Configuration of the TwinCAT NC

The TwinCAT NC can be configured by parameters. A complete description of the parameters of the TwinCAT NC can be found in the Documentation of the TwinCAT functions TF50x0 or on our website: https://www.beckhoff.de/tf5000.

Set the following parameters carefully:

Basic unit

This setting defines the units of the parameters of the axis.

You can find this setting at:
NC axis > tab "Settings" > drop-down menu "Unit".

• For rotatory movements select ° or "Degree".
• For linear movements, select mm or m.

Reference velocity and maximum velocity

You can find these parameters at:
NC Axis > "Parameters" tab > "Reference Velocity" and "Maximum Velocity"

Recommendation: enter the rated speed or rated velocity for the "Reference Velocity".

Dynamics

You can find the dynamics parameters at:
NC Axis > "Dynamics" tab

Set the acceleration time and deceleration time: "Acceleration Time" and "Deceleration Time".

Select the ramp curve using the sliders.

Encoder scaling factor for rotary axes

You can find these parameters at:
NC Axis > "Enc" > "Parameters" tab

The encoder scale factor is specified as a fraction. There is a parameter for the numerator and a parameter for the denominator.

• Numerator: "Scaling Factor Numerator"
• Denominator: "Scaling Factor Denominator"

The value for the encoder scaling factor depends on whether you are using an incremental encoder:

• For operation with an incremental encoder:
• "Scaling Factor Numerator": 360°
• "Scaling Factor Denominator": The resolution of the incremental encoder multiplied by a factor of four.
  Unit: Increments per revolution.
  Example with 1024 increments: 1024 x 4 = 4096
• For operation without incremental encoder:
• "Scaling Factor Numerator": 360°
• "Scaling Factor Denominator": 65536

Encoder scaling factor for linear axes

• "Scaling Factor Numerator": 1 mm
• "Scaling Factor Denominator":
• Convert the resolution of the incremental encoder to Inc/mm.
• Multiply the resolution by a factor of four.
• Enter the result in the parameter "Scaling Factor Denominator".

Example:

The resolution of the incremental encoder is specified as 512 Inc / (2 mm). This corresponds to 256 Inc / mm.
For the "Scaling Factor Denominator", enter: 256 x 4 = 1024.

Output scaling for velocity

You can find this parameter at:
NC Axis > "Drive" > "Parameters" tab

The output scaling of the velocity is only relevant for the CSV operation mode.

The calculation depends on whether you are using an incremental encoder:

• For operation with an incremental encoder:
  
  Example: for an encoder with 1024 increments per revolution, the output scaling is 10.98632813.
• For operation without incremental encoder: