle with brass and I'm still here - but then when I was young we had lead pipes and they were considered safe.

Russell.

According to my manual P73 should be set to 0 for 0 - 5V input on terminal 2. Also check that the voltage gain parameter C4 is correctly set, it should be somewere near 100%.

Did you try the suggestion made last time you asked.

Russell.

I can't see a file there on cutter making. Is it still there. What's it called. Or am I just going blind in my old age.

Many other useful files though.

Russell.

Mine too but I did give the thread on the backplate a light skim to make sure the chuck is located on the register and not the thread.

Russell.

Decide how much lighting you need then double it. You can never have enough. Oh, mount the flourescent tubes some crossways and some longtitudally to minimise shadowing.

I have four five ft tubes in my 3m x 6m workshop plus lights on each machine plus a number of halogen desk lamps to move around as required but I still struggle sometimes.

Russell.

On my shopping list. Much easier than winding the handle on my dividing head 22.5 turns between each face to cut squares!

Russell.

Thorntons who make cutters for clock gears sell six different cutters for pinions from 6 to 16 leaves but just one wheel cutter for all sizes of wheel. Theoretically each wheel will need a different cutter but not in practice.

I've not tried making my own cutters but the same principles apply as for involute gears. Some good advice is given here

Russell.

Whoops - finger trouble. I meant this

I suppose I prefer DraftSight because of the similarity of it's interface to Autocad. This dog's a bit old to learn new tricks.

John is absolutely right about 3D programs - great if you use them all the time and are designing complex plastic mouldings or assemblies or want to produce presentations. I spent a couple of weeks learning Solidworks a few years back and found, yes it can produce great models but if I want to get something done quickly I always go back to the 2D program and I don't forget how to use it!

Russell.

Yes, I found the same problem. The slightest bow in the base makes a significant error.

You shouldn't need to turn the wheels down as there is plenty of cearance at the root of the pinions. Just go a bit deeper with the cutter.

Russell.

The Seig machine should be adequate for your needs but the advice is always to buy as big a machine as you can afford/house.

There is a reputed weakness in the gears in the head but a friend of mine used one for years with no problem.

Russell.

Yes, Draftsight is comlicated and any CAD system takes some effort to learn. There is a good tutorial for Draftsight here: Download It is worthwhile working through at least the first few chapters.

I started with Autocad many years ago and Draftsight is the only free/low cost package I can get on with.

Russell.

Or set them up for cutting again and run the cutter in by a thou ro two?

Another posibility would be to fit bushes and recut the recesses.

Russell.

At room temperature sodium ferrocyanide is perfectly safe due to the strong bond of the cyanide with the sodium. As Dick said, it is used as a food additive.

Concerns have been expressed over its safety at high temperatures where it could become disassociated hence the banning of the original of Kasenit by the Health and Safety police. However it is still used in the coating of welding rods

Russell.