Got steppers mounted on CNC Mill

David G

Well-known Member
I got the steppers mounted on mill.

I have to make and mount cabinet to house electronics, then can test.
a150744.jpg
 
Now to see if they have enough torque, if not, I will mount stepper on sliding plate and use timing belt with reduction.
 
Keep the pictures coming, David--always like to see projects like this! Should be a very useful piece of equipment when you're done.
 
Refresh my memory here. So you are using a digital linier scale that the program translates into steps, I presume. I'm wondering how the program deals with play in the screws. Meaning, for instance, when it changes direction and goes through several steps without seeing movement on the scale.
 
I'm thinking that they have enough torque but as I recall the issue can be starting and stopping load which usually depends on the capacitor capability in the motor driver.
 
Right now I have lead screw, so I have to "predict" the slop and enter that in the settings. I could install ball screw would eliminate almost all the slop, or/and could install encoder on bed for precision feedback.
 
That's the issue I'm talking about. I'm wondering how an encoder on the bed would be received by the computer when it "orders" a step and doesn't see enough movement. I have a friend who built his own CNC 6' long router table. I asked him and he says he uses no encoders at all. It just works off a single starting point. His is tooth belt driven so he can tighten out play but says he has to be very careful about feed rates because if it misses a step it continues like nothing happened and ruins the piece.
 

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