Bosch 6000 User's Guide download pdf (Page 96)

Chapter 3. Basic Operation Setup

Drive Resolution

(steppers only)

This setup parameter is

not required for packaged

drive/controller products

(e.g., 610n, 615n, 6201).

The drive resolution controls the number of steps the stepper controller considers as a full

revolution for the motor drive. The controller's resolution is set with the DRES command

(default is 25,000 steps/rev). Refer to the user documentation that accompanied your drive if

you need to change its resolution.

IMPORTANT NOTES

• If the controller's resolution (set with the DRES command) does not match the drive's

resolution, the motor will not move according to the programmed distance and velocity.

• Contouring: All axes involved in contouring (identified with PAXES command) must have

the same DRES setting.

Step Pulse

(steppers only)

The step output pulse width can be varied using the PULSE command. The pulse width can be

0.3 µs to 20 µs (default is 0.3 µs). The pulse width is the amount of time the step output

signal is active (see illustration below). The step output pulse width should be configured to

meet the minimum step input pulse width requirement of the motor drive you are using.

Step +

4 Volts

0.4 Volts

Pulse Width

Step -

4 Volts

0.4 Volts

The pulse width does not vary as the motion profile is executed. The same pulse width is used

during acceleration, constant velocity, and deceleration.

When the pulse width is changed from the default value of 0.3 µs, the maximum velocity and

distance ranges are reduced. The amount of reduction is directly proportional to the change in

pulse width (see table below). The “maximum distance” is per move; the total absolute range

for each axis remains at ±2,147,483,647.

Pulse Width (PULSE) Setting Maximum Distance Per Move Maximum Velocity

DEFAULT -- 0.3 µs 419,430,000 1.6 MHz

0.5 µs 262,140,000 1.0 MHz

1.0 µs 131,070,000 500 KHz

2.0 µs 65,535,000 250 KHz

5.0 µs 26,214,000 100 KHz

10.0 µs 13,107,000 50 KHz

16.0 µs 8,191,000 35 KHz

20.0 µs 6,553,000 25 KHz

NOTE

Contouring

: All axes involved in contouring (identified with PAXES command) must have the

same PULSE setting. If you change the PULSE setting, you will need to

recompile (PCOMP) any previously compiled paths.

Streaming

: All axes involved in the streaming mode (STREAM) must have the same PULSE

setting. (This pertains only to bus-based stepper controllers.)

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Bosch 6000 User's Guide Page 96

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