Author Topic: Sieg ?  (Read 1517 times)

Stonemull

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Sieg ?
« on: December 20, 2017, 08:43:15 AM »
I was pricing bits to make an aluminium capable mill, still no idea, tossing up c-beam, sbr16, sbr20 etc etc.. looking like not much going to happen under $1000 in reality .. bits add up.

Then I saw these on ebay https://www.ebay.com.au/itm/Sieg-X2-Variable-Speed-Dovetail-Milling-Drilling-Machine-Mill-Drill/391945151546?hash=item5b41c0643a:g:rckAAOxyVaBStM0B

These sieg machines are rebranded as lots of others, including harbor freight, so now I am wondering how hard it would be to add some nema23's to something like this instead, might need gearing down but so what, pretty easy to come up with something I reckon.
One thing that has me wondering .. backlash, I see the fine Z axis winder on the front has half a turn of backlash before it engages the coarse spindle.

couple of example videos in action https://www.youtube.com/watch?v=II_1xK_6m34

and oh .. here is one converted to CNC .. https://www.youtube.com/watch?v=Ve43EJHYGNo

and one doing 1/4 steel plate with CNC https://www.youtube.com/watch?v=VHw0cG5EzG8

comment by uploader
Quote
Exactly, I have not using a chuck, just a end mill holder made by my self, you know, to convert the X2 machine is very easy and not so expensive, have good kits on market like little machine shop.

ok, looking for sieg x2 cnc turns up like this kit http://www.cncfusion.com/minimill1.html
which is nearly as exxy as the mill and includes new ballscrews .. but not the motors or mounts, damn. I still wonder if its doable without exxy added bits.

found a thread with a dude doing a conversion https://forum.ausrocketry.com//viewtopic.php?t=4002

So .. what ya reckon.
Can you see disadvantages of going this route ?


edit: forgot to mention this guy too .. https://www.ebay.com.au/itm/Sieg-M1-Vari-Spd-Multi-Function-Metal-Lathe-Milling-Drilling-Mill-Drill-Machine/382310729057?hash=item59037ec561:m:mz2H6T9xW4O7N3dZ2DdK0ww

combo lathe mill, dunno, might do neither well ..






« Last Edit: December 20, 2017, 08:52:24 AM by Stonemull »
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ThothLoki

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Re: Sieg ?
« Reply #1 on: December 20, 2017, 09:07:10 AM »
Talk to danowar. He converted a mill like this to CNC this summer. Installed some nema23 motors on it and 3D printed some brackets. I saw some videos and it looks like a nice little machine.
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ThothLoki

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Re: Sieg ?
« Reply #2 on: December 20, 2017, 06:32:20 PM »
Hey Stoney. Openbuilds is having a sale on their mini mill
http://openbuildspartstore.com/openbuilds-minimill-sale/?mc_cid=b336c65a65&mc_eid=a3cbdf3871
Free motor upgrades and free shipping
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Stonemull

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Re: Sieg ?
« Reply #3 on: December 20, 2017, 07:16:40 PM »
I got the email on that too, that is actually what started me hunting for parts, free shipping within the US, with motors this is still more expensive without delivery than the Sieg X2. That is what got me thinking .. ok it can do thin aluminium, slowly .. I would rather have one that can do steel if required. I could then use it to make brackets and stuff and make me own little mill :)

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Stonemull

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Re: Sieg ?
« Reply #4 on: December 20, 2017, 08:07:38 PM »
Bought the Sieg
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Stonemull

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Re: Sieg ?
« Reply #5 on: January 16, 2018, 02:08:11 AM »
Yay, it arrived .. only have limited tooling currently, my largest end mill is 6mm, plus the mill only comes with 2 T-nuts and no bolts to screw into them, so I bolted my drill press vice to the thing and got my feet wet on a piece of aluminium I melted into a muffin tray some time back.
Will be looking at automating it soonish, will need some experiments. It seems backlash on the X and Y slides are not as bad as I expected,  will be ordering a bunch of new stuff I guess, dial indicators, clamps etc etc..

Just checked basic backlash by lightly clamping my digital verniers in the vice, X is an astounding 0.01mm and Y a fair bit worse at 0.14mm.
Not bad straight from the crate though, now going to read the manual..

« Last Edit: January 16, 2018, 02:08:48 AM by Stonemull »
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Re: Sieg ?
« Reply #6 on: January 16, 2018, 08:30:21 AM »
Very nice! I just bought a Harbor Freight 7x12 Mini-Lathe!

I'm in the tear down and rebuild phase (which you *should* do with any new mini-lathe). Putting them back together will allow you to setup/tune the slides for maximum precision possible with these little machines.

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ggallant571

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Re: Sieg ?
« Reply #7 on: January 16, 2018, 09:00:57 AM »
When do you think you will have BCL ported to control the lathe? Mount the laser on the power feed.
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Re: Sieg ?
« Reply #8 on: January 16, 2018, 09:07:22 AM »
When do you think you will have BCL ported to control the lathe? Mount the laser on the power feed.

No plans to do that.
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Stonemull

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Re: Sieg ?
« Reply #9 on: January 16, 2018, 09:57:50 AM »
I will pull it down soonish, it seems pretty well setup atm though and I wanted to get some data first so if I reassemble and its not as good, I know I can make it betterer if you know what I mean  :)
Will probably wait till I have a dial indicator to start with, really need some gauge blocks, surface plate, scrapers and prussian blue to really tune one.
Used some luggage scales to roughly check torque on the X and Y axii just tugging on the handle, around 600g on the X and up to 2kg Y, handle is about 35mm from axle so I reckon even a nema 17 could spin it geared down 5:1 or something. Plan is to get some nema 23's ultimately.
I have some 150mm loop belts and 16T pulleys and a couple of larger ones, 64T?, thought I might have a muck around with nema 17's first.
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