K8097 questions about torque, demo and dll

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Hello,

I’m using the stepper motor card K8097 with a SP3575M0906-A motor. I’m just letting one motor run without any load.

  1. I experienced some irregularities in the motion, such as losing steps and not being able to move only few steps a time (like 1 or 4 steps).
    In this forum I found the suggestion to try the moving with torque switched on and it seems to work for me. But I failed to find an explanation for that. What is happening when torque is switched off? Why are the steps getting lost?

  2. In the MotorDemo.exe there is a button “Demo” which can be switched on and off. What does change if I switch this on or off? I did not find a description anywhere.

  3. In the manual and the forum I read, that there is a dll to use it for my own application. I found this dll in the folder Velleman->StepperMotorCards->NativeDLL. But I could not find a documentation anywhere. But for writing my own application I have to know, what functions are covered in the dll. So where can I find a documentation?

Thanks for your help and replies in advance. If you need further information, let me know.

Regards, lh

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[quote]3. In the manual and the forum I read, that there is a dll to use it for my own application. I found this dll in the folder Velleman->StepperMotorCards->NativeDLL. But I could not find a documentation anywhere. But for writing my own application I have to know, what functions are covered in the dll. So where can I find a documentation?[/quote]The installer for the K8097 contains a .NET application with source code that uses every function inside the DLL. This is the perfect place to start to write your own application.