By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for Brian Sweeting

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

Thread: induma milling machine
17/12/2017 17:24:21

Link here is from another forum regarding a French site, Google translate does the rest.

http://www.cambouis.com/bloc-notes/2009/01/19/2009-01-19.htm

Edited By Brian Sweeting on 17/12/2017 17:24:55

Thread: Lathe vibrations
16/12/2017 23:58:45

Just keep an eye on the motor temperature when running at reduced speeds, the 1.5hp one that is.

16/12/2017 22:32:35

Whilst appreciating the potential electrical hiccups is there any mileage in there being a problem with the bearings?

I know that you have checked the balance of the rotor and pulley but this was outside of the motor frame.

Are the bearings tight and square on the shaft?

Are they a good fit in the motor casing itself? Did the casing go back together in proper alignment?

Just clutching at straws here.

Thread: Titanium properties
14/12/2017 13:39:25

Looking at images of the nickel titanium tools they appear to be cut on opposite sides rather like collets thereby allowing some extra flexibility.

Thread: New compressor required
11/12/2017 18:06:41

The silent compressors are generally hermetic refrigeration compressors.

The reason for the reduced duty cycle is that the motor does not have cooling refrigerant running through it only air.

In normal "fridge" usage the compressors often have a maximum start regime of six ( sometimes 10 ), starts per hour. When the motor starts there is an inrush of energy which generates heat in the windings, the motor then needs to run for a reasonable period the get rid of the heat. When running on air only the motor cooling is minimal.

Also, as an air compressor any oil carry over in the discharge pipework needs to be mechanically caught and returned to the compressor or at least the level monitored so that it can be topped up. In a fridge the oil circulates with the refrigerant and finds its own way back.

Thread: Lathe vibrations
11/12/2017 17:53:27

Most VFD manufacturers will confirm that changing the switching frequency upwards can reduce the perceived noise.

It is possible to overdo it so I would suggest that you read up on your particular make/model.

Thread: Lathe start-up speed best practice.
08/12/2017 14:38:31
Posted by Martin Evans 6 on 08/12/2017 11:58:21:

Good morning all.

There's no mention of the best way to start up my machine in the Warco WM180 Operator's Handbook unless I'm selectively blind, but it's clear that ramp up/ramp down is the method preferred by the majority and the one least likely to cause undue wear and stress, as well as giving lubrication a chance to spread around, so that's what I'm going to do.

 

Thanks all for your advice and opinions.

 

Martin.

The manual I found made for a dodgy startup in my mind so had kept quiet.

1 Switch on

2 Select forward or reverse

3 Adjust speed.

Would have preferred number 2 to have been first but......?

Brian

Edited By Brian Sweeting on 08/12/2017 14:39:09

Thread: What colour is 'Cherry Red'?
06/12/2017 19:39:27

Found this list with some colours shown...

**LINK**

I did see on one site four different temperatures of "red" as in seen in the dark, twilight, daylight etc.

 

Edited By Brian Sweeting on 06/12/2017 19:40:07

Thread: Are the Electrics Right in ME4575?
05/12/2017 13:55:09
Posted by Brian G on 05/12/2017 08:45:28:
Posted by Brian Sweeting on 04/12/2017 22:21:22:

Looking at Fig 2 in the original post I would consider it dangerous because even in the 'off' position there is still the potential for a voltage to reach the motor.

Although the neutral should be at 0 volts a fault upstream would feed through the relay coil to the live feed to the motor or your fingers if you are during some wiring mods at the time.

Isn't that what the isolator is for? I wouldn't like to work on anything only separated from the mains by a contactor - if the neutral breaks correctly but the live contacts have welded, the motor would be live even though it had stopped. (Although this wouldn't happen in Fig.2 as the contactor is fed from the live contacts, so if the live contacts had welded the motor would re-start immediately the N/C button was released.)

Brian

Agreed that the isolator should be used, perhaps my wording was unclear. In fig 2 the machine is not separated from the incoming neutral in the off state. 

Any neutral fault upstream could be fed to the machine, unlikely, sure.

Thread: Elliot 10 inch shaper motor pulley
05/12/2017 13:40:20

Came across a user manual but apart from seeing that it is a vee belt no sizes.

**LINK**

Thread: Are the Electrics Right in ME4575?
04/12/2017 22:21:22

Looking at Fig 2 in the original post I would consider it dangerous because even in the 'off' position there is still the potential for a voltage to reach the motor.

Although the neutral should be at 0 volts a fault upstream would feed through the relay coil to the live feed to the motor or your fingers if you are during some wiring mods at the time.

Thread: SMALL RADIUS BENDS IN COPPER TUBE
04/12/2017 15:28:34
Posted by duncan webster on 04/12/2017 14:36:57:

6mm end feed elbows are listed at

**LINK**

you could ring the manufacturer and ask where to buy, or even scrounge some

Plumbers merchants should have those

Edited By Brian Sweeting on 04/12/2017 15:29:38

03/12/2017 00:13:01

One suggestion I've seen is to crimp one end and then fill the tube with a low temperature filler such as cerro alloy or even plumbers solder.

Form your bend and then melt the filler out of the tube.

Thread: Anti-corrosion
02/12/2017 19:56:56

There is a product called ACF50 which was designed for corrosion proofing aircraft. It is also well used by motorcyclists to protect their machines.

It isn't cheap but does what is says on the tin. A small squirt goes a long way.

http://www.acf-50.co.uk

Edited By Brian Sweeting on 02/12/2017 19:58:18

Thread: Planned debris recovery satellite
30/11/2017 23:44:58

Aren't most of the bits all travelling at the same speed, at their particular altitude, otherwise they would fall out of orbit.

If that's right then they will only impact something in a lower orbit when they themselves start decaying.

My head's beginning to hurt now. frown

Thread: Emergency Stop on Super 7 Industrial stand
30/11/2017 23:37:56

You can wire up more than one switch if you want to.

Personally I would fit a contactor in a box with the knock off button(s) wired through the contactor coil circuit. The lathe, or workshop, power supply going through the contactor.

Edited By Brian Sweeting on 30/11/2017 23:38:58

Thread: TV tonight
30/11/2017 16:01:27

Thanks for that info SOD, I'll need to update an old lady friends' TV for her, being partially sighted she can't do a lot about freeview updates herself.

Thread: Macc Models
30/11/2017 15:51:25

Their website has "closed 24th November" on it, whether that means for just a day or maybe a week I don't know.

Thread: Power hack saw motor switch
30/11/2017 15:37:15

Sadly that push button contactor is not designed to have remote stop/start control.

If you can find a way to get at the wiring to the buttons you may have a chance.

You shouldn't really wire one phase through the limit switch as the switch probably is not designed to take the current through its contacts.

Thread: Union T&C grinder Wiring
30/11/2017 15:21:47

Checking with Google brought up a 2010 thread from here, diagrams included....

 

http://www.model-engineer.co.uk/forums/postings.asp?th=43963

Edited By Brian Sweeting on 30/11/2017 15:22:55

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Latest Forum Posts
Support Our Partners
cowells
Warco
Eccentric July 5 2018
emcomachinetools
ChesterUK
Allendale Electronics
Eccentric Engineering
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest