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DigiSpeed-GX™
7 Operation
7.1
Operation Modes
The DigiSpeed-GX™ has four operational modes, selected by jumpers MS1, MS2 in
jumper block JP2. The selection of the modes is described below.
The selection of the mode is done at power up initialization.
Note: If the mode selection jumpers are modified after the unit is powered up, the new mode will
not take effect until the power is cycled.
Each of the modes is discussed in detail below.
7.1.1 Analog Input Mode
In this mode the DigiSpeed-GX™ controller accepts an analog 0-5Vdc signal. 0Vdc
represents 0%, varying to 5Vdc which represents 100% of maximum spindle speed.
This will provide 1023 speed increments from 0 to 100% of maximum spindle speed.
With the DigiSpeed-GX™ module supplied with power, and no analog signal is present,
the LED will be a Red slow double flash. This indicates that the spindle is active but the
speed is set to 0 %. Then, when an analog voltage signal is present, the LED will be a fast
continuous flash, indicating that the spindle is active and the speed is set to a value greater
than 0 %.
7.1.2 PWM Input Mode
In this mode the DigiSpeed-GX™ controller accepts an "Active Low" Pulse Width
Modulation signal. The duty cycle of this signal represents 0 to 100% of maximum spindle
speed.
The PWM signal period can be in the range of 2Hz to 50Hz. The optimum period is 50Hz.
Copyright 2006 ©
- Users Guide
Mode
ANALOG
PWM
Attenuation Trimpot
Table 3: Mode Selection Jumpers
Homann Designs
MS1
Removed
Don't Care
Installed
Removed
Installed
Installed
Page 19
MS2
Revision 0.1
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