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: 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 |
|
Thread: Hot rail tracks |
26/06/2018 14:43:00 |
There was a photo of some buckled track near Glasgow in various papers... |
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. |
Thread: Workshop Build - Floor height |
04/06/2018 21:54:13 |
I'm not an expert but as it's timber have the concrete rising above the surrounding area to prevent water pooling around the base timbers. Too, have the floor joists at the standard building 16" centres, check your tape measure and you will see a mark every 16". This will make finding them easier later on if you want to screw something down. |
Thread: three phase to single phase motor swap |
01/06/2018 13:34:43 |
Looking at lathes.co.uk it seems the M300 did also come with a 230v single phase 1.1kW motor but due to the lower power the usable speeds drop by 50%. |
Thread: small cast iron flywheel |
31/05/2018 23:48:25 |
Probably not ideal but have you looked at cast iron casters? An sample here on eBay |
Thread: Help please Machinery ID |
26/05/2018 18:52:50 |
We're typing too fast for each other I think. |
26/05/2018 18:50:32 |
Sorry Paul, no photo visible. (Edit - photos just showed up so please ignore this post.) Edited By Brian Sweeting on 26/05/2018 18:51:48 |
Thread: What's the best alternative to 'loctited' |
22/05/2018 15:37:00 |
Just been having a quick look around the Loctite website and came across the term "retain". Their retaining compounds seem to cover usage from loose to interference fits. I think retain is a good choice because it doesn't imply a non-failing joint that words such secured can do. |
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