Sieg KX3 or Optimum BF20? Need advice, please.

[anlmat]

Hello!

I am looking into buying a cnc milling machine and I have read many forums and data sheets to try and get the most for my money. I am new to milling. And new to CNCzone.com!

Is there a difference in performance between a ready made cnc machine like the KX3 and between a factory cnc converted BF20? (There is a German dealer who can make the cnc conversion when buying a new BF20/BF30/BF46 machine from them. I don't want to do the conversion myself.)

What I am also trying to figure out is if there is some "magic" going on in the ready made cnc machines that the converted ones don't have? Once converted they should basically be able to do the same things right?

I see that many ready made cnc machines have this "one-shot lubrication" systems. Do you need something like that for the BF20?

BF20L pros:
Large table and X-travel.

KX3 pros:
5000rpm and the price.

Price list:

The BFXX are all CNC converted and assembled.
BF20L (CNC kit with ballscrews + stand) ~6100 euro. ($8300)
BF30 Vario (CNC kit with ballscrews + stand) ~8500 euro. ($11500)
BF46 Vario (CNC kit with ballscrews + stand) ~10000 euro. ($13500)

KX1 with stand ~3300 euro. ($4500)
KX3 with stand ~4600 euro. ($6200)

Thank you!

/anlmat

[arizonavideo]

The cost to CNC all but the BF-46 if you did it yourself would be about $1500 or less.

The machines cost about $1000 to $2000.

I don't see the conversion being worth $4000 but perhaps you do.

You also have a vary wide range of machines. From 200 to 900 pounds. The smallest machine I would get is the BF-20. You may not need or want the larger BF-46.

I have a Weiss 30 and vary happy with it and it cost about $1600. I could CNC it for about $650 with rolled ball screws and steppers.

[anlmat]

Hello,

If I remember correctly the German dealer wants 3190 euro for the cnc-kit including assembly and another 1650 euro for the ballscrews including assembly.

These following BF46 from the optimum homepage.

The cnc-kit details:

Complete set consisting of:
· 1 x controller IV "high power"
· 3 x control card "high power"
· 1 x reference switch
· 1 x add-on kit MK F46DP

CNC add-on kit MK F46DP
Step motors with integrated terminal board
Especially smooth running due to little self resonance
IP 54 enclosed motor protected against water and chips
Extended axle shaft · 400 steps per rotation
Toothed belt of HTD type (High Tork Drive) by Gates

· Incl. Mounting (without Software)

2890 euro + vat.

Komplettsatz Kugelumlaufspindeln BF46 Vario
3 x Kugelumlaufspindeln Ø 25 mm mit Mutter
Montagesatz Kugelumlaufspindel für alle drei Achsen

1590 euro + vat.



The only difference is that the other German dealer will build/assemble the whole thing for me. I must be missing something. Do you mean that parts are too expensive? Should I not buy them from Optimum?


Will the BF20/30/46 be just as good at CNC'ing as the KX3?

/anlmat