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Member postings for Martin W

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

Thread: Kindness to Brush Motor Control Board
05/01/2022 11:16:01

While this doesn't help the OP with his question regarding start up procedures for his lathe. The Chester DB7V that I have has a built in soft start and to date I have had no problem with the electronics even though I rarely set the speed to minimum prior to starting unless I require a high speed setting. The lathe must be over 10 years old now and hasn't missed a beat in that time, famous last words!!

As I said this doesn't help the OP but I believe that this illustrates the benefit of soft start procedures be they implemented either electronically or manually so if you are unsure whether your system has a soft start built in then starting at the minimum speed and ramping up to the required operating speed will do the electronics no harm and could well extend their life.

Thread: Mamod Locomotive Rebuild
20/12/2021 11:34:00

Just had a Google search and it would appear that Mamod is still going strong, see here, but they are not cheap to buy

Martin

Edited By Martin W on 20/12/2021 11:35:18

Thread: Another workholding problem
19/12/2021 12:16:17

Any merit in gluing it to a sacrificial substrate, mounting substrate on the faceplate, center workpiece and level, turn the profile you want and then remove finished article from the substrate. This process has been discussed on this forum more than once I believe.

HTH

Martin

Thread: Volkswagen
30/11/2021 00:32:54

No doubt they will come up with pink electricity to ensure that you are not using the domestic stuff and avoiding paying the appropriate tax. wink

Edited By Martin W on 30/11/2021 00:33:52

Thread: Buying stock?
20/11/2021 13:47:27

I wouldn't recommend going to a scrap yard and buying lumps of metal as you will have no idea of the specification for that material. It could be anything from soft and gummy to hardened metal, if the former then it will likely tear rather than cut which can give a really rough finish and if hardened then getting it to cut may well be difficult.

This could well lead to you chasing problems that are nothing to do with your kit or abilities. How do I know? from experience of course. A classic example was some cheap aluminium offcuts I bought as they appeared to be a bargain. Some was OK but the rest was so soft that a standard well sharpened tool just seemed to smudge the surface and left a chronically poor cut. Changed to a known piece T6/6082 and instantly got a mirror finish with the same tool and settings. I have also had problems with steel of unknown specification, this turned well and the finish was pretty good but when looked at the next morning had bent like a banana as the stresses relieved.

Buy your metals from a recognised company who give the specification of the material being supplied. Yes it may be marginally more expensive but will save you time, heartache and could well wind up cheaper in the long run. Once you know what you want to do then you can reduce shipping costs by combining your order with a supplier.

I know this isn't answering the main questions in your opening post but it could well stop you becoming frustrated and disheartened re the hobby.

For starting I would recommend a steel such as EN1a (old specification but still frequently used) or equivalent and an aluminium alloy like T6/6082 using sharp HSS cutters and mills.

HTH

Martin W

Thread: Merryweather Fire King
18/11/2021 00:13:21

That all looks brilliant, I envy people that can produce results like that. Keep posting your progress and like Werner's I really enjoy seeing projects like this coming to fruition.

Martin W

Thread: Another chinese lathe rises through the smoke
15/11/2021 10:29:56

Anthony

Have you ever inspected the brush gear on the motor for wear or carbon dust build up? It could be that the brushes need replacing or it just needs a good clean out. After 13 years use, depending how hard/frequently its been used, it would benefit from a service.

 

 

 

Edit. Moving a comma

Edited By Martin W on 15/11/2021 10:31:21

Thread: Hermes. A Company in Total Confusion!
12/10/2021 18:06:21

Ordered some bits and pieces from China, not engineering related. The company supplied a tracking number and using this I was able to see the progress of this order across China, transit to the UK and arrival at the Slough depot of the shipping company where it was scheduled to be picked up for delivery by Hermes once it had cleared customs etc. The day after clearance I received an email from Hermes stating it was going to delivered the next day between 10:00 and 11:00. GUESS WHAT the door bell rang at about 10:20 and the Hermes man was there ready to hand me my parcel and take the now obligatory picture. Problems none, service spot on, well done Hermes in this case. No vested interests in this or any other courier company, Just a satisfied customer, but waiting for the cock up to strike.

Martin

12/10/2021 00:14:07

Alistair

There are a couple of PMs for you.

Martin

06/10/2021 00:13:18

Alistair

I have sent you a PM

Martin

05/10/2021 16:15:40

This was covered in the latest 'Consumeractive' section of Computer Active wasn't it. I thought that they were chasing this up for you to see if they can persuade or prod Hermes into action and get some resolution to the problem. That said to date I haven't had a problem with Hermes so consider myself somewhat fortunate but as per the norm for any company problems are highlighted but good/adequate service slips by unnoticed.

That said it is always worth knowing when these incidents happen as it can give an indication of the relative merits of any service, but as always it is the companies offering the cheapest service that seem to be more susceptible to making a pigs ear of things. Yet we continue to use these services and hope for the best, it would be interesting to know what percentage of their trade has had a problem and compare that to other couriers performance figures including successful resolutions.

