The relationship between target and angle of rotation

[malkoba]

Hi

What is the relationship between the target position in load target position.flx vi and the actual angle of rotation of the stepper motor. I am using a 1.8 degree stepper motor using MID 7604 stepper motor driver set at 10 micro steps/step and 7334 controller. What wil be the angle of rotation if I put -say-  10 as the target position?

Thanks

Mal

[Jochen]

If a full step is 1.8° and microstepping is 10 then a move of 10 steps results in a move of 1.8°.

Best regards,

Jochen Klier
National Instruments Germany

[malkoba]

Hi

Thanks. But do you know the mathematical relationship between the target position (in the vi) and the actual angle of rotation?

Thanks

Mal

[Jochen]

I'm sorry but I don't understand exactly what you mean. After starting your PC the internal position counter of the board is set to zero. You will need a reference position (e. g. home switch) that indicates the zero position of your mechanical axis. You need to use "find reference" to find this reference position. After that you will be able to rotate the axis to a defined position (2000 steps = 360°).

Jochen

[malkoba]

Hi

Thanks for the reply. What is the relation ship between the value I enter for 'target position 'in load target position.flx vi and the angle of rotation of a 1.8deg stepper motor driven at 10 micro steps/step?

If the value I enter for 'target position' in load target position.flx vi is 'X'

and the motor is set to rotate at 'y' micro steps/step

Then what is the relationship between the motor shaft angle of rotation 'alpha' and x and y.

I would appreciate if you clarify this.

Thanks

Mal

[Jochen]

alpha = (1.8/y) * X

[malkoba]

Hi

Thanks for your help.

Thanks

mal