New Machine Build- What kits shoud i used

[ali12]

Hi all
I am going 3 Axis building a CNC router machine 4'x8' to and I need suggesting about the controllers and stepper motors
I need the fell cnc kits and where to buy then.
thank for all.

[DIYaholic]

As I have not built a machine yet, I can not offer suggestions for your electronics and motors. However, for others to be able to help you, more information is needed:
1. What is the design of you machine?
2. How large is your machine?
3. What is your machine used for? (routing PCB's, carving wood, milling aluminum, machining steel)
4. What tolerances, speeds are acceptable?

I'm sure others will help, if they have the right amount of information. Good luck with your quest.

[flyinwilly]

I also have not built a CNC machine (yet). All of the plasma work I have done is freehand but the time has come to expand my horizons. I think I have read every post on this and every other forum concerning motors, drivers, BOB, PSU, etc. The more I read, the more confusing it gets. Time to put a stake in the ground and buy something.

I plan on modifying my downdraft, water table to CNC. The table is 3' by 4'. With this size, I can probably get by with 270-325 OZ motors and corresponding drivers. However, it will be used 3-4 hours per day so I am going to err on the safety side and go larger (slight overkill).

I would love to go with Gecko drives (203V) but my budget is getting strained. I have been looking at the Keling equipment. He has very good prices on motors and drivers. The one concerning difference is that his drivers do nothing for mid range resonance of the steppers. However, since I usually nest many parts on a sheet and don't think I'll be doing a lot of rapids, I can probably get by with mechanical damping.

With that being said, I plan on using the KL-6056 driver(5.6A peak), 425 OZ steppers, C10 BOB, 36 or 48 V PSU (not decided yet). Keling has quoted a price of $475 which is pretty good. It's only $379 for the 4030 drivers( 3.0A peak).

I know if I keep looking at this stuff, I'll probably change my mind (Again).

That's my thoughts so good luck with your project,

Willy

[phomann]

Hi,

You need to do your sums on what motor sizes you need, then work backwards from their.

If you only need size 23 motors around 400 oz-in or less then consider the Geckodrive G540. It is a complete 4 axis micro stepper driver system that is capable of delivering 3.5A/ph and will work up to 50V.

I have put together a package of the bits required to put a G540 based system together.

http://homanndesigns.com/store/index...products_id=90

Cheers,

Peter.

[ali12]

Thank for all reply

I need the machine for carving wood on 3/4' mdf plywood and normal wood and the size is 4feet by 8feet

I need the full kits and 3 stopper motor and where to buy them together a package for my new machine 4'x8'
What is the different between the KL 6056 and G540 and witch is good for my new machine

Regard
Ali12

[flyinwilly]

From the info that I've gotten from various web sites and these forums, the G540 is a pretty nice unit. It's main limit is that the maximum phase current is 3.5A. If your motors meet it's requirements, then it looks to be a great unit. The 540 is a one stop box. It has the breakout board built in and has one major feature lacking in other drives, mid range resonance damping. Also, Gecko has the best reputation for quality and service in the home CNC market.

Keling seems to have pretty nice equipment also. It's almost certainly made in China but what isn't these days. The main advantages to the 5056 is the higher current rating and separate units for each axis. Less chance of a single failure wiping you out. The downside is you need a separate BOB, additional 5V PSU, and it doesn't have resonance damping.

The Keling website (www.Kelinginc.com) sells both units and you can get the documentation on each. They also give a slight discount on the 540.

From everything I've been able to gather, you must choose your motors first and everything else will follow.

Good Luck,

Willy

[ger21]

I need the machine for carving wood on 3/4' mdf plywood and normal wood and the size is 4feet by 8feet

You need to determine how you will drive the machine (screws?, rack and pinion?), then how fast you want to go and how much force you need to determine what motors and drives you'll need.

Otherwise you're just guessing and what you buy may or may not work.

[Mike Ray]

Take look at the MechMate

http://www.mechmate.com

Great plans (Free of course) and all the info you need to build the machine online.