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Fair point. It must be about 40 years since I read that...

It's interesting that perfection often gets associated with uniformity... The greater the unifomity in a repetitive series, the more critical the form of each element in the series becomes! There's nothing more vacuous than badly proportioned machine turnings.....

A useful reference on this subject is "The Nature and Art of Workmanship" by David Pye

I've no experience with it. SAE10 is what's normally recommended.

Voila... https://forum.canadianwoodworking.com/f ... hicknesser

Chains wear if they're not lubricated. That one's parched :wink:

If you've run out of adjustment on the jockey, it should be easy enough to take a link out. You'll need a chain breaker tool. Chain wear will only be a problem when the pitch gets too elongated to mesh properly with the sprockets. The two feed rollers are free to rotate independently, their...

Logically, it should do... Have you tried?

It does seem a reasonable way to go for the BAO/S Cutterblock motor: rewire to Delta and use a 3 hp 240V inverter. Feed motor: Use a separate 240V inverter set to 29Hz so that the motor will run at 1000 rpm and 500 rpm (instead of 1500 and 750) depending on the position of the 2 way switch...

If you only need the lower speed, you only need the power for that speed to maintain the same torque. Effectively, it's variable power constant torque switching. Isn't that right? The feed motor on the Wadkin is rated at 1/2hp at the high speed and 1/4hp at the lower.

Thanks. Good ideas there. I appreciate your advice. My lathe is a Myford (254 plus). Single phase! Miles

I've run my Wadkin AGS on a Transwave static converter for years. It works well but you certainly can't achieve the rated motor power with it... I used to have a BAO thicknesser in my first workshop, where I had a 415V supply to run it on. I wouldn't want less power than that. Continuously...

No, unfortunately, they don't. Drives Direct do a 3Hp 240V in 415V out (modded, as you say) but that wouldn't be be big enough to run both motors. AFAIK, the only larger ones are in their "advanced" range and prohibitively expensive....

Invertek have quite a good range. They do a 4kW model with single phase input.... https://www.motorcontrolwarehouse.co.uk ... 0.html?p=2

Thanks. That's interesting to know. If one could retain the 2 speed switching, it would be a solution but I'm not sure you save that much money by using a single inverter over separate ones.

Drives Direct do a 2 stage inverter that outputs 415V 3phase from 240V single phase input: http://www.drivesdirect.co.uk/Products/ ... 40_415.htm Twice the cost, too.....

Thanks. That's certainly worth considering. Might even get an exact match with secondhand motors.... Single phase BAO/Ss do come up occasionally too but, as you say, usually at a premium. I'd be stuck with a single feed speed too...

I fear you're right about that. My Wadkin AGS sawbench, circa 1978, has a 415V motor with no way of reconfiguring to Delta in the terminal box... I'm running it on a static converter. On the other hand, I came across a photo of a motor on a BAO in Canada that seems to be dual voltage. Export...

Yes, I'll definitely need two inverters! :) Hopefully, both 240v output or it will be an expensive exercise.......

So, for the high speed, the phases are connected in Delta configuration. If I just retained this connection and used a 240v output inverter, I would get a base speed close to the original lower feed speed (4.5m/min.)