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Member postings for Ian Johnson 1

Here is a list of all the postings Ian Johnson 1 has made in our forums. Click on a thread name to jump to the thread.

Thread: Vectric Vcarve upgrade to 10.5
09/07/2020 18:49:41

I use Vectric Vcarve desktop for programming jobs on my Sieg KX1 mill, and last night I upgraded to the latest version 10.5, free of charge, which was nice.

Amongst the new upgrades is the facility to thread mill which I have never done before. Some of you may use Fusion 360 and the like which has the capability, but this is new territory for me.

So my questions are: has anyone done thread milling on the KX1 (or KX3)? Any tips? Which program did you use? If it was Vectric Vcarve that would be a bonus!

Ian J

Thread: Message from the prime minister
07/07/2020 17:30:23

20190315_145522.jpg

Thread: Lamp Post Engine
05/07/2020 14:47:22

Very nice, a good looking model. Well done yes

IanJ

Thread: What Did You Do Today 2020
05/07/2020 12:52:33
Posted by Bazyle on 05/07/2020 11:57:20:

Why not make a knew nob for the old one? cheeky

Aha! Good idea! But then all the other pieces would look rubbish and for the next 20 years I would be looking at them wishing I had made something that looked pretty laugh

04/07/2020 23:57:56

Yep I agree, I'll leave them blingy! Good job my workshop is relatively rust free!

04/07/2020 19:56:57

Have you ever made something for your workshop which took half an hour to make, and looks as rough as a bears backside, and then used it for years and years? I made a clamp for a small surface gauge/pointer

This is the old clamp. I made this for a small magnetic base out of a scrap piece of brass, a 1/4" unc bolt and a mystery knurled nut from somewhere. Using a file, a junior hacksaw and a hand drill. Works okay but It is sloppy and rough. I use it regularly on the manual mill, because I don't have digital read out, it comes in handy to remember where my datum points are.

pointer holder old img_4883.jpg

The day finally came when I just had to make a new one. One that looked pretty and worked like it should do. So I found a piece of 3/8" x 3/4" mild steel bar for the main body, and used silver steel for the nut, sleeve and bolt.

This is the new one. I prefer straight flutes for the grippy bit, I think they look better than a knurl, this was done with a handwritten program for 18 flutes on my KX1 CNC.

pointer holder img_4882.jpg

I think this new one will last just as long as the old one, and is much nicer to use. Just mulling over whether to chemically blacken the pieces or leave them blingy?

IanJ

Thread: 2mm endmill help
24/06/2020 22:17:10

Hi Dave I've got a Sieg KX1 CNC and tend to cut steel like it's made of kryptonite! So I usually take it easy and slow until I am confident with the progress. For a 2mm cutter I would start out like you, but at 20% or less of 100mm / min at about 3000 rpm, tweaking the feed rate and rpm as the job progresses. Depth of cut sounds about right. The KX1 max speed is 7000 rpm which I very rarely use, 10-15,000 revs seems a bit too high, could be causing vibration.

Having said all the above I find recommended feeds and speeds to be totally irrelevant and meaningless, and i ignore them, because in the home workshop it all depends on the machine, rigidity, quality of tooling and material. Just go with what feels and sounds right for you. If it's wrong the machine will quickly tell you!

IanJ

Thread: Artistic hand cut oilways
24/06/2020 09:46:37

I don't think it matters too much what shape the oilways are as long as the oil is distributed on the surfaces.

An Icthys! I never thought a boat would need divine support, I thought that was what the water did frown

Thread: Further Adventures with the Sieg KX3 & KX1
24/06/2020 09:42:48

Thanks for the F360 explanation Jason it looks more advanced than Vcarve

IanJ

Thread: Artistic hand cut oilways
24/06/2020 00:04:35
Posted by Mark Rand on 23/06/2020 22:50:06:

We don't teach children and youfs to use chisels anymore. We should do!

Maybe we should have a competition for the most artistic hand cut oil ways?

I've seen a couple of youtube videos where people have spent ages meticulously setting up top slides on the mill to machine precise oilways, when it would have been a lot quicker to get the bullnose chisel out and cut some curvy grooves, it will achieve the same result.

23/06/2020 23:48:12

People are having a whale of a time here with some great fishy puns but cod do better cheeky

Thread: Further Adventures with the Sieg KX3 & KX1
23/06/2020 23:04:47

Nice work Jason, a difficult shape made for CNC. I'm not familiar with F360 you say it defaults to centre, is it the same as Vectric Vcarve? I tell the program where to start from in the job set up and dimensions (usually the centre of the job or one corner). I can use an offset start position too.

IanJ

Thread: Artistic hand cut oilways
23/06/2020 22:19:59

I thought there was something fishy about it!laugh

23/06/2020 20:18:44

I'm helping to refurbish two very old steam engines on a 1903 coal fired steam tug boat, and when we stripped the starboard pump down I couldn't help but to be impressed with the hand cut oilways.

20200623_104302.jpg

So let your creative juices flow when cutting your oilways, they don't have to be straight!

IanJ

Thread: 2020 Stevenson Trophy Competition
13/06/2020 15:06:53

Thanks Neil for bumping this thread back up.

IanJ

Thread: Workshop Photography Competition
13/06/2020 11:12:24

Slightly off topic

Neil are entries into the john Stevenson trophy still open? I had a quick search on the forum but couldn't find any reference to it.

IanJ

Thread: HobbyMat Lathe
04/06/2020 13:19:26

Looks like you are also missing the dog clutch which is a keyed sliding fit on the end of the leadscrew. The collar pin could be broken too which would account for the excess play.

Here's a bad photo of my MD65 if it helps?

IanJ

20200604_100007.jpg

Thread: Sharpening Files
13/05/2020 15:11:15

Try sand blasting them!

Company I used to work for did this to old files and gave them a second life. I think it was more to do with keeping a tight hold on finances! When they found some money they bought new files.

IanJ

Thread: Further Adventures with the Sieg KX3 & KX1
07/05/2020 21:34:23

Thanks Jason and yes the little Sieg CNC mills are great, I am still finding out the limits of the KX1, and this was just approaching the outer profile max at about 93mm diameter on the Y axis. I was getting a lot of chatter on the cuts especially on the deep last pass, I think the spindle bearings need nipping up? I shall investigate further. But otherwise the machine is performing great.

I was going to powder coat it but chickened out when I thought the glue holding the magnets and steel bar would melt, so I used car spray paint.

IanJ

07/05/2020 20:13:16

I needed to make a new cup holder for my partner's new electric wheelchair, the previous cupholder would not fit, and anyway, I fancied using my KX1. CNC'ing the main shape.

Vectric V carve made a good job of working out the tool paths. I used a 6mm end mill for both the pocket and outer profile. Taking it steady with 2mm deep cuts in the 10mm deep pocket, and the same with the profile which was 12mm deep.

20200430_192342.jpg

I included 5mm wide tabs, but put two of them where all the material was cut away!! No harm done it all held together okay.

20200501_194013.jpg

The other parts were done on the manual mill and lathe, producing the hinge bracket, backing flange and M4 pivot screw.

I glued strong magnets into the bracket and a mild steel bar into the main body. Worked out nicely.

20200506_194957.jpg

Painting is not my favourite job but the black matches the wheelchair.

20200507_114557.jpg

20200507_161014.jpg

Just got to wait until we can get out and road test it now!

Ian J

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