PLD545 Stepper motor driver I N S T R U CT I O N M A N U A L 01. 02. 03. 04. 05. 06. 07. 08. 09. 10. 11. General information Delivery set Technical features Driver installation and ventilation Driver functional capabilities Controlling signals connection Current and supply option Stepper motor connection to the driver Protection functions, setup Step division option Terms of Warranty 2 2 3 5 6 6 7 10 12 13 13
01. General information! Check for more information. 01 General information PLD545 is an available microstepping stepper motor driver. The driver has inbuilt coil short-circuit protection, back EMF effect protection, inbuilt automatic compensator of normal speed stepper motor resonance, modifications scheme of phase current. The driver works with standard control protocol STEP/DIR/ENABLE. The driver has discrete adjustment of working current. All driver control inputs are optoisolated and logic levels 2.5V, 3.3V, 5V compatible. The driver is AUTO-SLEEP mode supplied which is turned on when there is no STEP signal. The device is the optimal for control of bipolar and unipolar Purelogic R&D stepper motors (PL42/PL57 series) as well as other stepper motors. 02 Stepper motor driver PLD442 1 pcs. Instruction manual 1 pcs. Delivery set Technical features Module power supply Operating current of stepper motor driver Stepdivision (microstep) STEP Max signal frequency Max shaft rotation frequency Isolation resistance Operating temperature Unit weight without packaging Power off device before making any connections. 18...45V (bogey value 40V) 0.8, 2, 3, 3.5, 4, 4.3, 4.7, 5А (discrete adjustment) 1:4, 1:8, 1:16, 1:32 320 khz 140 cycles per second or 8400 cycles per minute (PL57H76, 45V, step division 1:8, 230 khz) 500 MOhm 0...60 С 0,3 kg Do not mount the power switch after the power source (on the driver power line). Power switch should be installed before power supply, at ~220V side. Do not connect the drivers in series, only star connection is allowed. Do not connect power supply s «-» to ground, mass, housing, etc. 03 Strictly observe the polarity of power supply and control signals connections. 3
03. Technical features Driver installation and ventilation 04 In order to ensure optimal thermal conditions of installation of the equipment inside the rack CNC control must be carried out, adhering to the scheme below: Fig. 1. Stermotor driver PLD545 dimensions Installing environmental conditions 1) Working environment temperature: 0~45 C. 2) Work environment humidity: lower than 40~80% (non condensing). 3) Storage environment temperature: -40~55 C. 4) Storage environment humidity: lower than 80% (non condensing). 5) Vibrate: lower than 0.5G. 6) Avoid direct sunlight. 7) Prevent oil mist, erosion of salt. 8) Prevent corrosive liquid, gas. 5
05. Driver functional capabilities 05 Optoisolation of module control signals STEP/DIR/ENABLE. Expanded discrete adjustment of working current in stepper motor coils. AUTO-SLEEP mode, driver after 1 sec standstill (lack of STEP signal) automatically enters rotor hold mode (full/half operating current) for heating reduction. Coil short-circuit module protection, wrong stepper motor connection protection, overheating (protection against back EMF effect). Inbuilt automatic compensator of normal speed stepper motor resonance. Scheme of phase current change form with frequency increase (morphing, switching from microstep mode to step mode with frequency increase. Convenient dismountable clip connectors to step motor, power source and control signals. 06 Driver functional capabilities Controlling signals connection Standard signals STEP/DIR/ENABLE are used to control the module. The signals are transmitted to optoisolated inputs. The differential scheme is used for interference immunity increase and provides with opportunity to connect the module to any driver controlling system. The scheme of differential input device and connection method to the controller with outputs open collector type is shown in fig. 2. STEP signal characteristics are working voltage 2.5V, 3.3V, 5V (you may need extra current-limiting resistor connection), current consumption up to 20mА, min signal duration is 2ms. The step is carried out on the signal front edge. DIR signal characteristics are working voltage 2.5V, 3.3V, 5V (you may need extra current-limiting resistor connection), current consumption up to 20мА, action time is 200 nsec before/after front edge STEP. ENABLE signal characteristics are working voltage 2.5V, 3.3V, 5V (you may need extra current-limiting resistor connection), current consumption up to 20mА, action time is 100 ms. Fig. 2. Differential inputs device Current and supply option 07 Max supply voltage driver option depends on the applied stepper motor and desired max rotation speed. Optimal supply voltage calculation for the stepper motor is carried out according to the formula U=32*v (stepper motor phase inductance mh), but not more than 45V. Supply current must be chosen 50...70% from the claimed stepper motor coil current. Working current setting is carried via DIP-switches SW1 SW3. When there is no STEP signal more than 1 sec, the driver goes to AUTO-SLEEP mode and reduces the coil current to the value identified by dip-switch SW6. This allows to reduce stepper motor overheating when in standstill and reduce current consumption. 7
07. Current and supply option Stepper motor driver Fig. 4. General scheme of CNC control 9
07. Current and supply option Power off device before making any connections. For back EMF compensation it is recommended to use a protection device dumper (PLZ005 module). 08 Stepper motor connection PLD545 driver is optimal for bipolar and unipolar stepper motors Purelogic R&D series PL42/PL57. Stepper motor connection to the driver is performed as it is shown in fig. 2 (clips PH1.1[+A], PH1.2[-A] и PH2.1[+B], PH2.2[-B]). The driver has protection against wrong stepper motor coil connection and coils linked together / + power supply. Purelogic R&D stepper motor connection to the driver is performed according to fig. 3. Please note in case of changing phases PH1.x<>PH2.x, the motor will start rotating in the opposite direction ( inversion analogue of DIR signal). The length of wires leading to the stepper motor from the driver must not exceed 10 meters. Longer wires can lead to driver s work failures. It is strongly recommended to interlace the stepper motor wires per phase, then put this braid to the screened metal sheathes. Sheathes and stepper motor frame must be grounded. PH1.1 [+А] PH1.2 [-А] PH2.1 [+B] PH2.2 [-B] Red (RED) Orange (ORG) Blue (BLU) Green (GRN) Fig. 3. Purelogic R&D stepper motor connection to the driver Fig. 5. Stepper motor driver connection scheme 11
