Bosch 6000 User's Guide download pdf (Page 153)

138

6000 Series Programmer's Guide

Joystick and Analog Inputs

☞

Refer to your

Installation Guide

for connection

procedures.

The 6000 controller has up to four 8-bit analog input channels (CH1 - CH4). The analog inputs

are configured as discrete single-ended inputs, with an input range of 0.0V to 2.5V. These inputs

can be used to control an axis with a joystick (see Joystick Control). If you have a stepper

product, you can use these inputs to scale velocity during feedrate override (see Feedrate Override).

The voltage value on the analog inputs can be read using the ANV or TANV commands.

NOTE

The joystick and analog inputs feature is not available for the OEM-AT6400.

2-axis products have 3 analog input channels, 4-axis products have 4 channels.

Joystick Control

Joystick control can be achieved by simply connecting a joystick potentiometer to one of the

analog inputs. Joystick operation is enabled with the JOY1 command.

NOTE: The Daedal JS6000 joystick is plug-compatible with the 6000 Series controllers. To

order the JS6000, contact Daedal at (800) 245-6903 or contact your local distributor.

Travel limitations in potentiometers and voltage drops along the cables may make it

impossible to achieve the full 0.0V to 2.5V range at the joystick input. Therefore, you must

configure the controller to optimize the joystick's usable voltage range. This configuration

will affect the velocity resolution. The velocity resolution is determined by the following

equation:

maximum velocity set with the JOYVH or the JOYVL command

voltage range between the joystick's no-velocity region (

center deadband

) and its maximum-velocity region (

end deadband

)

To establish the velocity resolution, you must define the full-scale velocity and the usable voltage.

Define Full-

Scale

Velocity

You must define the full-scale velocity for your application with the JOYVH and JOYVL

commands. Both commands establish the maximum velocity that can be obtained per axis by

deflecting the potentiometer fully clockwise or fully counter-clockwise. The JOYVH

command establishes the high velocity range (selected if the joystick select input is high –

sinking current). The JOYVL command establishes the low velocity range (selected if the

joystick select input is low – not sinking current).

The JOYAXL and JOYAXH commands define which analog channels are to be used with which

joystick axes when the joystick select input is low or high, respectively.

Define

Usable

Voltage

Use the commands described in the table below to establish the joystick's usable velocity range.

The analog-to-digital converter is an 8-bit converter with a voltage range of 0.0V to 2.5V. With

8 bits to represent this range, there are 256 distinct voltage levels from 0.0V to 2.5V. 1 bit

represents 2.5/256 or 0.00976 volts/bit.

Command Name Purpose

JOYEDB

End Deadband This command defines voltage levels (shy of the 0.0V and 2.5V endpoints)

at which maximum velocity occurs. Specifying an end deadband effectively

decreases the voltage range of the analog input to compensate for joysticks

that cannot reach the 0.0V and 2.5V endpoints.

JOYCTR

(or JOYZ)

Center

Voltage*

This command defines the voltage level for the center of the analog input

range (the point at which zero velocity will result). As an alternative, you

can use the JOYZ command, which reads the current voltage on the

joystick input and considers it the center voltage. You can check the center

voltage by typing in JOYCTR[cr].**

JOYCDB

Center

Deadband

This command defines the voltage range on each side of the center voltage

in which no motion will occur (allows for minor drift or variation in the

joystick center position without causing motion).

* Because the center voltage can be set to a value other than the exact center of the potentiometer's voltage

range, and because there could be two different velocity resolutions, the positive direction velocity

resolution may be different than negative direction velocity resolution.

** Because of finite voltage increments, the controller may not report back exactly what you specified with the

JOYCTR command.

1 2 ... 148 149 150 151 152 153 154 155 156 157 158 ... 267 268

Bosch 6000 User's Guide Page 153

Comments to this Manuals

Bosch 6000 User's Guide Page 153

Comments to this Manuals

Related products and manuals for Coffee grinders Bosch 6000