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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: Presumably this is done using CNC... but even so its impressive
23/04/2019 17:11:58

Even so?
That would be because you know what's involved in learning CAD/CAM/CNC and actually making precision parts and have achieved this, since it is obviously simpler than what you do?
dont know

Thread: Cheap DRO for Mill
20/04/2019 10:21:49

Cheap scales don't give you the basics for a DRO on a Mill, if you don't have multiple zeros then you don't have a DRO and you might think it's great because you will simply not understand the advantages to having multiple zero points in 3 axes.

Thread: Does anyone know where I can source a Myford 34t change gear?
19/04/2019 20:30:30
Posted by JasonB on 19/04/2019 13:02:21:

Like most other off the shelf gears HPC and Daval do 20pa not 14.5pa.

I've cut my own with off the shelf cutters, presumably the pressure angle for those didn't match either.
But they work perfectly well and since model engineers are so blase about variation metric pitches........ :D

Thread: Simple and accurate home "switch"
17/04/2019 18:24:15

A pair of proximity switches in series with on the linear movement and one on the screw driving the linear way would give excellent positional repeatability and long service life.

Thread: stepper driver
16/04/2019 11:00:24
Posted by SillyOldDuffer on 15/04/2019 21:21:57:

Oh dear, why is nothing ever easy...

Dave

Things can be easy, it's just that things are rarely Cheap AND Easy! wink

Thread: Hemingway spindle speed increaser
04/04/2019 15:02:46

My FB-2 will run in reverse, great for reversing out taps etc. but since the oil pump is a helical screw connected to the motor shaft you wouldn't want to run it in reverse for any length of time.

I built a belt drive speed increaser for engraving and micro-machining, it cost me an afternoon and about £15.

Thread: Knurling speed
03/04/2019 17:40:02

John Stevenson once proved, by knurling a taper, that calculation for formed knurling is not required for adequate engineers

03/04/2019 17:37:28
Posted by John MC on 03/04/2019 07:53:06:

I was going to start this post suggesting that knurling doesn't produce swarf, coolant would help the metal "move" under the influence of the knurls. In reality I find that debris is created and needs washing away.

Could this be due to not bothering to calculate the diameter of the work piece to suit the pitch of the knurl?

I've never bothered to calculate the diameter and always get an entirely satisfactory knurl.....

As for speed, on a small lathe I would reduce speed quite a lot to make sure there is sufficient torque, the forces in knurling seem quite high.

I have a larger lathe, plenty of power, I always reduce the speed to knurl because it seems kinder to the knurls.

John

No, it's caused by knurling a material which can not cold flow as far as would be required for a full knurl.

Thread: New Toy
02/04/2019 16:34:29

Yeah, it's a shame they went through that learning process, I'm pleased to say that my X7 is as square as my DTI is able to detect and is astoundingly rigid, it almost puts the wind up you the speed it shifts material! :D

Thread: Soft Feel Finish on Radio
02/04/2019 16:22:22

Acetone cleans it off quite quickly although might affect the base material - always do your test patch!

Thread: New Toy
28/03/2019 10:57:50

I must mention George at Emvio Engineering who is the UK importer for Syil, George has been an absolute treasure throughout the process, from enquiry right through to commissioning, his support and assistance is brilliant and has really helped to smooth the process right up to the first cuts under CNC control.

Edited By Nick Hulme on 28/03/2019 10:58:05

27/03/2019 13:22:47

This video gives a hint of what the Syil X7 is capable, here it's cutting a 3mm deep pocket in 316, entry was spiral then full 3mm DOC using a 10mm 4 flute carbide roughing endmill with 33% step over at 1170rpm and 126 mm/min with very reasonable noise levels, the mill noise was not noticeable above the background noise outside my workshop.

https://youtu.be/SvzSgXN-YW4

Edited By JasonB on 27/03/2019 13:28:10

Thread: Wazer
15/03/2019 23:56:35
Posted by mgnbuk on 14/03/2019 09:01:39:

I'm not sure I would want that technology in the garage.

If you're the kinda guy to stick you hand in the working area you're definitely best off without.

Consider that a Pressure Washer presents most of the same dangers to the hard of thinking without any of the safeties!

Thread: New Toy
12/03/2019 09:52:26

Although I did look at Tormach and Skyfire at the start of this journey I don't think the X7 is intended as competition for either, the X7 is far more rigid and massive and has a base casting, not a stand.

syilx7casting01.jpg

It is my personal machine and will be used for motorcycle parts for me but I will be doing some commercial work with it, the commercial stuff is covered by NDAs so I'm not at liberty to give details without the permission of the IP owners until the products are released into the UK market.

11/03/2019 13:13:44

It's the Syil X7 with 12 tool changer, the big 4th (that's the hand wheel on the tailstock!) , Siemens 808d Advanced controller and Siemens servos and drives, the factory were very kind in including the laser ballscrew mapping at no extra charge.
The massive column and base castings were a significant part of the appeal of the X7, the absence of proprietary gubbins you can't buy elsewhere was also a consideration.
I've had my nose to the grindstone replacing the shower enclosure at the behest of SWMBO this weekend and this morning, back to work on the garage today! :D

10/03/2019 09:33:11

That's it in position, just the complete rewire of the workshop to do, the cable trays are going in next week :D

syilx7inplaceandlevel.jpg

Thread: Metal ball joints for 1/3 scale action figure?
10/03/2019 09:21:34

It's worth looking at how the original Action Man figures joints were articulated, with a combination of hinges and swivels they give realistic articulation with lass complexity than ball joints.

Thread: Sizing an M2 thread during screwcutting
27/02/2019 08:33:57

I'd go with a set of M2 chasers for one of my die heads.

Thread: Carbide inserts again.
27/02/2019 08:31:08

If you cut away from the shoulder there are no worries about speed.

Thread: Myford cross slide backlash
20/02/2019 09:43:50

You can use thrust bearings to eliminate any backlash from the adjusting collar system, you do need to machine the cross slide end plate casting to accommodate the bearings though.

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