Member postings for Emgee

Hi James

Colchester group on iO Groups has manual in the Files section, Apron switch control is in pt 3 of 7 PDF docs.
join at the Homepage and follow the link below.

**LINK**

Emgee

Time flies, I made the tap in 2015 which I mentioned in my last reply, video link below shows the turning, milling, hardening and flute finish grinding process.
**LINK**

Emgee

Hi Ian

Some time ago I made a tap from silver steel and hardened it for use in wood, it had 45 degree flanks so thread form was 90 degrees, the person it was made for reported it worked OK.
The part in your pic seems to have rounded crests, can you measure accurately crest to crest to confirm the pitch is 1mm ?

What is the minor diameter ?

Emgee

Yes now I read the post title and see alternator I agree I was mistaken, however don't vehicle alternators have integrated rectification so the output is DC + and - ?

Emgee

Hi Tim

Did you make a mistake with the keyboard re marking the output red and black, your statement advises against this actiion ?

Emgee

Hi Gerry

What does your builder think is the best course of action ?

Emgee

Yes it will work but remember to allow for the diameter of the cutter when moving the table axis to position the work, move 1/2 hole diameter minus 1/2 cutter diameter from the centered under spindle position.

If you have any backlash in the rotary table operating screw take care if climb milling the cutter doesn't grab the work, also lock the axis movements on the mill table before cutting.

Emgee

Interested to know if you are using threaded parts on the various joints of the tuned pipe.

Emgee

Finished a couple of parts for my neigbour's 1937 Rudge motorbike, the 1/4" threads had stripped from 2 of the original clutch plate securing screws and he wanted some 5/16" x 26TPI made as replacements, he only wanted me to part finish the threads so left .008" for him to take off with a die.
The ally block was for him to fit the stud into and clamp in the vice to hold it whilst using the die.

Emgee

I am fortunately not using any hearing aid device but can report that my late brother-in-law had 2 sets from different private suppliers that had all bells and whistles, but changed to a set from the NHS which he said gave improved hearing and less trouble than those costing a fortune, in one case £4000

Emgee

Dave

I believe some points in your statement need more discussion.

The neutral conductor cannot be termed safe as if the neutral conductor is broken between the load of a piece of equipment on the circuit and the consumer unit it will be capable of giving a full mains voltage shock to a person or animal if they provide an earth path for the voltage to travel down.
The circuit may or may not be protected by an RCD to detect the fault to earth, so current flow would only be limited by the body resistance and eventual circuit protective device operating to isolate the circuit live.

Many properties rely entirely on the suppliers earth (PME) and have no independent earthing arrangement, it is only in mainly rural areas where no supplier earth is provided where the installation will be provided with it's own earthing system, usually copper rod/s depending on soil resistance.
These usually overhead service (TT) installations to comply will always be protected by an RCCB (RCD) which can be 30ma or 100ma operating current so still no guarantee of the neutral being a safe conductor.

Emgee

Not a good idea IMO, use the power source earth.

Emgee

It is important to connect the motor earth conductors to the incoming earth supply at the VFD, and as said start by connecting the screen at the vfd end only and test.

If you are using the correct glands then if the motor terminal box is metal you will need to insulate the screen from the gland, or use a plastic TRS gland in the first instance, revert to the correct gland for connecting the screen to the motor earth conductor when/if you want to connect the screen at both ends.

In your case because you have only a 2M run and a small load the reduced size of the 3 earth conductors will no doubt be satisfactory to pass an EFLI test, however they may need a suplementary earth conductor if used with large motors and/or long cable runs.

Emgee

Hi Bosun

I use a 0-30mm dial indicator as a check for X axis positioning on a cnc lathe and find it is in unison with the cnc tavel of the cross slide so would say it could be used to measure but that is not normally used for that, just to provide an indication of the program X datum.

Emgee

If the 16mm OD and the 10mm spigot were turned at the same setting the problem lies with the drilled hole and the bored 16mm hole in the plate.

Emgee

Recently I have been using bacon fat collected from the grill pan before washing it up, works well when cutting/ drilling and tapping various grades of aluminium. Probably works as tallow did for threading steel conduit, very similar consistency.

When my RTD bottle became empty last year after 10 or more years of use I replaced it with a much cheaper substitute which works well.
Always a can of Trefolux for use by the drill stand when drilling steel.

Emgee

Hi Roger

Some makers suggest connecting the screen to earth at both vfd and the motor, others say only at the vfd so check what your maker suggests.

Get ready for those who will tell you the cables should be terminated in a gland plate, no doubt a good idea but not related to your interference problem.

Emgee

Just for information BT30 arbors are normally available threaded M12 or !/2"UNC and are termed quick change as it is usual to retain them with a pull stud fitted. My Emco F1 spindle is SK30 but the BT 30 are the same taper and dimensions. INT30 taper is identical but has the short parallel extension which is threaded for the draw bar.

Emgee

Cutwell sell Full Form inserts in most thread sizes, LH are listed, saves using a die to form the crests.

Emgee

That design looks a lot like the resetable dials Ivan Law used to sell for the ML7.

Excellent numbering and knurling on Dave's sample pictured.

Emgee