CNC my X2 (electronics/motors config questions)

[makeparts]

hey folks - I have read thru a ton of posts on this, and I BELIEVE I have a good list of electronics to 4 axis CNC an X2...

I do have some open questions, so I was hoping to get some of you that are clearly so knowledgeable and have already gone down this path, to answer them, so thanks in advance to anybody willing to drop some knowledge here!

(I am working the linear motion upgrades separately)

I'll run Mach3 to control it (I want to cut some bevel gears and small 3D items, such as small fan/rotor type blades)

this stuff is mostly from Keling - I may source elsehere, I just want to confirm that I'm not taking crazy pills...

> 3 270oz stepper motor (3A x 3 =9A) (X, Y, A-axes)
> 1 381oz stepper motor ( 3.5Aa) (Z-axis)
> 1 48v/12.5a pwr sup
> 1 case w/ estop
> 4 4042D controller
> 1 Ethernet Smoother Stepper
> 1 what cables??? (I need to do more research here)
> 1 c11 BOB for spindle, relay controller
> 1 5vDC power supply (what is pin out, amperage rating?
> 1 mpg2 pendant controller
> 1 c22 using LPT2 port



1) should I go with a bigger power supply?
2) any ideas on a case - just use an old Computer case?
3) do I need to add any separate cooling fans to the case?
4) what small parts do I need? (i.e, anything, like a
connector for the MPG for example?)

I also want to be able to add interface control in the future for:

1) power drawbar
2) ATC
3) coolant pump
4) (and maybe air blowing)
5) home/limit switches

did I miss anything glaring to anybody?

[steamboatmodel]

I don't know if you missed anything or not, but I will be following your thread as I just picked up a new X2.
Regards,
Gerald.

[hoss2006]

You've got some good choices there, most go with the g540 but the 4042d digital
drivers should work well.
You might want to compare all you get with a g540 vs (4) 4042d's as far as features for the $ first.
You don't need a bigger power supply.
PC cases are common cheap first enclosures.
An extra fan or 2 is a good idea.
Depends on what pendant you get, many are just usb.
Good luck, Hoss

[makeparts]

Thanks for chiming in Hoss - I'll do just that...

I've just discussed this with a colleague - we may actually pony up for an SX3, so I'll do that research and post that config in the appropriate forum...

Gerald - sounds good man - I dig the fact this technology has become good enough/affordable so that it's catching on...best of luck to you

[makeparts]

You've got some good choices there, most go with the g540 but the 4042d digital
drivers should work well.
You might want to compare all you get with a g540 vs (4) 4042d's as far as features for the $ first.
You don't need a bigger power supply.
PC cases are common cheap first enclosures.
An extra fan or 2 is a good idea.
Depends on what pendant you get, many are just usb.
Good luck, Hoss

Hey experts/experienced ones - got a question for you all: I have selected the 270 Oz/ 381 Oz motors (X-Y-A, Z axes) , driven by 4042D's...

I like this, as from everyone I have spoken with seems to think that this gear, will be driven at appropriate speeds & loads (within intended design criteria)...

It seems that a lot of folks go bigger, such as using those motors with 5056D's, or by going with those drivers and larger motors...

I might cut the odd piece of steel, but it will by and large be delrin and lighter alloys...speed is not high on the priority list...learning the best way to build operations and fixturing for our prototypes IS...

my investigation does not point to the need for any of that larger, more powerful gear

am I missing something?

[mhackney]

makeparts, having done both an X2 with a G540 and just wrapping up a G0704 with a BOB, individual drivers, a motor control card, etc I can say that a system built up with a G540 is SOOOO much simpler! Very minimal wiring, nice clean control box, and no headaches. On my G0704, just laying out where to put 4 drivers (and I'll need to add a 5th for my ATC) in the box with a BOB and motor speed control, separate 5 volt power supply for the BOB was a challenge!

I cut a lot of Delrin, aluminum and brass with small (1/16 to 1/8" and smaller) bits on my X2 and made l000s of parts for my fishing reel kit business. It has been rock solid, reliable and no fuss.

I think folks go bigger thinking they may reuse motors on another mill someday, got a good deal on ebay, or whatever. I personally don't think bigger is better. I have had no problems milling steel with my X2 when needed. The biggest factor there was rigidity - do a Z column brace of some sort (you can read about mine and others here). I did the milling required for my G0704 conversion on my X2.

If there were a big brother for the G540 for these bigger mills I would have not blinked an eye to use it!

cheers,
Michael

[makeparts]

makeparts, having done both an X2 with a G540 and just wrapping up a G0704 with a BOB, individual drivers, a motor control card, etc I can say that a system built up with a G540 is SOOOO much simpler! Very minimal wiring, nice clean control box, and no headaches. On my G0704, just laying out where to put 4 drivers (and I'll need to add a 5th for my ATC) in the box with a BOB and motor speed control, separate 5 volt power supply for the BOB was a challenge!

I cut a lot of Delrin, aluminum and brass with small (1/16 to 1/8" and smaller) bits on my X2 and made l000s of parts for my fishing reel kit business. It has been rock solid, reliable and no fuss.

I think folks go bigger thinking they may reuse motors on another mill someday, got a good deal on ebay, or whatever. I personally don't think bigger is better. I have had no problems milling steel with my X2 when needed. The biggest factor there was rigidity - do a Z column brace of some sort (you can read about mine and others here). I did the milling required for my G0704 conversion on my X2.

If there were a big brother for the G540 for these bigger mills I would have not blinked an eye to use it!

cheers,
Michael

Hey Michael - thanks for the input...I'm not daunted with the electronics, and I have a stud resource (my brother is an ECE - that's both hardware and software engineeering) to fall back on. I've heard good things about digital drivers, so the leap of faith occurs...

I have followed some of your thread/posts - good stuff man

FYI I am a fly fisherman - love the application you have!

[mhackney]

Thanks make parts and welcome to another brother of the angle!

I considered the digital drivers on my G0704 but they were still pretty new at the time I bought the electronics. Since these are production machines, I need reasonably proven reliability. I think the digitals have enough time now that they are a great option. I'll use them on my next machine! Probably a home brewed 3 axis BIG router for milling 4' x 4' sheets of aluminum and brass.

cheers,
Michael

[dia260z]

Hey Guys, how does a 48V power supply work well with a 40V max driver?...been trying to figure out this for a while.
"1 48v/12.5a pwr sup.... 4042D controller"

Thanks for any input!

[minimum]

Hey Guys, how does a 48V power supply work well with a 40V max driver?

Short answer is: no!
Overvoltage either triggers the protection (if the drive has it) or destroys it.

From the motor choice: datasheets show smaller inductance for 381oz motor. I would prefer those over 270oz motors.

Keling has great deal on kits.

[hoss2006]

Hey Guys, how does a 48V power supply work well with a 40V max driver?...been trying to figure out this for a while.
"1 48v/12.5a pwr sup.... 4042D controller"

Thanks for any input!

The specs for the 4042D say to use an input voltage between 20-40 VDC but if you read farther down in the data sheet
it says the over voltage protection won't kick in till the input voltage exceeds 50 VDC.
These power supplies have pots that allow the output voltage to be adjusted.
I'd set it to 40 but 45 should be fine.
Hoss

[dia260z]

Thanks guys!