Member postings for _Paul_

Also works well if you have a chuck which is a bit old and worn centralises the stock very well.

I made a double ended one so it's then easy to change it around on the Aloris QCTP from facing to turning mode.

Took the bearings from an old VCR.

Paul

Drives Direct are very helpful (usual disclaimer) and there is a chap advertises VFD's etc. on Homeworkshop Gavin Oseman.

Paul

When I bought my old Norton grinder it came with a "Drytex" unit works great though might not suit all as I think they were all three phase, this is mine running from a built in homemade static 2 to 3 phase convertor

Paul, Do you stop and start it a lot that will generate heat.

Three phase, if you do this using an Inverter it will give you unparallelled speed control, in the time you have used the machine you must have come across chatter when cutting/facing something with a single phase machine if you wish to do something about it you have to reduce the feed or speed which can mean stopping the machine and in the case of the Super 7 changing pulleys or selecting backgear, imagine instead just reaching for a control pot and simply turning the speed down.

Paul

What I made today

Edit Images resizes. J

Edited By JasonB on 23/03/2013 20:01:18

Not tried that utility thanks for the link, I have used this for a good number of years Alan J Munday's Model Engineers Utilities

Perhaps a bit of swarf in the drivetrain or possibly a dry or binding bearing? as the results are consistent despite your varying feedrate it may be in the primary part of the geartrain.

To help narrow it down have you might want to consider turning the gears by hand to feel for any tight spots.

Paul

If your Emco has no lateral tailstock adjustment and you need the accuracy you could try putting a boring head in the tailstock to compensate for the error without machining/scraping.

The Emco is a small lathe? so whilst a boring head might counteract the discrepancy it might also reduce the available space too much in which case you could make an offset tailstock centre.

Paul

Edited By _Paul_ on 09/03/2013 08:33:56

I've noticed stop/start varies quite a bit depending what machine they are running I have two identical Teco 2HP drives one is built into a Varispeed 2J (2HP) and the other powers an old Geo. Taylor mill (1HP TEFC) & Boxford lathe (3/4 HP Gryphon) (and a 1/2 HP Alba shaper occasionally).

The Drive running the old mill & Boxford will (E) stop under a second but the one running the Bridgeport takes some time to run up and quite some time to stop >5 secs I can only guess that is down to the mass of ironwork in the head of it, working the spindle brake produces a faster stop but the drive goes into error with a code of OCD (back EMF?).

I have tried adjusting and mirroring the parameters on both drives but it makes little noticeable difference to the BP.

I would like the BP to stop a little faster might hekp me keep my digts a while longer!

Going back to Michael's original text sadly a clutch wouldnt be practical in my application so I guess my next stop will have to be a braking module never tried one do they actually work?

All this chatting has made me a little Horse....

Paul

+1 especially as the swarf bin is full.....again

Today nice and quiet finished making some table cover "boards" for one of my mills and the rest of the day sharpening Slot Drills

Ron I forget the amount of times I have "thought that looks handy" then years later pick the offending item off the shelf in it's seldom opened box...and wonder why....

The answer for me is not much more than a few files perhaps a pillar drill which will also give you "crude" miling capability a welder of some sort and of course where would you be without a hammer or two!

Tool collecting can be an expensive "disease"

Paul

Apologies to the OP for the hijack but I still use stones of varying types I wouldnt mind shifting to Diamond I do have a question though what would be a reccomended replacement for a pink 60 grit 6" x 3/4" stone do diamond wheels have some form of equivalence/comparison chart?

Paul

I have a quite old 1953 model "A" and it too is in a cold workshop it never seems to actually suffer from the cold though.

It is powered by a three phase 3/4 HP Gryphon motor what yours running on?

Paul

Sorry gents Lidl & they are £7.99 ea and two left on the shelves in the Newport (Gwent) branch opposite the New University building.

Paul

Edited By _Paul_ on 18/02/2013 12:30:29

Just bought a couple of these

Whilst not super bright they do have a very strong metal clamp foot unlike the Homebase one's I had which had a weak plastic foot

Paul

Some questions:

What tooling are you using HSS or Carbide?

Is your tool on the workpiece centreline

and are you certain its Mild steel as it sounds like it's tearing?

Paul

For not only delivery but diligence, common sense and good manners the people at Arceurotrade take some beating.

Paul

I use ER32 on just about everything, I have noticed a marked performance difference in the type of ER closing nuts, from experience the ones with an integral bearing take "less force" to grip than their plain counterparts and are less prone to slip.

If I do have an ER collet slip it's normally down to me not tightening it enough.

Like everything else though it comes with a price, on average the bearing type are 3 times more than the others.

Regards

Paul