View Full Version : Conect 121 Retrofit

06-02-2015, 10:21 AM
Hi Folks,

After getting side tracked for about 2 years doing other projects I am finally getting back to converting my machines. I still havenít fitted my CNC Fusion kit to my mill and my Orac is sitting on a corner neglectedÖ. I will get round to these!
For now I have a nice little Conect 121 to convert for my dad. I am still learning as I go with the electronics involved in these conversions but there is a wealth of knowege on the forum for me to learn from.
My first task after taking delivery on Saturday will be to inspect the stepper motors on the machine and try to determine what they are. There is no information on the X axis stepper what so ever but I think the Y may have something on it. I want to make use of these motors if possible and I am sticking with the DC spindle motor. I still need to see how the KB dc controller boards can be hooked up to the BOB but I know itís been done before.
If anyone knows what the steppers are on a 1985 Conect 121 please let me know.
I have yet to choose the drivers etc but as soon as I know what motors im dealing with I can get on that.

Pictures to come after I take delivery!

09-02-2015, 08:15 PM
It has arrived and it multiplied in transit!

http://i295.photobucket.com/albums/mm154/minimad30/Mobile%20Uploads/DSC_0080_zpsnjl3isee.jpg (http://s295.photobucket.com/user/minimad30/media/Mobile%20Uploads/DSC_0080_zpsnjl3isee.jpg.html)

the guy had two of them and he wanted them both gone. Looks like there will be one for me ��

i have aver since stripped off the motors from one to try and bench test a the motors with whatever drivers etc I end up with. i don't have much info on the motors yet but they look to be 8 wire unipolar by default. Going to try running them bipolar.

For a small lathe like this I'm thinking running it in series rather than parallel as these may only be 1a motors?.. Recommendations?

also anyone used bob from cnc4you?

more photos to come!

16-02-2015, 10:56 PM
All electronics ordered from cnc4you. Went the digital.driver route With a 36v supply.

Everything is now wired up and housed witwithin an old xbox enclosure. Perfect size!

http://i295.photobucket.com/albums/mm154/minimad30/Mobile%20Uploads/EDAAC163-3D2D-49DF-9509-08F4C6354EDE_zpsrkcnxzsd.jpg (http://s295.photobucket.com/user/minimad30/media/Mobile%20Uploads/EDAAC163-3D2D-49DF-9509-08F4C6354EDE_zpsrkcnxzsd.jpg.html)

http://i295.photobucket.com/albums/mm154/minimad30/Mobile%20Uploads/A7130E86-BC5E-47C1-9336-0B4851971BBD_zpsgsozn9v3.jpg (http://s295.photobucket.com/user/minimad30/media/Mobile%20Uploads/A7130E86-BC5E-47C1-9336-0B4851971BBD_zpsgsozn9v3.jpg.html)

The min is there temporarily until I can get some nylon standoffs.

The motors were tested tonight and they live!! The little one is getting a bit warm which I'm concerned about. They are wired in series.as they are only 1 amp per phase motors.

This correct?

17-02-2015, 11:45 PM
How warm? They can happily run almost too hot to touch.