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Author Topic: My 1st cnc lathe conversion, spindle suggestion.  (Read 11430 times)

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Re: My 1st cnc lathe conversion, spindle suggestion.
« Reply #10 on: March 31, 2013, 06:52:53 AM »
There are 2 MRJ2S-350A drivers both purchased as used, 1 HC-SFS352 AC servo Motor, and 1 HC-SFS352 with S logo at the encoder cap (this one purchased 2 days ago). From the picture posted at the beginning, the Motor is a HC-SFS352 (no S) connected to 1 of the MRJ2S-350A, when switched on the motor speed up fast + acceleration then stop as AL on the LED screen appeared AL 51, since it was purchased as used I have no idea what had been set previously so I restored back to factory setting by going to Parameter 182 ---> use up & down keys tilll it display 0012 then press "set"--> power off drive then power on drive. Now I know this drive is at deffault settings, usually from here onwards with all the cable connected correctly, CN1B (VR knob for speed control), CN2(Encoder), 3ph power from the main to Driver's L1 L2 L3, and U,V,W to AC Servo Motor's Power, I should be able to control the speed of the Motor via the VR having the Pr 0 (0002) and 1(0001) set correctly, but the Motor still doing what it used to, another strange behaviour was when CN1B is not connected tot he Drive, the motor still be able to spin which shouldn't be. The same thing happens to the other MRJ2S-350A Drive, so I think I have purchased 2 faulty drives, to proof this is faulty I unplugged CN1B (VR speed control knob) and plug it to another Mitsu drive MRJ2S-100A (This is a working Drive) to test it, as I turn the VR knob the motor increase or decrease speed, this is what a genuine Drive should do.

I used the same cable for all drives.


Offline Hood

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Re: My 1st cnc lathe conversion, spindle suggestion.
« Reply #11 on: April 01, 2013, 03:16:21 AM »
Ok think what you are saying is you have only tested the CN1B connector on another drive?
Have you tried changing round the R S T wires?
Do you have to set up the motor parameters in the servo drive? It is normal for AC servos that you have to load a motor profile unless the encoders are smart encoders and  contain motor information.
Hood
Re: My 1st cnc lathe conversion, spindle suggestion.
« Reply #12 on: April 01, 2013, 04:42:18 AM »
Changing R S T wires, would it make difference if I change U V W wires?

Have a look at this drive:
http://s1204.photobucket.com/user/cncfreakcncfreak/media/BVB25L%20cnc%20conversion/M4V05805_zpsbc953515.mp4.html

This is a MRJ2S-40A, on the right hand side is a speed control VR connected to CN1B.
I will do a final test for the MRJ2S-350A drive tomorrow.

Offline Hood

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Re: My 1st cnc lathe conversion, spindle suggestion.
« Reply #13 on: April 01, 2013, 05:45:58 AM »
Yes RST/UVW shame thing, just some drives call them one and some the other.
Hood
Re: My 1st cnc lathe conversion, spindle suggestion.
« Reply #14 on: May 24, 2013, 02:23:16 AM »
Hello Hood,
                I had the AC servo drives fixed, It is running fine now.
I was told that the RST does not matter but the UVW have to be connected correctly:


Video clip:

http://s1204.photobucket.com/user/cncfreakcncfreak/media/BVB25L%20cnc%20conversion/M4V05905_zps3d87a359.mp4.html

Offline Hood

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Re: My 1st cnc lathe conversion, spindle suggestion.
« Reply #16 on: May 25, 2013, 08:15:08 PM »
Looks to be working well :)
Nice finish as well, what is the material?
Hood
Re: My 1st cnc lathe conversion, spindle suggestion.
« Reply #17 on: May 25, 2013, 08:41:04 PM »
The material is a piece of Brass rod.
Will show a video clip of Visual Turn simulation sometime later.

Offline Chaoticone

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Re: My 1st cnc lathe conversion, spindle suggestion.
« Reply #18 on: May 25, 2013, 09:24:02 PM »
Yup, looks good.  :)

Brett
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Re: My 1st cnc lathe conversion, spindle suggestion.
« Reply #19 on: May 27, 2013, 08:16:03 PM »
Here is a video of Visual Turn to Mach3 Turn:

http://www.youtube.com/watch?v=pVPIHbZNI3k&feature=share&list=UUpqKQljKkdBanamxgJSCuog

I'm not getting much support from Mecsoft forum, so I will ask my questions here:
I'm looking for  someone who has used Visual turn for help, please drop a note here if you use Visual Turn.
From the video link above, can someone point out if I have Mach3 setup correctly?, I'm a bit confused on cnc lathe's X axis and Z axis Positive and negative direction, for X axis, is it correct that when the cutter moves away from the stock is Negative? and For Z axis, when moving away form the stock is Positive?
Need some basic intro. on cnc lathe.

thanks,