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Member postings for Nick Hulme

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

Thread: Mill X axis
19/06/2019 17:30:46

You can buy a variable frequency pulse generator and use it as the input for a stepper driver, Arduino is definitely complicating the job unnecessarily.

Thread: Limitation of a milling machine with low spindle RPM.
18/06/2019 08:58:51
Posted by Ian Thomson 2 on 17/06/2019 13:05:40:

For example the GH18 has a top spindle speed of 1420 rpm. The WM18 has a top speed of 2250 rpm.

That's still a low spindle speed, I have an Emco FB2 head which I run at up to 4000rpm and don't consider that as a particularly high speed.

Thread: Material storage fpr Lathe/other machines
14/06/2019 20:15:01

I have Spur Shelving above head height for long lengths and a 900x600x1800mm 1000kg per shelf rack system with mesh shelves for shorter lengths.

Thread: How to machine Acetal
14/06/2019 20:10:57

I use polished the TC tooling specified for Aluminium when machining plastic, it works very well.

Thread: New vice, good choice?
11/06/2019 16:53:07

A vice of this form was the first which allowed me to machine work square.

I tried many cheaper models first, it would have saved me money to buy a more expensive vice first! :D

Thread: DraftSight no longer free
08/06/2019 17:16:57

Crikey, a disappointment for cheapskates everywhere! :D

Thread: Is CAD for Me?
08/06/2019 17:15:51

I started using CAD/CAM at 50, get stuck in, if you have the drive to do it you will succeed!

Thread: Hexagonal Socket Drive
06/06/2019 21:06:58
Posted by Kenneth Deighton on 06/06/2019 19:36:50:

In my apprenticeship days we still used the hexagon type socket sets , the advantage of them was the sockets being much slimmer than the square drive ones and you could get them into smaller gaps etc.

Ken.

That will be because a hex is smaller than a square then? :D

Thread: Coolant Flow Rates
06/06/2019 21:03:31
Posted by Nigel Graham 2 on 06/06/2019 20:46:26:

Thank you. Umm, I had specified conventional, not NC, machines.

The provision of cooling and the removal of chips to prevent re-cutting is the same principle on manual or CNC, especially in the absence of a full enclosure.

Thread: mark 1 1/2 student with an inverter
05/06/2019 19:13:12

A friend and I re-wired his Harrison M300 for a VFD, we used all the standard switches re-wired to handle 24V control signals for the VFD so it now works exactly as it did with a 3-phase supply but with the addition of a speed control potentiometer.

Thread: Another Workshop lighting problem
05/06/2019 19:06:11

I had double fluorescent tubes fittings throughout my garage and singles in my workshop, the LED replacement tubes give better working light than the fluorescents ever did.
I chose LED replacement tubes and rewiring the fittings to eliminate the ballasts, part of my reasoning for this route is that the parts which will eventually fail are an easy user replacement, whereas dedicated LED fittings commonly require replacement of the full lighting unit when they fail.

Thread: Stepper rating for Triac upgrade?
31/05/2019 22:10:18

Servo.

Thread: Denford Triac - Remove Easy Change Holder?
31/05/2019 22:09:17

It's a shame it wasn't a useful native taper

Thread: Just for the Record
31/05/2019 22:01:51

I have the Record powered milling column for one of those but no mounting bracket, I used to use it as a cross slide milling attachment on my Myford, it's well made.

Thread: Use a router for a mortice lock
31/05/2019 21:44:25

Even with clamped wood support plates the door fitters said drilling can split the surface veneer of engineered timber doors, regardless of whether spiral or spade wood bits are used, I suggested all this as I have that equipment too

31/05/2019 20:03:48

To achieve a period look I routed the apertures for mortise locks (Key centre 3" from edge) and latches (handle centre 6" from edge) for 7 internal doors with a router.
I couldn't find cutters long enough for my 1/2" bit router so I bought one 1/2" shank bit and 2 1/4" bits, turned extension bars on the lathe and bonded the 1/4" shank cutters into the extensions with a locking spot weld for good measure.
The company fitting the doors had suggested using roller latches as their fitters didn't have the means to fit latches this deep in the engineered timber doors which they supplied so I did the job while they hung the doors. 

Cost me the cutters and some lathe time :D 

madecutters.jpg

 

periodlooklocks.jpg

Edited By Nick Hulme on 31/05/2019 20:05:17

Thread: Feeds and Speeds! 0.4mm milling cutters...
29/05/2019 20:07:18

Cutter geometry is required for calculation, if it's 2mm flute length on a 1/8 shank that may not be wide of the mark, it's always a plan to start with 50% of the suggested feed rate as all guides will assume that everything about your machine is ideal for the job.

Thread: Early metal lathes
29/05/2019 19:57:46
Posted by Nicholas Wheeler 1 on 27/05/2019 18:41:59: until you're worthy of preserving a Myford for the next generation.

Done that, it's a 1950s long bed with 30.5mm through capacity headstock and roller bearings :D

I enjoy learning, progressing and achieving, those who don't and instead enjoy repetition of the past, with a given level of technology of their choosing are no less worthy in their enjoyment of that, it's just that some of them seem to think there is a misguided "Purity" in not using newer technology when engineers of the past were all about using the newest technology available, or indeed developing it themselves :D

Thread: Self starting small steam engines
29/05/2019 18:52:40

There are single direction bearings which lock when driving, but turn freely when driven, commonly used for auto-rotate systems in RC helicopters.

Thread: ARC Euro Trade Promo Code
29/05/2019 18:36:44
Posted by Neil Wyatt on 29/05/2019 17:13:09:

I just 'saved' £7 (feels better than admitting I blew £43...)

Neil

Neil,
Surely you can now spend the £7 you saved on something else? :D

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