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Member postings for Cornish Jack

Here is a list of all the postings Cornish Jack has made in our forums. Click on a thread name to jump to the thread.

Thread: Getting an ML7
12/08/2020 13:36:25

For either short, or longer, term reference, it's worth considering re-motoring and installing a VFD. Even on my TriLeva the difference is worthwhile. My installation forced the removal of the drive belt guard but other ML's may not need it.

rgds

Bill

Thread: Door stay help
10/08/2020 17:35:54

Sam has it - we have two fitted to our french windows and they JUST WORK, - and have done untended for 6 years so far. Have just ordered another for the scullery door. Available in 8" and 12". We use the 12" to cope with the outside step.

rgds

Bill

Thread: Namibian Dust Storms
09/08/2020 17:23:18

Hi Joe, thank you - now I get it! I was going to say " lucky bugger", but it's not luck - good decisions and knowing where you're going and the rest follows.

Clogs - Not sure if the 'cupboard' you're referring to is what my SWMBO refers to as a 'Schrank' (sp?) in German - it sounds similar.

rgds

Bill

09/08/2020 09:38:01

Those statistics are difficult to translate into day-to-day living. The satellite images show a land offering no more welcoming than Mars. Having experienced three dust storms in Aden, which lasted a maximum of 6 or seven hours, the thought of your experience leaves me aghast. How can you survive with the taped-up doors, etc.?

To exist in such a malevolent environment and design and produce the extraordinary range of tools and devices which you delight us with, is beyond amazing! Beyond inspiring ... thank you!

rgds

Bill

Edited By Cornish Jack on 09/08/2020 09:38:51

Thread: Training school auction
06/08/2020 17:45:27

S.O.D's view is, unfortunately correct - not because there is no requirement for engineering skills, but because, as a nation, we prize money-making in the here and now over investment in long-term projects. It's the mentality which left the motor industry and similar hanging onto obsolete machine tools 'cos it was cheaper, rather than invest in up-to-date technology. We leave foresight to others and wonder why we end up in a mess.

rgds

ill

Thread: cutting upholstery foam
31/07/2020 18:45:43

Definitely NOT hot wire! One of the reciprocating blade electric carving knives will do the job (carefully!). Ideal woukd be a long blade razor sharp sword,

rgds

Bill

Thread: Dodgy Lathe on Ebay
27/07/2020 09:41:02

One worry with Ebay, for me, is that featured in the present Unimat 3 'bundle on offer. All bids are "private listing - bidder identity protected" - why? I would never bid on any such item as it smacks of something 'iffy'. What are the advantages of such restrictions?

rgds

Bill

23/07/2020 21:16:03

A bit concerning that one of the responses above suggests sellers bidding up their sale item is acceptable - IT IS NOT! It is referred to as 'shill bidding' and is (for obvious reasons) illegal. I've only come across it once (provably) and took action with Ebay. It (Ebay) is a useful function but a natural hunting ground for the rip-off merchants!

rgds

Bill

Thread: Using Counterbores
23/07/2020 14:02:22

Thank you for the replies. I quite see that they would appear to be reverse counterbores, but how do they operate without a drawbar fitting or provision for a centre to apply pressure ? Additionally, there is no adjustment for length. The design appears to be specific to one particular operation but what it was, I have no idea!

rgds

Bill

22/07/2020 11:55:21

Possibly OT but a repeat of a query I posted some time back without a real answer. The photo shows a pair of tools which appear to have a counterbore function but the construction seems at odds with normal counterbore - they appear to operate as 'pull' tools rather than 'push'. The shanks are 2MT without drawbars and the 'bottom end' has a hole but not suitable for centres. These features would seem to indicate that the cutters (only mountable to face the shank) cannot apply pressure for the cut. The cutters are special to type, quality material, and come in a range of sizes.

Does anybody recognise what they are, please?

wotsit1.jpg

rgds

Bill

Thread: DC motor reversing
18/07/2020 19:10:02

Just to tidy this one up - George and S O D plus Bruce earlier got it right. I dug out another 12v source and tried it ... and Bingo!. Works fine in both directions. It was originally powering the lift arm taking full body weight, so, even at 12volts it should provide useful lift. Thanks again to everyone for advice and pointers.

rgds

Bill

18/07/2020 10:22:04

Thank you to all replies. Much there to check and try. The original (an Oxford Standaid) was operated via a pendant control and powered from a rechargeable battery. The point made about 'fail-safes' certainly needs checking.

rgds

Bill

17/07/2020 20:53:13

Brian and John, thank you.

The column does extend/retract mechanically on the screwed drive shaft when it's rotated by hand. I'm assuming that if I can get the motor to reverse and install a chonge over switch,, it will offer two-way movement.

rgds

Bill

17/07/2020 18:27:21

The photos below show a 'recovered' part of an invalid mobility lift which I was hoping to adapt as a power lift for the mill or similar. It is intended to operate on 24v DC and I have tried it successfully on a 12v power supply - but only in one direction. Reversing the live and neutral inputs just produces a low 'buzz' with no movement. Any pointers to how to connect it for selectable rotation, please?

TIA

img_0144a.jpg

img_0146a.jpg

rgds

Bill

Thread: Jig for hand tapping
17/07/2020 18:17:52

A hazardous venture into the workshop undergrowth eventually found the hand tapper. It seems to be made by 'ROFMILL' and the photos below showit with the drill chuck key fitted in the tap holder. The handle is adjustable for swing.img_0142a.jpg

img_0143a.jpg

rgds

Bill

17/07/2020 14:03:11

Several years ago I bought a dedicated cast iron tapping jig. I'll try to find it and take a photo. It has never been used for its proper purpose.

rgds

Bill

Thread: optivisor
10/07/2020 12:23:48

Some of us may recollect a (Panorama?) TV programme coverfing the 'rip-off' operations of Britain's spectacle industry before they became 'optometrists' It was a total racket!. The mark-ups on standard reading glasses were ridiculous and 'specials' were beyond belief. A specialist eye surgeon from Moorfields was asked where he bought his glasses - " Morocco (or similar) at £1.85" One pays one's money and makes one's choices. My only prescription glasses were produced after 3 attempts by an R.A.F. employed, Harley Street 'specialist', the final pair of 'half-eyes' being made up to a 'prescription', copied from my Hong Kong sourced similar, which cost £1.30. That was 35 years ago, so I suppose another visit might be worth considering.

Thread: ML7 refurbishment
07/07/2020 09:30:50

Nick Clarke 3 - in your last, you noted that the TriLeva 7 was recommended for 3/4 HP. I have such a machine but I haven't seen that previously. Could you say what the source is, please? (and does it say why?)

rgds

Bill

Thread: Lockdown Reading - Nevil Shute Rediscovered
05/07/2020 17:11:50

Cardington rings two bells for me - Joined the RAF there in '53 and spent a day at a RAFMAA Indoor model meet in the 80s. Everything very impressive ... impressively awful in the '50s and impressive for hangar size and model quality in the '80s.

rgds

Bill

Thread: We need Pi
05/07/2020 11:37:38

"elegant simplicity"

Umm ... yes, indeed! However given the 'ad infinitum' nature of pi calculations. anything beyond 22/7 makes my head hurt and my eyeballs fall out!!sad

rgds

Bill

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