C11G (Rev.8.2) User Manual
Revision: 01/27/2010 http://cnc4pc.com/TechDocs/C11GR8_2_User_Manual.pdf 7/21
Selecting the SCHP operation mode.
The Safety Charge Pump can be
activated
or
deactivated
depending on the jumper position
1-2: SCHP OFF
2-3: SCHP ON
Note:
When the Safety Charge Pump is activated, the EN terminal is active and a
valid SCHP signal is present, pin 17 will go high. This high signal can be used to
enable other external devices, such as enabling other Breakout Boards, or relays
that would enable servos, VFDs, contactors, etc….
6.2 Variable Speed Control. (pin 14)
This function lets you control your spindle with step and direction signals, as if it was
an axis motor. It converts the step signal into an analog (0-10VDC).
A Variable Frequency Drive or Inverter works by modifying the frequency for AC
motors. Most of these devices with an external analog signal (0-10VDC). That is, if
there is 5VDC coming into through the control signal, the motor will run at 50% of full
speed, if there was 10VDC, the motor will run at 100% of full speed. If there is no
signal coming out, then the motor will stop.
This function can also be used on many DC motor controllers by replacing the
potentiometer that controls the speed.
Requirements:
It requires a +12VDC@ 20mA power supply to operate.
WARNING:
To keep the output signals optoisolated, these must not
have common ground or connections to current with other circuits you
are using.
