Here is a list of all the postings Robert Atkinson 2 has made in our forums. Click on a thread name to jump to the thread.
|Thread: Metrotropolitan Vicker Single phase motor|
OK, A picture is worth a thousand words.
Crossed posts with Martin.
I don't think the 3 phase type slipring system will work with single phase and John says no stator windings.
Hmm, Any photos? How big is it?
If it is slip-rings rather than a segmented commutator it must be some kind of "Inverted" induction motor. Trouble is I can't see why you would do that or how it is started. Are you sure it is a motor? It could be some kind of permanaent magnet AC generator.
There are 3 phase motors with wound rotors and slip-rings. These have power connected to the stator windings and variable resistors (rheostats) connected to the rotor to control torque and (to a lesser extent) speed.
|Thread: EVs and the heater on a cold morning !|
PGK PGK hints at another issue, you can't charge the battery when it's very cold. They have to use mains power to warm up the "coolant" and cells before charging can start. Not too much of an issue in the UK or if charging straight after a run but is an issue in colder climates when using off-peak or sequenced charging.
|Thread: How much is a life worth|
This is typcal lawmaking just to make it easier to get a conviction and look like the politicians are doing something. There are existing laws coving being in control of a vehicle. These have been used long before cellphones to proscecute mobile radio users. The original cellphone law draft covered all types of hand held radio use. Then they realised that this would affect the emergency services so it was made specfic to cellphones. I reserve further comment until the changes are made law.
|Thread: Buying a Tachometer - Which type Contact or non contact ?|
You can get the best of both worlds with non-contact tachometer and a contact adaptor. This is just a spindle with target a that fits on the tachometer. The main use is with a wheel for surface speed measurement.
DIY is possible too. You can buy the difficult bits
|Thread: Decent hacksaw blades|
+1 for Starrett
|Thread: Enclosure for Inverter|
Someting from this range or similar is ideal
Sometimes you can pick up a used one (with bonus par inside sometimes) on ebay wth creative search.
Follow the inverter manual for minium space required around the inverter. Don't forget strain releif glands for the cables.
None of the typical inverter drives are suitable for mounting without an enclosure in an accessible or exposed location. They do not have proper environmental protection, touch protection for terminals or strain reilef for the cables.
|Thread: Music on TV Programmes.|
On The licence thing, many years ago I was in a rented aparment and had no TV. TVL came round asking the usual questions saying I didn't have a TV licence.
|Thread: Treadle Lathe- ID Please?|
As it has back gear and the leadscrew in front of the bed it looks like a SuperRelm
|Thread: SMR's a conundrum.|
I found it interesting that the BBC used The Nuclear Consulting Group for several interviews, This is an anti-nuclear group but are clever how they do it.
In the UK we have actually started burning coal again becaue of the cost of gas
|Thread: VFD size|
From the picture of the motor plate in the OP's album the motor is a conventional single speed 3 phase.
What is the actual current setting on the VFD? This is P12.0 (motor) and P12.5 (drive). The tables you show say 5A set but that a 2.2kW VFD output is 10A max.
|Thread: Restoring the scale on engineering tools|
A Lacquer-Stik Paintstick is the best option for engraved marks.
Random googled supplier
EDIT: Instructional video (reversed colour)
Edited By Robert Atkinson 2 on 05/11/2021 15:38:40
|Thread: Chuck Guard|
Guards that are supplied with or fitted to a new machine must be fitted when used in any commercial environment. Not just schools or training. The guards are part of the machines approval. In theory a company could remove them if a safety assesment was carried out. If there is an accident they may have difficulty justifying that assessment.
Edited By Robert Atkinson 2 on 03/11/2021 20:10:30
|Thread: Replacement surgical blades for Swann Morton scalpel handles|
ebay don't allow the sale of knives so you should not find many on there.
|Thread: Guided bus lane|
I don't know about St Ives, but there are couple of places in Cambridge where the start of the guided busway is tarmac not concrete, The buses join it there and it would be much easier to mke a mistake than were the tarmac road crosses the busway at 90 degrees or so.
|Thread: Advice from the photographers.|
The do only zoom in, but they were designed for a full format so 1:1 = 0.6:1
You can get new copiers designed for DSLRs with APS-C sized sensors. Quality can vary.
|Thread: Aircraft General Discussion|
I missed John Doe's post earlier.
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