iCNC Perfromance
Manual 0-5401 MOTION 4-1
SECTION 4: MOTION
4.1 Motion in General
iCNC Performance provides motion output for Step/Dir for position loop and +/- 10VDC analog signal for speed loop. iCNC
Performance also has an encoder connector for position feedback from a servo drive or encoders.
4.1.1 Motion Signal Characteristics
Signal Type Description
Step
Differential Differential step signal for position loop. Max frequency 200kHz. For single ended
operation, use only Step + signals.
Dir
Differential Differential direction signal for position loop. Sets motor driving direction. For single
ended use either + or - signal only. To change CCW and CW, swap the + and - signals.
Speed Analog voltage +/- 10VDC, 15-bit speed signal for speed loop.
Encoder Differential 5-12VDC Encoder input, differential (4 wires per drive!). GND needs to be connected
between CNC and servo drive. Maximum input frequency 1MHz.
Enable Output Grounding output active LOW
5VDC Output 5VDC output max current 1A
24VDC Output 24VDC output max current 0.5A
WARNING
The system uses either step/direction or the analog speed outputs for ALL axis, they cannot be mixed. In 3-axis analog
speed mode the Y2 will be synchronized to Y1 using the encoder feedback, while in step/direction mode the Y1 & Y2 signals
are paralleled making it impossible to command them independently from each other.
WARNING
Step/direction mode can be used without encoder feedback to the CNC. In such case the CNC needs to have a “servo system
OK” signal as an input to indicate the status of the drive system.
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