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VXI VT1538A user manual Directly Driving 4-Phase Stepper Motors

Models: VT1538A

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Figure 29. Directly Driving 4-Phase Stepper Motors

Figure 29. Directly Driving 4-Phase Stepper Motors

40 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP

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VXI VT1538A user manual Directly Driving 4-Phase Stepper Motors, Agilent E1538A Enhanced Frequency/Totalize/PWM SCP

Contents

82-0093-000 Release April 28 VXI Technology, Inc 2031 Main Street Irvine, CA 949ENHANCED FREQUENCY/TOTALIZE/ PWM SIGNAL CONDITIONING PLUG-ON VT1538AVXI Technology, Inc Static DAC Products INTRODUCTIONDynamic DAC Products SUPPORT RESOURCES VXI Technology World HeadquartersVXI Technology Cleveland Division VXI Technology Lake Stevens Instrument DivisionUser’s and SCPI Programming Manual Signal Conditioning Plug-onAgilent Technologies E1538A Enhanced Frequency/Totalize/PWM Agilent 75000 Series CPage About this Manual Agilent E1538A Enhanced Frequency/Totalize/PWM SCPIntroduction Identifying the Plug-on IMPORTANT Configuring Channel Pull-up Resistor Setting Configuration SwitchesConfiguring Input- Output direction Installation Connecting To The Terminal Module8 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Recommended Signal ConnectionsFigure 4. E1419A Option 11 Terminal Module Connections Input and Output Characteristics VRS Mode Input Operation SCP channels 0 & 1 only Programming With SCPI Commands Configuring the Channels Configuring I/O DirectionSetting the Input Threshold Level Checking the ID of the SCPDetermining the Input Threshold Level returns threshold valueReading Static Digital State To set channels 40 through 43 to input digital statesTotalize Positive or Negative Edge State Changes About Period and Frequency Measurements To measure frequency at channel 45 with aperture of 1 second For PERiod function, the E1538 spports two distinct measurement ranges To measure period at channel 45 as the average of 1000 signal periods Agilent E1538A Enhanced Frequency/Totalize/PWM SCPchlist specifies the channels that will read pulse widths Sense Quadrature Position The value read by the algorithm can range from Example of Rotational Velocity Sense Output Static Digital State Programming Output ChannelsControlling Output Polarity Variable Width Pulse Per Trigger 26 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Variable Width Pulse Train PWMFigure 17. Output Pulse-Width-Modulated Signal Variable Frequency Fixed Width Pulse Train FM 28 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Variable Frequency Square-Wave Pulse Train FMFigure 19. Output Square Wave Variable Frequency FM Rotationally Positioned Pulse Output Rotational Pulse Command Usage Variable Angular Position, Preset Pulse Width by angle Rotational Pulse ModeVariable Angular Position, Preset Pulse Width by time Example of variable position, preset widthFigure 21. Variable Position, Width Preset by Angle Rotational Pulse ModeVariable Pulse Width by angle, Preset Angular Position Figure 22. Variable Position, Width Preset by TimeRotational Pulse Mode Agilent E1538A Enhanced Frequency/Totalize/PWM SCPExample of variable width by angle, preset position 34 Agilent E1538A Enhanced Frequency/Totalize/PWM SCPRotational Pulse Mode Variable Pulse Width by time, Preset Angular PositionExample of variable width by time, preset position preset ch 46 pulse width to 10ms preset ch 47 pulse width to 15msFigure 24. Fixed Position, Variable Width by Time 36 Agilent E1538A Enhanced Frequency/Totalize/PWM SCPStepper Motor Control Use the command motor phase