09. Protection functions, setup 09 Protection functions, setup Power off device before making any connections. The driver has protection against wrong stepper motor coil connection and coils linked together / + power supply. In some cases by interturn short-circuit of stepper motor coil, short-circuit protection may not work because there is no exceeding of permissible alarm current. This happens because under such coil short circuit resistance does not equal 0 and the driver maintains the specified current. Protection against voltage jumps protection function operates when there is more than 45V power supply, for driver protection against back EMF effect. Automatic compensator of mid frequency stepper motor resonance is an electronic scheme which allows to eliminate mid frequency resonance. It is turned on automatically when finding the resonance. It appears in this range: 6-12 cycles per second. After turning on power supply, red and green LEDs flash on. When there is no alarm red LED goes out in 1 sec, the green one stays ON (if ENABLE=1 green LED goes out, if ENABLE=0 green LED is on). When protection function operates, the driver disconnects stepper motor coils, red error LED is on, the green one goes out. The driver restores its work after alarm removal and turning on/off power voltage. Phase current adaptation (stepper motor smooth running) is carried out by PHASE TRIM potentiometer when vibrations and uneven stepping at low revs is found. Adaption strategy is as follows: 1) A potentiometer is set to the extreme left position (minimum value). 2) Stepper motor is connected, voltage is supplied, vibration frequency is set up by STEP frequency generator. 3) When smoothly rotating PHASE TRIM potentiometer clockwise, the vibration reduces. You may fail to reduce vibrations totally because of a stepper motor specifics. When removed from one frequency, vibrations can appear in another frequency. Therefore it is necessary to choose the most suitable way of setting. Step division option The driver allows to divide electronically physical stepper motor step 4, 8, 16, 32. Thus positioning accuracy is higher. Step division mode is called microstep division. This mode allows to reduce stepper motor resonances at low revs. It is recommended to use PLD545 driver in step division 1:16, 1:32. In these modes stepper motor rotates as smooth as possible, low-frequency vibrations are minimal, automatic compensator of mid frequency stepper motor resonance performs best. Switching step division mode is carried out by DIP-switch SW4 and SW5 according to the scheme on the driver case. Power off device before making step division choice Terms of Warranty The warranty period is 12 months after purchasing and is valid only if all operational conditions and scheduled maintenance are strictly followed. 1. General terms 1.1. In case of product acquisition as separate components, Seller guarantees working ability of every component, but does not assume responsibility for the quality of their joint work (mismatch of components). If you have questions please consult our technical support team. 1.2. Seller does not guarantee compatibility of the purchased product with the one that Buyer already has or bought from third parties. 10 11 13
11. Terms of Warranty 1.3. Product s component parts and configuration can be changed by manufacturer without notice due to the product consistent technical improvement. 2. Conditions for warranty acceptance 2.1. The product is accepted only in the same completeness of set as it was purchased. 4.8. The product with defects which were caused by low-quality spare parts or fulfilled their service life spare parts,consumable materials, also using spare parts, consumable materials not corresponding with manufacturer s requirements. 3. Warranty service procedure 3.1. Warranty service is performed by testing the claimed product defect. 3.2. If the defect is proved, warranty repair is carried out. 4. We do not assume any responsibility for glass, electric lamps, starters and expendable materials as well as: 4.1. Damaged product caused by inappropriate transport and store conditions, wrong connection, operation in abnormal (off-design) mode, or in conditions which are not manufacturer-supplied (including temperature and humidity out of limits of recommended range), having damages due to third-party circumstances (voltage jumps, natural disasters, etc.), also having mechanical or thermal damages. 4.2. The product with traces of foreign objects or substances impact, including dust, liquids, insects, also objects having extraneous inscription. 4.3. The product with traces of unauthorized tampering and (or) repair process (traces of opening, home-made soldering, elements changing etc). 4.4. The product with self-diagnostic function that shows improper exploitation. 4.5. Technically complex product in respect of which assembly and integration and start-up works were not performed by Seller specialists or by recommended organizations, except in cases directly regulated under goods documentation. 4.6. In cases when the product exploitation was performed in conditions when power supply did not correspond with manufacturer s requirements, also when there is no electrical protection device. 4.7. The product which was resold by the initial buyer to the third party. Produced and accepted in accordance with obligatory requirements of valid technical documentation and is qualified for exploitation. Lot number: Technical Control Department 15
We draw your attention to the fact that there can be some changes in this instruction due to the product consistent technical improvement. You can always download our latest versions at www. purelog i c. r u Contacts Moscow +7 (495) 505-63-74 Voronezh +7 (473) 204-51-56 149 Office 160, Leninsky avenue, Voronezh, Russia, 394033 Monday - Thursday: 8.00 17:00 Friday: 8.00 16.00 Break: 12.30 13.30 sales@purelogic.ru