Summary of Contents for PMC LN3X Series
- Page 1 LN3X Series Motor and Drives Operator's Manual PN 04-01920 C PRECISION MOTION CONTROLS 2175 De La Cruz Blvd., #1 Santa Clara, CA 95050...
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Page 2: Table Of Contents
Contents INTRODUCTION ..............................3 Description ................................3 Features ................................. 3 Warranty ................................3 INSTALLATION ................................ 5 Unpacking ................................5 Cooling ................................... 5 Wiring ..................................5 Commands ................................10 Electrical ................................15 Motor Compatibility ............................. 15 Indexer Inputs ..............................15 Resonances ................................15 Appendix LN3X Specification... -
Page 3: Introduction
INTRODUCTION Description The LN3X Drive is a microstepping drive with a linear amplifier output stage. It is intended for stepping motor applications where motor vibration must be minimized and EMI noise can't be tolerated. The LN3X drive eliminates EMI noise in the steady state condition and minimizes EMI noise while running. The drive’s dual voltage supply design allows this unit to have speed vs torque curves superior to most pulsewidth modulated drives while minimizing the stress on the power amplifier. - Page 4 PMC's linear drives have a one year warranty against manufacturing defects from the date of purchase. If your unit should ever fail, and you wish to send it back for repairs; you should do the following: 1. Get the serial number from the defective unit.
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Page 5: Installation
The center pin of the connector is for the shield connection of the motor cable. The center pin (shield) is connected to the motor case on PMC supplied motors. The motor connections are listed below. - Page 6 (Green) You can change motor rotation direction by swapping A+ with A- or B+ with B-. Line Power The drive has an AC line voltage (115 or 220 VAC) selection switch on the side of the unit. All units are shipped with the selection switch in the 115 VAC line voltage position.
- Page 7 Typical inputs, output connections The limits and home typically are connected to 5V TTL signal, they are active when there is a 5V drop across + and – pins. A current limit resistor is required between the Fault+ and external 5V supply. Typically a 10K resistor is used for 5V supply.
- Page 8 56ma per bits for a 3.5amp driver. The off position of the switch selects the current; switch 6 is the most significant bit. The PMC supplied motors run at approximately 2.5 amp/phase peak current. The motor current table above is for 2.5 amp version. In the 2.5amp version the user can activate the standby mode by selecting switch 2-8 to off position.
- Page 9 enable echo enable CR The user has the ability to select the motor current wave shape. This will help provide even steps and minimize motor vibrations for various motors. If you use motors that have a large detent torque compared to the motor torque you may need to select a wave form other than 0% wave shape. The wave shape corrections are based on a percentage of third harmonic distortion.
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Page 10: Commands
Commands Set RS232 communication protocol correctly and de-select the test mode in the dip switch to enter command mode. The following are a list of commands that are accepted over the RS232 input. The small x's after a command stand for numbers that can be entered. The alpha characters must be capital. The command is entered by following a Space key. - Page 11 D256000 will set the move to 10 revolution acceleration at 10rev/sec², incremental move; a D- 256000 is 10 rev CCW. The distance must be entered before each move. There is not a default distance and it is reset after each move. Do not enter a distance while the motor is moving. This tells the unit to start the move.
- Page 12 This puts the unit in velocity mode. The unit will accelerate to the velocity entered. New velocity values may be entered while the motor is running. As soon as the new velocity is entered it becomes the target velocity whether the previous velocity had been reached. The acceleration may also be changed while the motor is running.
- Page 13 Report Motor status Sends out the motor status in hex. It tells whether the last movement was acceleration or deceleration, whether the motor is running and the mode (velocity or incremental). motor direction 1 = positive continuous mode = 1 incremental mode = 1 absolute mode = 1 accelerate = 1...
- Page 14 without re-entering after power up. Error checking is not done at this time. The motor should not be running when a stored program is created. Example XD1 MI A50 V200 D500000 G D-100000 V300 A10 G XE The program defines stored program #1. This program contains 49 characters including the space at the end.
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Page 15: Electrical
The inputs and fault output can be programmed for a different function for OEM customers. Consult the factory if you have a need for this option. PMC drives come pre tested and adjusted for the motor that is supplied with the unit. No further adjustments are necessary. - Page 16 Drive Specification Environmental – Operating Performance (unloaded motor) Repeatability: ±5 arc-seconds (unidirectional) Driver: 0 to 60 °C measured at the heatsink Accuracy: ±5 arc-minutes (bidirectional) Motor: 80 °C measured at motor case Step-to-Step Accuracy: ±20 arc-seconds (unidirectional) Ambient: 10 to 40 °C, 0 to 95% humidity, non-conducting Inputs (optically isolated): Environmental- Storage 5 VDC, TTL typical...