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148 • Appendices DMC-2X00
Velocity Accuracy:
Long Term Phase-locked, better than .005%
Short Term System dependent
Position Range: +/-2147483647 counts per move
Velocity Range: Up to 12,000,000 counts/sec
servo;
3,000,000 pulses/sec-stepper
Velocity Resolution: 2 counts/sec
Motor Command Resolution: 16 bit or 0.0003 V
Variable Range: +/-2 billion
Variable Resolution:
1 ⋅ 10
-4
Array Size: 8000 elements, 30 arrays
Program Size: 1000 lines x 80 characters
Fast Update Rate Mode
The DMC-2x00 can operate with much faster servo update rates. This mode is known as 'fast mode'
and allows the controller to operate with the following update rates:
DMC-2x10, DMC-2x20 125 usec
DMC-2x30, DMC-2x40 250 usec
DMC-2x50, DMC-2x60 375 usec
DMC-2x70, DMC-2x80 500 usec
In order to run the DMC-2x00 motion controller in fast mode, the fast firmware must be uploaded.
This can be done through the Galil terminal software such as DMCTERM and WSDK. The fast
firmware is included with the original DMC-2x00 utilities. To set the update rate use command TM.
When the controller is operating with the fast firmware, the following functions are disabled:
Gearing mode
Ecam mode
Pole (PL)
Analog Feedback (AF)
Stepper Motor Operation (MT 2,-2,2.5,-2.5)
Trippoints in thread 2-8
DMA channel
Tell Velocity Interrogation Command (TV)