Winter Project X2 CNC conversion

[Crevice Reamer]

Originally Posted by escott76 a) Bigger isn't always better b) It's primarily to do with the inductance number. You choose a supply voltage based on the inductance of the motor (32*sqrt(inductance)). The 387 wants a higher voltage than you can feed through the G540 to meet this rule, the 381 will do better on the same voltage. At the max voltage of the G540, the 381 will produce more torque. Not to say at all that the 387 is a bad match for the G540, I currently run 4 of them on mine, but the 381's weren't available when I bought them, or I would have chosen them.

The 381 is definitely the better choice--But it won't give you more torque than the 387, that is controlled by the Amps and both the 381 and 387 will supply their rated torque with the G540.

The 381 however, with it's lower inductance, WILL run a little faster.

CR.

[ZOB]

Well I received packages from Keling and CnC Fusion. Everything arrived in good shape.

I wired up my steppers and G540 ,cranked up mach3 loaded the road runner and the motors were spinning. I've read the Gecko file on heat sink tests, My Gecko got to 160 def F ( they had 180 f max ) So I will definitely get a fan on it after I build an enclosure , My steppers got up to 150 deg f . Is this normal?
how hot can they get before damage occurs? I used 3.4k resistors and the steppers are rated for 3.5 amp.

Will start installing the CnC Fusion kit next.

[ZOB]

Started Installing the CNC Fusion Kit , found a few challenges to tackle,
the Y axis ball shaft would interfere with the base so I ground it a bit to obtain clearance, Easy enough. Also found that the X axis Lovejoy would interfere with the Y axis block , So I clearanced it also and now I have full travel on the X axis.

I also Started modeling the X2 up since I have it tore apart, should prove handy when it comes to making up limit switch brackets later on.

[SScnc]

I remember when I installed the CNCFusion kit on my X2 I had to do a fair amount of grinding on the bottom of the X table but I don't think I had to do any on the Y. But I did have to grind the base for the Y ballscrew just like you did. Another thing you might think about is modifying the Y motor mount to provide more Y travel, it's easy and man, with out the extra travel I wouldn't be able to do much useful milling with mine.

Great modeling work !

[Teyber12]

great work!

I have never measured my steppers temp, but when its doing a lot of work i often cannot put my hands on it. 150f sounds hot but not too hot.

cheers

[tumutbound]

To quote from the gecko FAQ:

Q.) How hot is too hot for a step motor?
A.) The maximum heat for most steppers is around 100ºC (212ºF), but it is generally never good to have the motor heat go above 85ºC (185ºF).

[eartaker]

very nice... might as well go ahead and add onto the X and Y axis while your starting now...

[webgeek]

very nice... might as well go ahead and add onto the X and Y axis while your starting now...

I've seen this referenced a few times - do you know of any posts with explicit details or pictures for newbies like myself? Thanks!

Mike