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: fobco drill|
This is how they work on most fobco’s I’ve had both stars and larger
take the clamping mechanism out and look at it
its a bolt with a collar ( loose) that has a piece machined out of it to fit round the shaft
and a nut at the other end with a similar part machined out.
when you tighten the 2 pieces pull together and grip the shaft
theres no moving of the casting
|Thread: Larger VFD/Motors|
Its an Emerson commander control techniques one
its by far my preferred choice of vfd’s if i’m Buying one new
easy to configure and the instruction book is only 40 pages long and they seem to do everything i’ve Wanted i’ve Probably installed 40 of these on various machines in day job
This meter is showing the load on the single phase input on my 3hp 2.2 kw motor running via a vfd under no load and running the spindle with a cut on ,on a Colchester student
Edited By Ian Parkin on 06/05/2019 10:38:49
Edited By Ian Parkin on 06/05/2019 10:39:35
|Thread: Bandsaw speed|
Is it a Inca saw?
I use my Inca for cutting non ferrous materials with no adjustments
You cant really speed control that motor
replace motor with 3 phase or bring the motor off and use pulleys to slow it down if you think you need to
|Thread: joining green laminated belt|
Though if you just clamp your scarfed joints into 2 slices of alloy and hold it at 100 c for 30 mins you should be good to go
You probably have a habisat belt
this the official kit that they recommend.
|Thread: Building a Belt grinder - advice please.|
i went for the 1440 rpm motor so i can run it from 20hz to 100hz Or 570 rpm to 2800 rpm
so with my 200mm driving wheel i can go from 361metres/min to 1758 m/m (that’s 100km/hour)
Its been very useful so far i have built a mop shaft to take 200mm dia mops or wire wheels taking the drive with a rubber flat belt
I built a 2x 72 grinder using a 3 phase 2hp motor 1440 rpm driven from VFD so variable speed
It can be stalled easier than i thought or rather the over current trip on the vfd trips out
I used a pallet truck wheel as the driver so 200mm dia
|Thread: Heavy Machine Removals - any suggestions?|
What sort of cost is prohibitive?
i have a lorry with crane sometimes available in those areas
|Thread: Anyone got a hydrogen generator?|
it certainly looks well made
its like a small welder 30cm x 20 x 20cm and weighs 5 kg empty
i’ve only done edge polishing but the flame looks good enough for precision heating of small parts/jewellery etc
it runs for about 20 seconds and then switches off on a pressure switch then cycles on/off as you use the produced gas
Edited By Ian Parkin on 14/03/2019 10:08:39
Well i filled it with my mix of 150g naoh and 1 litre of water and filled the booster with methanol as directions and it certainly works well.
as said teh flame is very hot and virtually invisible though it polished some 15mm Perspex edges very well..
How long should i leave the electrolyte in? And if it should be removed can i save it and reuse?
It was only £110 delivered from Belgium by ups
Edited By Ian Parkin on 13/03/2019 15:57:26
Has anyone got one of these hydrogen generators i bought it for acrylic edge smoothing but seems it can be used for small repairs on jewellery etc
it came with some naoh 500grms.the instructions say make up a 15% solution..so that’s 150gr of naoh to 1 litre of water?
anyhow does anyone use one and have any operating tips?
|Thread: Myford Lathe on Ebay|
What’s the part between the 2 biscuit tins that looks like it clamps on the bed and has 2 arms with what looks like a offset centre ?
|Thread: Machine cleaning.....|
whilst i cant speak for flash ultra i can recoomend" elbow grease" which is sold in the cheaper outlets at only a £1 for a spray bottle.
i buy it in dozens when i need it spray it on brush and wipe
it also works well around the house too
|Thread: Rack operated tailstock|
|Thread: Telephone / Internet Scams|
I had a call the other day re stopping unwanted calls.
the Indian sounding woman was most insistent that I was responsible for the landline bill and I was a homeowner and younger than 85.
i responded with well I’m 87
call ended immediately
whats the method in only targeting under 85 year Olds?
|Thread: Overload trip|
Remember that the current draw for this motor is only 33mA so even a fuse will struggle to protect that
I’d agree that some way of detecting a stoppage would be best
|Thread: What Did You Do Today 2019|
They made a mistake on the listing for the sets and cancelled the listing relisted now with proper price for the sets
|Thread: depleted batteries|
I saw a video on YouTube about someone with the same problem
He discharged them (if not already) then put them in the freezer for 24 hours then let them defrost well then recharge in the normal way
Then all was good (apparently)
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.