Here is a list of all the postings Ian Parkin has made in our forums. Click on a thread name to jump to the thread.
|Thread: Motorcycle General Discussion|
Yes he was quite rude when i pointed out his rear brake linkage wasnt much good.
This is whats wrong with not having to have a mot for over 40 year old vehicles
people change things with no real idea of the consequences of their actions
Says it tax and mot exempt
always passed mot’s
He’s asking 8K for it
Edited By Ian Parkin on 17/08/2019 15:05:58
Just seen this bike advertised on a local forum
have a look at the rear brake actuating rod..
wouldn’t want to be relying on that in a panic stop
|Thread: Grid Frequency [mains electricity]|
I cant really understand why it needs complex algorithims and a mocked up supermarket and university researhers to realise that if you switch off a fridge/freezer for a matter of minutes then nothing really is going to happen to your stored food.
the original more indepth article in the paper rather than the online one i linked to suggested that the fridges were generating power to pump back in rather than just reducing demand
if just tesco are using 50 MW just imagine what the total load is over all of GB for all fridges and freezers industrial commercial and domestic
reversing the mains input will do nothing to a synchronous motor’s direction but taking it to bits and reversing components will for your old bosses clock
in the guardian on monday was an article about Tesco’s being able to use their fridges to pump back in to the network to the tune of 50MW ..i’m Not sure what they mean by this perhaps they have big back up UPS’S to keep their fridges going in the event of a power cut
Edited By Ian Parkin on 13/08/2019 14:37:24
From the frequency website that micheal linked to I,d not heard of copper clad aluminium before I,d heard of alloy clad steel...
|Thread: Harrison M300 or M250 pulley/belts problem|
If the cap head bolt is your only problem then whip it out replace belt refit job done
|Thread: WM18 - Z Axis power feed|
The one i linked is 40rpm but also 7rpm???
i seem to remember mine is 50 rpm (i’m Not able to check until Friday)
suppose it depends how fast you want but i flick the switch and rarely have to wait long till the heads where i need
This one would do nicely
and has a right angled drive saving you buying gears
That’s a parvalux geared 24v motor easily available off ebay and with this motor you would have to put a clutch in as you wont be easily overrunning it if you want a manual handle too..why you want a handle?
Edited By Ian Parkin on 23/07/2019 14:36:36
Edited By Ian Parkin on 23/07/2019 14:37:14
|Thread: Universal T milling machine from Chester : Issue with Starting|
Those diagrams dont seem to be of your machine
theres no VFD for a start
Is yours single phase or 3 phase?
Turn off all the QF switches 1-6 and turn them back on
sometimes these trip without showing
after then we need a diagram
I would say not
its as cheap as a cnc can get and still work
theres no software with it...mach 3 is £120 ish or the free mentioned
the motor will drive you mad with the lack of power and noise
soft wood ,foam but no metals at all not too sure about acyrilics
and it has a very small work envelope
|Thread: What are these wheels /tyres?|
i had searched for “all terrain vehicle” to no avail
”atv “ brings up loads !!!!!
|Thread: Chinese speed controller|
where are you Rob?
I can do you a small 3 phase motor and vfd cheaply if you want
and a 3phase and vfd is only 240v so no more hurty than what you have now
|Thread: Worx 20V drill issue|
The coming to an abrupt stop is the brake circuitry working perhaps?
|Thread: mark 1 1/2 student with an inverter|
So mount your inverter VFD and wire in the 3 wires out to your motor after charging the motor terminals to delta from star...
its best to supply the power to the vfd via an isolater
you can use your original handle switch and the reverse switch easily it don’t make any difference low or high voltage
your start switch just wants a normally open pair
your reverse wants a common to a NC one way and to a NO for reverse so whichever way your reverse switch is it sends a supply to the vfd to start in the relevant direction
You do need to be able to use a meter on continuity to work out the switches
you may also have a switch to the key on the cupboard and one on the gear guard
POST pictures of what you have if you are unsure
Edited By Ian Parkin on 11/06/2019 12:56:55
Edited By Ian Parkin on 11/06/2019 13:24:42
Short answer NO
You need to wire directly to the motor from the VFD
then use the switches to control the VFD
Exactly the machine i have with VFD but i have a clutch too
|Thread: A kitchen table workshop. Tool grinding problems|
Steve I was going to post you this gratis if you think you may use it
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