Fast update rate mode – Galil DMC-2X00 User Manual

Page 203

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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)

DMC-2X00

Appendices

y 193

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