Axis 670 Manuel d'instructions télécharger pdf (Page 17)

3.8.2. Output Stage Disable

The output amplifier is disabled during the power up sequence and recovery from a fault

condition. See sections 3.11 and 3.13 for details. The output amp can also be manually disabled

by grounding

the

TP4 "MUTE" test-point, or the Remote Shutdown input on

J4.6.

Grounding the

Remote Shutdown input will disable the output amp by initiating a continuous fault recovery

sequence, but grounding TP4 will not. Therefore, TP4 is useful for performing Notch Filter

Module tuning (see section 6.2).

For added motor protection a fuse Fl has been placed in-line with the output op-amp

U5.

See

the motor specifications for the proper fuse rating to be used with each servo configuration. To

momtor the voltage signal being sent to the scanner, clip a scope probe to one side ofthe fiise.

Use

TP2

W7.2

for

the

ground reference.

3.9. Reference Voltages

A voltage reference, U17 (LT1021-5), provides +5 volts for the overposition monitor. Command

Offset contiol, coil temperature calculator, and the DAC references. It is also converted to -5

volts through an inverting amplifier,

U16B.

The -5 volts is used in the ACJC circuit, overposition

monitor, and the DAC references. The +/-5 volts used for these various functions are labeled +/-

VREF,

so that they are not confused with the +5 volts used to power the digital circuitry. The

two reference voltages are available on W7.1 (+VREF) and W7.3 (-VREF) for extemal use

provided that no more than 2ma current is drawn from either of them. W7.2 is the ground

reference for these voltages.

3.10. Notch Filter Socket

The 670 Board is ready to accept a 6740-XX series Notch Filter Module (NFM). This module is

inserted into the J5 socket. If the NFM is not used, then pins

& 2 ofthe socket must be shorted

together. See appendix 6.2 for infoimation regarding the use ofthe 6740-XX NFM.

3.11.

Observation/Control Header

3.11.1

User Outputs

Various observation and contiol signals exist on

J4.

They are listed below:

J4.1 - Velocity out

Time derivative of position out signal (IK ohm output impedance).

Velocity Out = (5Vpos(t)/8t)^R100^C33

J4.2 - Position out

Position out signal (IK ohm output impedance). Position Out = Vpos(t)

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 67 68

Commentaires sur ces manuels

Pas de commentaire

Axis 670 Manuel d'instructions Page 17

Commentaires sur ces manuels

Produits connexes et manuels pour Imprimer et scanner Axis 670