I have no vested interests in Hermes and have to date not had a problem, keeping fingers firmly crossed as I am expecting some deliveries soon.

Hope you get it sorted to your satisfaction soon and as you say 'It's your £20'.

Martin

Thread: Maplin Weather Station Repairs
30/09/2021 13:23:39

Greensands

You say that if you move the base station close to the transmitter unit you can establish communication between the units but when running at a distance readings become erratic and eventually fail. Is there any possibility of moving the base station closer to the transmitter to see if this helps to relieve the problem in the longer term. If it does then this indicates that there is a communication problem between the units. This could be caused by the transmitter losing power or more probably from some sort of signal interference from another source. Have you changed/added anything electrical/electronic in the vicinity of the base station, changing lighting from a tungsten bulb to a LED/ energy saving bulb, different TV controller as some now work on RF rather than IR. There are quite a few items that run in the same 433MHz band that could affect the communication between the units. Another avenue that may be worth looking at is has there been any changes to the physical environment in the vicinity of the units.

Just a few thoughts that might help shed some light on the problem.

Martin

Edited By Martin W on 30/09/2021 13:26:45

30/09/2021 12:46:00

As John asks what is the fault with the weather station. Is it a single channel failure e.g. wind speed/direction, humidity, temperature or a complete failure of all of these inputs.

If the display module appears to be working but not receiving any data then the fault could be either this unit or the transmitter module mounted in the cylindrical screen however if the base station is displaying sensible readings for one or more channels then the communication between the transmitter module and base station looks OK.

A quick check list below might help identify the problem.

a) Windspeed and Direction: Check: sensor - cabling- connectors of failing channel.

b) Temperature and Humidity: Fault on the transmitter module, unit as per you picture.

Without further information it is impossible to proceed any further or offer any sensible help.

Martin

Edit:  Posts crossed so ignore above if not relevant.

Edited By Martin W on 30/09/2021 12:48:08

EDIT The Amazon seller I referred to still claims to be stocking replacement modules, however although they look identical there may be a compatibility issue.

Edited By Martin W on 30/09/2021 12:53:53

28/09/2021 11:17:37

Had a quick trawl on the internet and came up with this which if it works could well prove cheaper than trying to get the existing unit repaired.

Martin

edit: Spelling error

Edited By Martin W on 28/09/2021 11:24:51

Thread: Post Office Deliveries
16/09/2021 12:50:25

We have not had any problems/delays with deliveries of letters and parcels in the Reading area of Berkshire. I have never had problems with small/medium parcels on their 48hr tracked service which I think is excellent value for money, now they will collect from your door for a small fee. For large/small letters and small/medium parcels I wouldn't consider going anywhere else. That said the local DO is close and convenient.

MartinW

Thread: Anyone know what machine tool maker uses this emblem?
31/08/2021 11:43:59

Had a look in lathes.co.uk and while there were several manufacturers with the initials JW or WJ I could not find one with this logo/emblem.

Martin W

Thread: Something to spend your pocket money on
28/08/2021 00:08:52

I always find collections at auctions a somewhat bitter/sweet affair. It invariably means that someone with a passion and/or skill has passed on and what they have made/collected is being split up, hopefully to buyers who really appreciate how much effort and skill that went into assembling that collection in the first place.

That said there are some superb models there which deserve to go to a good home.

Thanks for the pointer Jason

Martin W

Thread: A SIMPLE POINT !
27/08/2021 13:56:04

Only if they were being fitted by the company drip smile p.

Thread: Age and Realisation
24/08/2021 00:37:10

I would love to take something like that on, however I know that I have neither the skills nor the staying power to complete it and as I am in my late 70's probably would be pushed for time.frown

I hope that both projects find a good home and get completed with the same level of skill you have shown in all the engines etc. you have shown in threads on this site.

Martin W

Thread: Faulty Sieg C0 Lathe
23/08/2021 00:31:56

Paul

If you do want to pursue the restoration of this lathe then you can quickly check the speed control board by replacing the motor with a 80-100W filament bulb and varying the speed control pot. If the intensity of the bulb varies uniformly from dim/off to full brightness with the adjustment of the speed control pot then there is a fair chance that the speed control board is OK. Depending on how badly bent the lead screw and cross slide screws are bent there is a good chance that they could, with care, be straightened enough to check basic operations. What could be a problem is damage to the head, chuck spindle, chuck and head bearings though bearings are relatively cheap and can be replaced. The original sheet metal work can either be hammered into submission/shape or bits fabricated and bolted/pop rivetted in place.

If you do take it on as a project then good luck and I hope you get a working lathe.

Martin

ps:

The motor can be checked by connecting it to a low voltage DC supply, 12/24V, and if it spins up and rotates freely and evenly in both directions then it is likely to be OK

Edited By Martin W on 23/08/2021 00:35:51

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