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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: Digital RPM Display Problem
16/07/2018 14:55:37

What the gap between the magnet and the sensor?

Could be a faulty sensor. Does the sensor led flicker when the magnet passes it?

Thread: Is this really a clock?
12/07/2018 23:36:32

The guy just didn't know when to stop cutting gears.

Thread: another mystery object
12/07/2018 15:40:22

Looks like a type J.

Wire colours - **LINK**

Thread: Age related macular degeneration.
11/07/2018 16:05:35

Is your condition 'dry' or 'wet' as a friend of ours has wet and any info is useful.?

Thread: Work bench to mount lathe
10/07/2018 22:16:59

I have to admit that my mini-lathe is mounted higher than my suggested elbow height to save me bending over the workpiece so much.

10/07/2018 11:06:32

Some people say that with your elbow at 90° your hand should fall onto the cross slide operating handle.

Also consider how bent your back may be when watching the work piece and turning the controls.

Thread: fire warning
08/07/2018 17:45:39

Lucky escape indeed.

Other fire creators can be magnifying mirrors and bullseye glass windows.

Thread: tachometer wiring
03/07/2018 14:49:02
Posted by JIm Powney on 03/07/2018 11:01:02:

Gents

I have the same Chinese tacho with a hall sensor as the first post

We have a Large Mixer that we want to display the RPM for operatives

I Have wired as above diagram from a permanently fed 24vdc supply within the mixer and also tried the Blue sensor wire to either terminal 2 or 3 (0Vdc and Scn earth) and works the the same on both (as proposed in the below link) with Terminal 4 unused

https://www.model-engineer.co.uk/forums/postings.asp?th=112167

We have also tried teh Black sensor wire to all pins including swapping teh Black/Blue cables to see if that made any difference but seems to function

However, we get 0000 displayed on tacho and red LED on back of hall sensor - as expected with voltage applied and Shaft NOT TURNING

regardless of how we wire the combinatoin of VDC/Tacho/Sensor when we start the shaft rotation the tacho shows 4 dashes "- - - - " and does not change even though the sensor seems to react to the magnet when the shaft is NOT spining

Does this sound like a faulty Hall sensor or some kind of voltage interference from the mixer itself?

the 24vdc comes form terminals connected directly to a 24vdc rectifier which is fed from a 220/24vac transformer

Do I really need a dedicated DC Voltage supply?

Any help appreciated

Jim

Turn the magnet around, north to south poles or the other way, this caught me out when I installed mine last year.

Thread: Silver soldering problem
02/07/2018 12:00:58

You say that you melted the end of the job.

If you overheat the base then the filler will simply run off, the flux has already benn burnt away.

Thread: Wobbler No.2
02/07/2018 00:10:23

Looks good, well done.

Thread: Am I getting an irritable old git?
01/07/2018 18:44:39

I think that at our age(s) we should be allowed to be an old git if we so wish.

At 70 I feel that if we fail to correct these errors then the youth of today and tomorrow will miss out on the joy of language.

I've recently acquired a new fountain pen and now enjoy, once again, writing letters to friends and family using writing paper and envelopes. I think that they are appreciated by the recipients too.

Brian

Thread: How would you get this apart?
30/06/2018 13:44:42

If you plan to modify it why not make what you want or do you only have a wood lathe?

Thread: removing speed control
29/06/2018 22:07:03

Shaking itself to death is a known effect of running these models according to lots of various forums; speed control probably fine.

Thread: Act Quick, England Tickets
28/06/2018 14:44:33


This may be of interest to someone. A friend of mine has 2 tickets in a corporate box for the next England v Belgium game Thur 28th June. He paid £300 each including flights but he didn't realise when he bought them months ago that it was going to be the same day as his wedding!

If you are interested, he is looking for someone to take his place.

It's at the Portsmouth Road Registry Office, at 4pm. The bride's name is Nicola. She is 5'4" tall, about 8 stone, quite pretty, has her own income and is a really good cook. Pm for more details.

Thread: Hot rail tracks
26/06/2018 14:43:00

There was a photo of some buckled track near Glasgow in various papers...

img_20180626_143848_619.jpg

Thread: Electric motor reassembly
15/06/2018 16:55:14

Preloading the bearings perhaps?

Thread: signal box bell codes
13/06/2018 00:09:09

I'm no expert but I believe it depends of the possible length of clear line available for safety spacings.

Does info here help at all? https://signalbox.org/block/absolute03.htm

https://signalbox.org/block/absolute03.htm

Edited By Brian Sweeting on 13/06/2018 00:09:38

Thread: Governor pulley belt
12/06/2018 20:03:04

Yes, the governor pulley is too high, the belt is wasting energy trying to force the pulley downwards to level the drive line.

If the pulley cannot be lowered then consider making some idler pulleys to raise the drive line.

Thread: New shed- bedding material
12/06/2018 15:31:52

Are you wanting something to support the shed when it is position or just something to fill in any gaps that there may be between the shed frame and the slabs?

How firmly fixed are the slabs?

Edited By Brian Sweeting on 12/06/2018 15:32:31

Thread: Motor wiring
05/06/2018 13:18:10

The diagram from the motor cover gives you the wire positions as far as I can see.

Red, black, yellow and the cap.

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