Member postings for Ian Parkin

I have been tasked with getting this Enfield clock going again…all looks good but for the escapement spindle which has worn the hole in the frame about 2 diameters

how does one go about repairing this?

Saw an article on facebook about these gas generators that burnt wood without much air thereby generating hydrogen methane and CO2

apparently 50 million were sold during the 2nd WW

does anyone have any experience of them?

My point about a NVR switch in this application is to stop the real risk of electrocution if someone unplugged the 3 pin plug wired directly to a drive.and touched the pins within the discharge time.

all drives make note of this in the manuals..( i have been shocked too by this)

in my day job i repair many machines with drives and have NEVER seen a machine without a NVR device (meaning if the power supply is removed the main machine is isolated from the plug). fitted to prevent back flow to the plug

NVR in this application isn’t to do with the machine restarting if power is restored

bigger machines with 3 phase supplies wired into idolaters with conduit still have a contactor to disconnect the supply from the machine control circuits if the supply goes down

I’ve never seen a commercial machine that didn’t have a NVR on the single phase input to a vfd

if you connect the input wires direct to the drive the pins are going to be possibly live for 30 seconds or so when unplugged

we can all do what we want with electricity in our own workshops but you do have to think about others..

Robert

the nvr is to protect anyone who unplugs the supply and then touch’s the pins of the plug

i have had shocks this way in the past from quality drives

theres a warning re this in most manuals

Is there a wiring diagram showing the wiring for delta/star on the inside of the terminal cover?

It’s always good practice to get the next size up vfd to the power of your motor

yes you can connect up the vfd to a 3 core flex to a 3 pin plug but best to put it through a switch (nvr) as there could be voltage present ion the plug pins when its unplugged

the vfd connects directly to the motor (with nothing switchwise in between) using 4 core wire

then you use new switch gear start/stop speed(potentiometer) forward reverse switch emergency stop to control the VFD

you can set the frequency range between 25 hz and 100 hz and leave the belt on the second pulleys and have all the speeds you want at the turn of a knob

SK

what was the lens you bought designed for?

We have a wildlife camera that you can use for live viewing

its set up on a bird table and streams the feed 24/7 notifys by a message to ones phone when it spots movement and records and/or takes stills

you can also just look at the feed at anytime day or night wherever you are on your phone/tablet/computer

images are great for viewing at large tv sizes

Vic

if you just get a spigot with a m33x3.5 thread on one end

put the plain end in your chuck 3 or 4 jaw or collet chuck on your MW lathe then your WW chucks on the thread

Ian

10mm

No problem in tapping m6 in a 10mm bar but i would try 12mm square at least or even14mm reduced for the last inch..to avoid bending on long overhangs

https://simplybearings.co.uk/shop/p20276012/500mm-Long-x-25mm-Wide-x-1mm-Thick-Flat-Rubber-Drive-Belt/product_info.html

Simplybearings do them 25mm wide and 10mm increments in length but £35 ish

Howard

most of my dies that are 2” are not actually split but solid

Howard

just been to measure my die holders…i have a few 2” ones and they are all 18-20 thou over 2”

I have ordered some of the cylindrical wire brushes that Nicholas linked to for now …not seen them before I’m sure they will get most of the rust off

I have 2 spindles with mt3 holes that have never been used but have a coating of rust ( not thick just a coating)

i have reamers but i was wondering about the rust damaging my expensive reamers.

have i seen a wooden mt male with a slot cut along its length for a strip of emery to clean up mt sockets?

or any other ideas

JD 2 it seems to be a new word for momentary

I have ordered a set of grid switches plates and covers from Screwfix for collection tommorow (the varilight range) the bg range is sent from supplier so would be Wednesday or so before it came.

i must confess I hadn’t heard the term “retractive “ applied to a switch so me searching for momentary drew a blank