Here is a list of all the postings John Rudd has made in our forums. Click on a thread name to jump to the thread.
|Thread: stepper driver|
Very neat Duncan....
Looking forward to seeing the rotab conversion...
|Thread: Motor control circuit|
I knew it was a mistake to reply to this thread.....
What vfd do you buy?
The makers manual should have a typical connection drawing showing the incoming 1ph supply with their recommended protection devices and whatever is shown on the outgoing side to the motor. Following their installation recommendations should suffice in terms of meeting any protection requirements.
Typically, fused protection or rated mcb on the input and direct connection to the motor on the outgoing side with maybe a filter.
There is certainly no need for anything too complicated.
For your own protection there should be an nvr switch on the primary side.
|Thread: Open Crank IC Plans|
Steam or ic?
There is the Webster OC engine that is ic....
|Thread: Mini lathe|
I sent you a private message, check the flashing envelope at the top of the page.
|Thread: What new lathe?|
Nice...!! ( no jealous smiley)
Nice looking shop too..
I hope you and your new machine have a lasting relationship....😂
|Thread: Smoke detectors|
Edited By John Rudd on 24/03/2019 13:36:48
In a former life, I used to service the Fire and Gas installation where I worked...
So to answer your questions...I offer the following:
Rate-of-Rise (ROR) heat detectors operate on a rapid rise in element temperature, irrespective of the starting temperature and can operate at a lower temperature fire condition than would be possible if the threshold detection point was fixed.
If you do go for smoke and heat, dont forget to have a testing regime in place.....We tested our systems every three months...
|Thread: Boxford 8" Shaper Problem|
Can you set the machine up as described then, without a work piece, set it going and watch what happens...?
if it repeats its issue, try again, but this time manually crank it and watch the bolt? You may see something you may not...and further investigation needed..
|Thread: Teesside Model Engineers|
Do you have the details of the Tyneside one plz? I live up at that way now....being new to the area too..
Edited By John Rudd on 18/03/2019 15:10:12
|Thread: Doncaster ME show 2019|
Emgee,if the above fails..
|Thread: Tool Post Milling/Drilling Attachment|
Is the motor a universal type or permanent magnet? ( guess I really ought to ask the seller....)
Edited By John Rudd on 14/03/2019 19:42:23
|Thread: Digital angle gauges|
I also own a Wixey, I do as IanT. I keep mine indoors in the warm..until needed.
Thanks for shouting up John....Nice to know there are folk prepared to share...
|Thread: What gas for a Centaur?|
You could make a smaller volume gas tank to fit in the base, just decant from your blowlamp canister to fill it...
ESR is just up the road from me.....Very good supplier of components, Steve and Anthony are very helpful...if you need advice..
No problem....Tell us which inverter you go for...I'm sure the collective will have you up and running....
They wire up as easy as any other vfd. The challenge comes in the form of interpreting the Chinglish manual when dealing with the setting parameters. It can be more of a challenge for the less technically minded.
I believe one or more forum members has a set of parameters that will make the inverter work as required. Perhaps they will make themselves known via this thread?
I could work them out if I had the manual in front of me, but cant remember them all from memory/experience..
One of the things I liked about the HY inverters is the fact that the output stages are using discrete components rather than a module..Repair option is more feasable... If/when needed.
Edited By John Rudd on 12/03/2019 22:34:08
Drives Direct of Nottingham.....Dave has supplied me with numerous Imo/Teco drives, never let me down.
Alternatively, Invertek are a UK designed/built/supply company with suppliers in the UK. Got my two from Engineers Mate.
Had a query, contacted Invertek direct and got the answer I was after.
Edited By John Rudd on 12/03/2019 20:19:33
There is an element of truth in the number if starts for a motor....1ph or 3 ph.....This is because of winding temperature......we had some large motors (110kw) driving large fans, these were limited to 3 starts per hour...but were dol motors....the large starting currents causing the motir windings to heat...
In our applications where the motors are driving basically unloaded, via a vfd, the issue doesn't raise an issue....personally speaking...
Other users may have a differing opinion, but I wont lose any sleep worrying sbout my motors..
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