channel group can not be split across SCPs Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Figure 27. Full Step Mode, Full and Half Speed, 4-ChannelFigure 28. Half Step Mode, Full Speed, 4-Channel Figure 29. Directly Driving 4-Phase Stepper Motors 40 Agilent E1538A Enhanced Frequency/Totalize/PWM SCPRST and *TST important Agilent E1538A Enhanced Frequency/Totalize/PWM SCPSCPI Command Reference Command SyntaxFor newer PageCommand Syntax For newerPage units onlyINPutPOLarity INPutPOLarity?Parameters Commentslevel can be set to a resolution of INPutTHResholdLEVelINPutTHResholdLEVel? ParametersOUTPutPOLarity OUTPutPOLarity?Send with VXIplug&play Function hpe14XXcmdReal64Q generatedSENSeFREQuencyAPERture RST Condition .001 sec Send with VXIplug&play Function hpe14XXcmdParameters CommentsRelated Commands SENSFREQAPER SENSeFREQuencyAPERture?SENSeFREQuencyLIMitLOWer ParametersINIT Send with VXIplug&play Function hpe14XXcmdRelated Commands INPutPOLarity SENSeFREQuencyLIMitLOWer?SENSeFUNCtionCONDition Returned Value .01667 to 250, The type is float32SENSeFUNCtionFREQuency SENSeFUNCtionPERiodParameters ParametersSENSeFUNCtionPWIDth SENSeFUNCtionQUADratureParameters CommentsSENSeFUNCtionRVELocity ParametersSend with VXIplug&play Function hpe14XXcmd Usage See “Sense Quadrature Position” on pageParameters Send with VXIplug&play Function hpe14XXcmdUsage See “Sense Rotational Velocity” on page 54 Agilent E1538A Enhanced Frequency/Totalize/PWM SCPSENSeFUNCtionTOTalize ParametersSend with VXIplug&play Function hpe14XXcmd Usage See “Totalize Positive or Negative Edge State Changes” on pageRST Condition .001 sec Send with VXIplug&play Function hpe14XXcmd SENSePERiodAPERtureParameters SENSePERiodAPERture? SENSePERiodLIMitUPPerParameters ParametersSend with VXIplug&play Function hpe14XXcmd 58 Agilent E1538A Enhanced Frequency/Totalize/PWM SCPSENSePERiodLIMitUPPer? SENSePERiodMODERST Condition is “APERture” ParametersRelated Commands SENSePERiodMODE SENSePERiodMODE?SENSePERiodNPERiods interval mode currently set for period measurementSENSePERiodNPERiods? SENSePERiodRANGeUPPerSend with VXIplug&play Function hpe14XXcmdInt32Q ParametersSENSeTOTalizeRESetMODE SENSePERiodRANGeUPPer?RST Condition is Send with VXIplug&play Function hpe14XXcmd ParametersSENSeTOTalizeRESetMODE? SOURceFMSTATeParameters CommentsSOURceFMSTATe? Send with VXIplug&play Function hpe14XXcmdInt16QParameters CommentsSOURceFUNCtionRPULse ParametersSOURceFUNCtionSHAPeCONDition SOURceFUNCtionSHAPePULSeParameters ParametersSOURceFUNCtionSHAPeSQUare SOURceFUNCtionSTEPperComments Send with VXIplug&play Function hpe14XXcmd Parameters68 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Table 3. Stepping mode valuesFigure 31. Relationship of minvel, and maxvel SOURcePULMSTATe ParametersSend with VXIplug&play Function hpe14XXcmd Send with VXIplug&play Function hpe14XXcmdSOURcePULMSTATe? SOURcePULSePERiodParameters ParametersSOURcePULSePERiod? SOURcePULSeWIDThParameters ParametersSOURcePULSeWIDTh? SOURceRPULsePOSitionANGLe33,554,430 to 33,554,430 ParametersSOURceRPULsePOSitionANGLe? SOURRPULseVARTypeUsage ParametersSOURRPULseVARType? SOURceRPULseWIDThANGLeParameters ParametersSOURceRPULseWIDThANGLe? SOURceRPULseWIDThTIME00000787 to ParametersSOURceRPULseWIDThTIME? ParametersUsage SOURRPULSEWIDTTIME? @147 76 Agilent E1538A Enhanced Frequency/Totalize/PWM SCPSpecifications General SpecificationsOutput Characteristics Input Characteristics1 mSec to 1 Second, resolution Resolution HzTotalizer Frequency MeasurementRotational Velocity Measure Pulse Width MeasureFrequency Source Pulse SourceCharacteristics Rotational Pulse Source80 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Extra Tooth Wheel