Member postings for Johnboy25

Morning folks.... while we’re on the subject of Boxford lathes - has anybody dimensional drawings of a splashback for the lathe? I could makeup a simple one but I sure it would be usefull with a shelf option for the Dixon QCT holders. The retired edges will make it sturdier as well.

John

IKB - that’s interesting... that’s a good point that you’ve raised. I can see the reasoning behind your thoughts/experience. I’ve never had to ‘play’ about with torque setting in the applications I’ve had experience with but well worth committing to memory..

John

A lot of the comments and suggestions have been made on this already but has the VFD got an Autotune function? I use makes like Parker SSD, ABB Drives, Telemecanique & Mitsubishi types on my machines. These are usually aquired off eBay. As paying full price it a bit costly to say the least! 😳

John

Graham... while working at Sperry Gyroscope, Bracknell I was very close to the mechanical development. The oil was quite a topic of its own but from memory it was pretty thin stuff. I would suggest the nearest easily obtainable oil would a light grade of clock oil.

John

I can confirm that one Norman! The other problem I have is putting thing down in my clutter of ‘stuff’ then not being able to find for quite sometime like a a few days or so!😳 or maybe the get whisked off to,that parallel universe  for a while!🤔 John.

P.S. dyslexia doesn’t help - just makes with more editing!!!

Edited By JasonB on 12/12/2017 20:18:29

A cold afternoon in the workshop - +1° C inside when I went out. Decided to put a little heat on with a single radiant bar heater which raised the temp to +5° by time I had had enough! Managed to get a left handed thread put on a shaft for a potters wheel build for a neighbour. All turned out nicely - if you pardon the pun! Seasonal greeting and wrap up warm if your escaping to the workshop! John

Edited By Johnboy25 on 12/12/2017 19:07:01

Bazle... I agree - I remember my father slitting the chestnuts then roasting them on the coal shovel in the fire! As I don’t have an open fire in my house I slit the nuts and microwave full power for about a minute. It doesn’t have the aroma of roasting on the fire but a good way to ease into the festive spirit!

John

How about Mapp gas? **LINK** if you want a higher temperature without using oxygen. This is easily obtainable in plumbers merchants in the yellow canister. John

I’m generally slow in producing anything mainly I believe it’s due to most of my maching either lathe or milling work is self taught as I’ve been in the electronic and electrical profession all my working life, (now retired! 😋) But I do find my jobs always take longer when my friends or neighbors pop in to see if I could do this ‘five minute’ job for them or have I got a ‘one of these’ as theirs too short, too long or it’s just broken!🤔

Edited By Johnboy25 on 11/11/2017 20:16:19

Speaking of DRO's - after acquiring my Bridgeport three years ago, I've finally got round to fitting a DRO! I've got the X axis fitted ok without too much head scratching on the back of the table out of the way of heavy vices and rotary tables and the like. Now determining the best way to instal the Y axis. I've the provision to put a Z axis later. So far so good. Looking forward to working more productively.

I suggest you just treat it as a two pole motor connected in delta (also referred to as mesh) then use a VFD inverter. That will give you a max motor speed of 1420 rpm.

John

Edited By Johnboy25 on 25/09/2016 20:49:08

I always buy branded bearings but I wouldn't know a counterfeit from a proprietary brand even after I took it out of the packaging unless is was that obvious. I once got caught buying a 'RHP' bearing for a Lister D rebuild - insisted on a branded product and paid the RHP price only to find it was supplied in a plain white cardboard box with a Dymo tape type lable with RHP on it! It did have RHP etched onto the race but I couldn't determine if it was genuine. Needless to say I didn't use it and I should have sent it back. I haven't been back to buy anything else from the supplier. Something about a fool and his money springs to mind - But I keep it as a reminder. 😳

I agree with John... If it's not something caught in the belt or the belt perished and its coming from the motor it could be some sort of centrifugal switch mechanism trying to re-engage on run down. Just a thought 🤔

Edited By Johnboy25 on 17/08/2016 09:28:42

Rod.

I've saved that link for a rainy days surfing the web.👍

Thanks

I agree with Tim - they look like they can be ground into special size counterbores. I remember I found an odd size years ago - I had the tool room grind the pilot to a useful size. I've still got it in the arsenal.

John

Just a thought...

I bought a Henry vacuum cleaner at an auction with the same fault many years ago...

If it powers up when you wriggle the power cable - remove plug from supply and cut back say about 6" from the cable from the entry point. Remake the electrical connections inside the Vax. (It could be either the Vax end or plug end - replace moulded plug with an MK tough plug).

I've seen this manytimes in the past where the flexing of the cable breaks the conductor inside the insulation causing an intermittent fault. I experienced this on automotive sensors as well.

I have a name for this - I call it a 'rubber' joint!

Failing that diagnosis - check out the bushes. If they've warn down the retaining spring may have bottom out not providing contact pressure on the commutator.

John

For my six penny worth - I've recently heard first hand that Windows 10 was to rolled out on a multinational companies system but the IT guys found so many security problems due to all and sundary could have access to files etc. A corporate modification is underway to make it more secure.

On that basis I won't be upgrading for sometime. Just like when XP was first released. I still think XP professional take some beating.

John

John Curruthers - I've a few projects like that! But 10 out 10 for tenacity!

I've now got a good line for these PC scammers after hearing a friend use this tactic - she asked the scammer if his mother knew what he did for a living! She then entered into a conversation asking why could he put his computer knowledge to a better use to earn him an honest living. It was fun listening to! Now I adopt the same line. After a while they hang up. I'd like to think it may stimulates some thought in the scammers conscience!

I believe there are a new design Wago type that allow you to insert and press a button, for a better word, to release the wire. I seen similar on other electrical equipment like inverters.

J.