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Further Adventures with the Sieg KX3 & KX1

A thread for new owners of these machines to post in.

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JasonB20/01/2021 07:23:27
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Apart from when I was adjusting the flow and got a bit too much and sent a bit of swarf flying I was more than happy with how little got spread about and was really no more than may have ended up there anyway.

This is the swarf in the trough and the small amount on the bench next to the machine after doing both sides of one flywheel. I have teed off the air so I can still have the air gun if needed.

20210119_133651[1].jpg

20210119_133659[1].jpg

20210118_133824[1].jpg

20210118_133831[1].jpg

Ian Johnson 113/02/2021 23:17:47
334 forum posts
92 photos

I've not done a lot of CNC work on my KX1 recently, but I am making a little tailstock for the 4th axis, just in case I want to do some gear cutting on a mandrel or something that requires supporting.

This is a little M6 brass thumb screw for the tailstock. I prefer a spline (or grooves) rather than a knurl, I think it looks better and gives better grip.

So if you want a bit of CNC action here's a link to a short YouTube video of machining the splines on the KX1, using my handwritten program for 18 splines. Works quite well!

https://youtu.be/FPoTh36CF54

If the link doesn't work here is a photo instead (with the 4th axis in the background)

splined thumb screw on the kx1 cnc mill.jpg

IanJ

Edited By JasonB on 14/02/2021 07:04:39

JasonB14/02/2021 07:05:19
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Good use of the corner of the cutter, gives a higher cutting speed than a Vee tool.

Ron Laden14/02/2021 07:29:55
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2122 forum posts
425 photos

Ian, I must be missing something but the end mill will cut a 90 degree V wouldn't it but the V,s in the final picture look less than 90..? or at least that's how it looks.

Ron

Zan14/02/2021 10:16:28
213 forum posts
16 photos

Interesting stuff Jason, always fascinating to see your efforts , you are teaching us all so much with your experience. Keep it coming!

how exactly did you align each side of the flywheel when flipping it over? I’m intending to do something similar, and considered a pin in the central bore then another removable one to mate with one face of the 1” dia holes you produced

did you use the “ tool stay down” feature ( can’t remember the exact wording} when doing the initial adaptive clearance?

Ian Johnson 114/02/2021 11:15:48
334 forum posts
92 photos
Posted by Ron Laden on 14/02/2021 07:29:55:

Ian, I must be missing something but the end mill will cut a 90 degree V wouldn't it but the V,s in the final picture look less than 90..? or at least that's how it looks.

Ron

You are right Ron, the V is not perfect, I aligned the cutter edge to 45 degrees from the centre of the job, moved the Y and Z axis equally and was out by a few thou! I think the Z axis zeroed itself, or I pressed zero by mistake and I over corrected the error.

Ron Laden14/02/2021 12:33:57
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Hi Ian

At least I know I,m not seeing things, not that it matters of course the thumb screw looks fine. I like that idea grooves rather than knurling, I need a pair for something thats coming up and I dont have a knurling tool so will give that a go.

Ron

JasonB14/02/2021 16:16:04
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Thanks Zan, if you have a look at my post dated 17th Jan on this page you can see my setup of a piece of crankshaft material held in a collet to locate X&Y, blocks to locate in Z and the last photo shows the mark on the rim which was lined up with a pointer held in the spindle.

Ron, if you have a spotting drill that can also be used as a Vee cutter held vertically above the work's ctr line. Another option is to hold the work with it's axis vertically and plunge down with a small diameter cutter to take out half circles.

Ian Johnson 114/02/2021 16:49:43
334 forum posts
92 photos
Posted by JasonB on 14/02/2021 07:05:19:

Good use of the corner of the cutter, gives a higher cutting speed than a Vee tool.

Thanks Jason I think it produces a decent V shape, but like Ron pointed out it can look a bit 'off' if not set up correctly, it will produce a 'L' shape, although it will still be 90 degrees. I have made a few knobs and wheels with this method, mainly to get used to using the 4th axis.

IanJ

Ron Laden14/02/2021 19:39:23
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2122 forum posts
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Posted by JasonB on 14/02/2021 16:16:04:

Ron, if you have a spotting drill that can also be used as a Vee cutter held vertically above the work's ctr line. Another option is to hold the work with it's axis vertically and plunge down with a small diameter cutter to take out half circles.

Thanks Jason, I do have a couple of spotting drills but never thought of using them as Vee cutters, makes sense when you look at the business end of a spotting drill. It also seems obvious to hold the work vertical and plunge cut the half circles, only thing is it wasnt obvious to me until you told me..lol.

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