Member postings for Emgee

Hi Will

Thanks for the update, seems you will need the Homann DC06, just then need to wire from the speed pot connections on the Emco control board to the Homann board, this part of the board will then be at mains voltage but is isolated from the electronic side and earth, just be aware.

The other connections on the board are all to provide Mach control of spindle on/off/speed/direction and will be similar to your b/o board connections.

Keep us posted.

Emgee

You don't say anything about cutting fluid, it always pays with aluminium to use a cutting agent such as parrafin, WD40 or something similar.

You haven't said which grade aluminium you are using, some of the cast variety are hopeless to form threads on or even get a decent finish when turning. I thread 6082T6 regularly and the finish is good, best if you can use a full form insert type tool.

Emgee

PCD insert

Emgee

Hi Jason

Were you using CI pistons lapped to suit bore and no rings ?

Emgee

Hi Grant

Certainly not short of clearance spindle to table, looks good.

Emgee

Keith

On a manual mill I used mainly 4 flute cutters and max DOC was equal to the diameter of cutter in use, width of cut and stepover was a quarter of cutter diameter, this was on a Victoria universal which is a heavily built machine.

As others have said take your time and experiment with different speeds, feeds and DOC but be caerfull you don't let the cutter just rub the work as it can blunt the tool.

Emgee

Roderick

From the town centre is quite a hill to climb before getting to the trading area where RDG are so my guess is they are clear of flood water.

Emgee

Like Bazyle I have a habit of setting all tools where possible to the same X=00 setting, this makes life easier when entering tool offsets into the program when using cnc. Tools that can be set this way are RH, Neutral, LH, Grooving, Parting, Chamfering & External threading.

Emgee

EDIT Should of course be E&N connection

Emgee

Edited By Emgee on 22/12/2015 11:55:03

Clive

I don't know the style of property you live in but this sounds familiar to me, fault eventually traced to mice damaged T&E cable in a loft, vertigris formed around the damaged cable and sufficient path LE for a fault to trip an RCD, the same would happen with NE fault.

Emgee

Hi Nick

Doesn't your chuck and spindle have preferred fitting points marked ? so you always fit to the same orientation.

Emgee

As Martin suggests, check for run-out of the chuck mounting surfaces on your threaded adaptor with it fitted in the mill spindle. Any run-out indicated increases the further you move from the measuring point and will be several times greater beyond the chuck jaws.

Emgee

Hi David

Sounds as if the bearing bores are not at 90 degrees to the other shaft coming in from the left side of pic, is there another bearing on the underside as in the picture ? If so I guess the high and low points are reversed, this would confirm my opening sentence.

Emgee

If using a fixed steady with chuck mounted work if the steady fingers are not truly holding the job on centre there is a strong possibility of the job "walking" out of the chuck.

This action will be apparent when facing, the cuts get increasingly heavier until you realise what's happening and too much has been removed.

Steadies that hinge open are normally stiffer than open sided ones but this may not always be the case.

Emgee

Chris

The best of both worlds and you still have the "slipping clutch" of a HSS tap in the chuck jaws for safety.

Emgee

Denford steady in use, nylon collar fitted over work and clamped on with a Jubilee clip, saves running steel fingers on the aluminium tube of the tuned pipe.

Emgee

Hi Nicky

Search in your browser for

Lathes.co.uk

All makes and models there for you to look at and compare.

Emgee

Another substantial fixed steady on a Denford Orac, modified base to suit this lathe, very sturdy.

Emgee.

.

Hi Dinosaur

The Hofmann head I had the division plate was drilled both sides, have you ever had yours off ?

Emgee