Brushless motor for X3-sized mill


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Thread: Brushless motor for X3-sized mill

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    Moderator Novec's Avatar
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    Default Brushless motor for X3-sized mill

    I'm sure this has been answered before, so I'm happy with a link to another thread. Searching returned too much information to find a good answer.

    So, to the case: I'm building a beefed up X3-sized mill and need a 1-2 kW brushless motor in the 5000 RPM range with a driver that works with Mach3. Budget is definitely an issue, and as I live in Norway heavy motors will cost quite a bit to ship.

    One option is to get the motor from an SX3 and get a better controller, if that's available.

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    Although the question has indeed been asked before, there has yet to be a satisfactory answer to this. I have an SX3, and here is what I have done.

    I am just finishing up a conversion of my stock SX3 motor with an AMC servo driver I got from Ebay. I am using an AMC B30A40AC drive, running on 220VAC, and have the drive interfaced to a Gecko G540 for on/off/speed control from Mach3; as well as a new front panel with a pot instead of the up/down switches on the SX3. As the motor is only 3600 RPM, this is not quite what you have in mind; but it is a known working solution. Options are to find a similar BLDC motor with a higher speed rating. One possibility is the Keling motor (Page Title - motor only - the listed controller has been deemed unsuitable) which is good to 6000 RPM. I may try one of these someday with my AMC drive if I ever find myself speed limited.



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    If your not stuck on using a brushless motor the treadmill PMDC motors with controller works very good for smaller mills. You can shop around on Ebay and find one that is 2 1/2 or 3 hp and they run upto around 7500rpm.


    I am using one on a smaller mill and by using the controler that came on the treadmill I was able to get Mach3 to run & control it. Just be sure you get one that will turn CC/CW and yuo can even add a encoder and drive them with something like a Dugone or Granite Devices drive which will give you ridgid tapping and indexing if you wish.


    Probably not as good as what your looking for, but I got mine free and I can control it with Mach3. By just adding a encoder I should be able to get ridgid tapping working, but probably not indexing without using something like a servo drive ( my BOB will except a encoder signal for the spindle to sync it which shhould work for tapping).


    DMM Technology has some nice A/C setups but getting the RPM your after will be hard. I also wanted higher RPM and for the small mill I have the treadmill PMDC motor is great. I think Hoss has one on his G704 also.


    Even if you did want a brushless motor the treadmill setup will work & can be had cheap which would get you by until you score something else. I believe its the Norditrac treadmills that have the best motors, but motor & controlller can be bought on Ebay for less than a houndred dollars most of the time.


    The AMC and other such industrial drives/motors are a good setup if you can score one on Ebay. Out side of these two routes there is not much options other than going with a 3 phase A/C motor & VFD. IDK if the Keling setup has been performing good enough for the price. They may have fixed though , I am not sure.


    Jess

    GOD Bless, and prayers for all.


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    Kelling has this ,

    Page Title



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    As I understand it that motor controller has major issues that are unresolved. I don't think John (Keling) even recommends getting it at this point.

    CNC: Making incorrect parts and breaking stuff, faster and with greater precision.


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    Quote Originally Posted by Novec View Post
    I'm sure this has been answered before, so I'm happy with a link to another thread. Searching returned too much information to find a good answer.

    So, to the case: I'm building a beefed up X3-sized mill and need a 1-2 kW brushless motor in the 5000 RPM range with a driver that works with Mach3. Budget is definitely an issue, and as I live in Norway heavy motors will cost quite a bit to ship.

    One option is to get the motor from an SX3 and get a better controller, if that's available.
    You can also use a standard 3 phase AC motor with vector drive inverter. Maybe a little more heavy/bulky and limited to 3kprm@50hz. I have a 3kprm which is running at 5k without any trouble.

    80 frame are up to 1.1kW (10kg), 90 frame up to 2.2kW (15kg). All with S1 service (ie continuous operation).



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Brushless motor for X3-sized mill

Brushless motor for X3-sized mill