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Member postings for John Haine

Here is a list of all the postings John Haine has made in our forums. Click on a thread name to jump to the thread.

Thread: Trademark Infringements
17/04/2021 11:56:37

Best to leave the trademark holders to enforce their rights I think should they find it worthwhile.

Thread: Stop ended Tee slot in Meehanite
17/04/2021 11:54:18

I suspect the Amolco (if it's like the one I used to have) might struggle with a 3/4 tee slot cutter TBH. Why not just have a tapped hole in the (heavy) base that the tee bolt fits, take the nut off first (putting it somewhere safe of course...).

Thread: Tormach in the UK
17/04/2021 09:16:23

Last para of the PR -

"Andy Grevstad, Tormach’s Business Development Director, said, “Customers have been clamoring for a better way to purchase our mills in the British Isle[sic], and we’re excited to finally have some boots on the ground in the UK. We’re hoping that this can be a path forward for more distribution throughout Europe.”

Maybe they chose the wrong base for that...

Thread: Looking for a block of cast iron please
16/04/2021 22:03:17

**LINK**

Unless you collect it, given the density is constant, the postage will be the same.

Thread: Arduino CNC Board
16/04/2021 12:31:10

How many do you need? I got a box from either RS or CPC, many more than I'll ever use.

Thread: Myford Backplate tapered thread size
14/04/2021 16:53:24

What do you mean by "tapered"? The standard Myford thread is 1 1/8" 12 tpi. There should be a 1 1/8" plain "shoulder" near the main body of the spindle, normally called the "register" which makes the backplate run true (if the latter is accurately machined). If your nose actually tapers in diameter you have a problem! It would be seriously worn.

Thread: Lathe DRO
13/04/2021 16:13:16
Posted by Roger Best on 13/04/2021 14:39:07:

Hi Jim

You don't actually have a problem wrt DRO. The cross slide, as Duncan says, is mainly to facilitate some of the more complex processes, especially increasing depth of cut on a thread, for which setting it to 30degrees, (or 60 depending on your lathe) is ideal.

If you watch Ade's workshop he is particularly good at explaining the use of the DRO for incremental cuts. I am sure that as you use your machine you will get used to making fine adjustments and getting sub-thou' cut adjustments as a result.

No, the top slide is for that!

13/04/2021 08:39:44

On CNC lathes Z is movement parallel to the turning axis, X the cross slide, there is no Y! The X and Z nomenclature is not needed on a manual lathe so one might as well be consistent if you are going to label the axes.

In CNC the lathe is though of as a mill turned on its side and back with the spindle on the left.  This means that (radius mode) g code from a lathe can also be used on a mill where the work is held in the spindle and the tool on the table to the LHS of the spindle.  This is why slightly counter-intuitively a lathe thread in CNC is described as  RH when the chuck is rotating CCW as the operator looks at it - it's rotating CW if you look from the left hand end.

Edited By John Haine on 13/04/2021 08:55:08

Thread: Hobbymat MD65
13/04/2021 07:08:58

Good that it is now separated! It looks like it needs a little bit of careful cleaning on the inside of the taper as there seems to be some corrosion as well. Maybe your machine shop has an MT2 taper reamer that they could give it a very light scrape with?

Thread: What Did You Do Today 2021
12/04/2021 18:38:46

pxl_20210412_173221388.jpg

First attempt at helical milling, very slow but successful.

Thread: Laptop with a SD card slot
12/04/2021 14:24:43

Just had the same problem, solved by spending ~£7.50 at Argos for a USB C adapter that takes SD and microSD cards and also gives you an ordinary USB port (my laptop has only one USB A but 2 USB C ports). My new phone and tablet also have USB C.

Thread: Oddball inverter
12/04/2021 11:07:05
Posted by Michael Gilligan on 12/04/2021 10:48:33:
Posted by duncan webster on 11/04/2021 21:57:39:

.

P.S. ... it is not unusual to specify motor output power ‘at stall’

Edit: some decades ago, I used one of these:

**LINK**

Edited By Michael Gilligan on 12/04/2021 11:05:35

?? Surely when stalled speed = 0, so power=torque x speed = zero too?

Thread: Lathe drive motor
11/04/2021 13:57:53

If it has brushes and is an AC motor it will be a "universal" type. I doubt it was original equipment but was added by a previous owner. Frankly it would be kindest to give the motor a decent burial and fit a small single phase induction motor if your friend intends to use the lathe.

Thread: Bandsaw - wood and metal ?
11/04/2021 13:30:13

I have a Femi 782 which is designed for metal and will cut up to 65 mm bar iirc. Jason has one too I think? I also have a table for it to use it in vertical mode for sheet. It will cut wood though not designed for it. Highly recommended. Stakesys is a good supplier.

Thread: What Did You Do Today 2021
10/04/2021 13:02:58

Finally connected up the 4th axis drive on my Novamill so I can experiment with some helical milling.

pxl_20210410_115434268.jpg

Thread: Arduino CNC
09/04/2021 12:36:06

Thanks Ronald, I'm giving that a try.

Thread: Photogrammetry
09/04/2021 09:59:32

Given some photos of (say) a Tinker tool & cutter grinder, it should be possible to reconstruct the plans?

Thread: "TINKER" tool & cutter grinder
09/04/2021 09:20:56

It wasn't in any of Lautard's books, he just offered to sell you the drawings. It might be possible to ask Ms. Lautard if she has a favourite international charity (e.f. Red Cross, MSF, UNICEF) to which you could make a contribution?

Thread: Chronos Wheel Engine
09/04/2021 09:16:44

A quote from the thread I linked to above:

"The originator of Chronos was Eliot Issacs it was he who designed the wheel cutting engine It was serialised in Clockmaker magazine @ 1991/2 I made one and still use it

Eliot sold Chronos off I think in the eighties"

Poster was Roy Entwhistle.

09/04/2021 07:17:59

Try this thread

**LINK**

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