Advice sought on new Mill build

[Blackrat]

how are you going to weld the inner section "the +" to the outer square section ?

[Boyan Silyavski]

how are you going to weld the inner section "the +" to the outer square section ?

very simple:


-if using big plates, first weld the core, then the 2 opposite plates, then drill every ...mm the plates and weld through the hole filling the hole with the mig. I have done it already on several occasions and works.




-but what actually i would do is use 100x10 plates, as together with the 100x100x4 profile they are available anywhere in the world and easy to cut with small band saws or dry circular saws. Which saves money. Say here in Spain steel is 0.95eur/kg if you buy from provider by the 6m, what i do. You go and buy it cut to size and they charge you 2eur/kg and some times even extra for the time they cut. Thats why i bought the circular saw, cause obviously on my build right now/ 500kg/ it saved me at least 500euro.

First weld the core, then form angle plates, then weld them to the core, then weld the final plates. Yeah, it would require some patience, careful welding and so, but a successfull build definitely requires these qualities.




depends from the method obviously the dimensions will vary a bit.

[embraced]

Great contribution silyavski.

This is the spindle i'll be using: http://www.aliexpress.com/item/High-...004506503.html

This is the spindle tool release mechanism i'll be using:


This is the motor i'll be using: http://www.aliexpress.com/item/Spind...849189611.html

The motor has limited information on it, so i contacted the seller directly and got the following graph for it:


Not purchasing the items from the sellers listed (except for the motor).

Prices: Spindle is 755USD, tool release mechanism is 200USD
2.2Kw motor and driver is 1210USD.

[Boyan Silyavski]

About the motor.
I don't know how realistic that could be. The data i mean and if it could serve well. Somebody has already tried it? For that purpose? Do your research there. Dont believe what chinese sellers say, cause mostly they don't know a sh*t about what they sell.

I would believe a similar Panasonic one/ what seemed the right one to me, look at the description/ would be jump in the known, not the unknown. Or just search more to find something more suitable for what you want, brand name.

Ask the seller of the spindle if he knows of a suitable motor. Ask linearmotionbearing , bstautomation and any other seller who seems credible and then decide.

[embraced]

The seller is an OEM manufacturer for machines in China. They manufacture the motor. The same motor is used in many chinese VMC's.

It is not a normal servo anyway. it's an asynchronous servo with forced air cooling. All the real machines have these.
This type motor was recommended by the spindle supplier i might add.

The Panasonic servo you've linked is an axis servo. Not designed to power a spindle.

Also, linear & BST automation don't supply these motors. Their existence is not well known among hobbyists, and they're expensive to boot.

[embraced]

This is the motor manufacturer's website.

http://www.sotengcnc.com/cncsystemsltd-product.html

I have contacted them on many occasions and they certainly do know what they're talking about. They were even able to tell me which EMC standards their drivers passed.

[Boyan Silyavski]

That's good to know. Cause what i hate most is looking at manual in Chinese and nobody to ask for help in English.


Myself and believe others would be very grateful if you continue your build log here with details and so. i would especially appreciate if you share in the future the CAD drawing of the head assembly with the motor, spindle and tool release mechanism. This could save many hours of research and drawing.

[embraced]

Yes, everything will be documented here.

I have found a VMC frame from China that seems to be around my specifications
http://www.alibaba.com/product-detai...904489677.html

The seller I have contacted (not the one above) will sell the frame my itself.
The 'Frame' includes the Spindle, HIWIN guides, P3 ballscrews, auto lubrication system and way covers for 7300USD. the ATC is a 1700USD option.

I have given some thought to either:

• Making a fabricated steel clone of the machine above
• Buying the frame and doing the electronics (not a creative project at all)
• Sticking to my initial idea and doing the entire thing from scratch.

The first option is likely to be the cheapest.
The second option is definitely going to be the easiest and quickest, but the least satisfying.
The last option is one that has the least probability of success, but the most satisfying.


Thoughts?