Steps to initialize the Single_w program for a new number of motors
to use the program to drive a translation device.
· The Motorport (Hex) list box should read ‘3F8’.
· There are 4 Motor Connected check boxes. You can select 1 to 4 motors from left to right. In the illustration, 2 motors have been selected. The headers 2-Theta, Omega, Chi and Phi are meaningful for a four-circle diffractometer, but for arbitrary purposes can be considered as motors 1-4. All data in the Chi and Phi columns are meaningless when only 2 motors have been selected.
· When using these motors to drive a translation device Steps/Degree should be interpreted as steps per unit length. You must calibrate this parameter.
· You may find that a motor moves in the negative direction when you give it positive movement. The positive direction is arbitrary and is influenced by simple things like how the stepper motors were connected. Thus, if you want to change the direction of positive motion of a stepper motor, then change the state of the check box labeled “Change Motor Direction”.
· Slew Velocity determines the speed at which the motor turns. You must decide for yourself what is a good speed. It is a function of all sorts of things, but you should choose a speed that produces low motor noise and is acceptable to the experiment.
· Ramp Steps determine acceleration. A value of 15 means the motor will accelerate from 0 velocity to the assigned value of the Slew Velocity in 15 motor steps.
· Jog Speeds refer to a manual controller and is not applicable right now, unless you attach a manual controller. Talk to me if you want to do this.
· After setting the parameters, click on the Initialize button.
If problems will occur, it is likely that they will happen at this stage because the DAX units have to be properly initialized with the manufacture’s software. The motors drives should be labeled “A”, “B”, “C”, “D”,…. If you switched your units from two DAX to one, then a error may occur if you hooked up the unit that was initialized for “C” and “D” instead of “A” and “B”.