https://maxonmotorspeedcontroller.com Sat, 18 Jul 2026 04:35:42 +0000 en-US hourly 1 https://wordpress.org/?v=4.1.1 https://maxonmotorspeedcontroller.com/2026/07/13/2-2kw-220v-vfd-inverter-drive-ac-motor-speed-controller-variable-12a/ https://maxonmotorspeedcontroller.com/2026/07/13/2-2kw-220v-vfd-inverter-drive-ac-motor-speed-controller-variable-12a/#comments Mon, 13 Jul 2026 16:25:42 +0000 https://maxonmotorspeedcontroller.com/2026/07/13/2-2kw-220v-vfd-inverter-drive-ac-motor-speed-controller-variable-12a/ […]]]>








Input 220V to Output 380V VFD Variable Frequency Drive Converter Inverter 0.75/1.5/2.2/3.7/4/5.5 KW Motor Speed Controller. 2.1A – 13A. AC/AC Inverter(for 3 phase motor only). 1KGS – 1.5KGS. Rated power: 0.75kw/1.5kw/2.2kw (for 220V to 380V type). Rated output current: 2.1A(for 0.75kw)/3.8A(for 1.5kw)/5.1A(for 2.2kw). Input voltage: 1 phase 220v. Output voltage: 3 phase 380v. Mounting hole dimension: 61x81mm. Rated power: 3.7kw/5.5kw (for 220V to 380V type). Rated output current: 9A(for 3.7kw)/13A(for 5.5kw). Net Weight: 1.4kgs. Optional external control panel(not included in the package). Most of the time, we are readily available with stock, and the item is dispatched within the committed time frame. In rare cases, we have issues with the supply chain! We will try our level best to entertain you at the earliest in the following available timings! We offer a 30-Day Return In Case of Item Damage, Wrong Item, Missing Item, Size Issue etc. We will provide return address. Please DO NOT use the address on the parcel to return. We HOPE to Serve You More!!! Class=”extend–iframe–to7hHIV” data-spm-anchor-id=a2g0o. E80ex2bKx2bKe5″ style=”box-sizing: border-box; -webkit-tap-highlight-color: transparent; outline: 0px; margin: 0px; padding: 0px; height: 6937.13px; position: absolute; top: 0px; visibility: hidden; width: 1194.57px; z-index: -1;>.

]]> https://maxonmotorspeedcontroller.com/2026/07/13/2-2kw-220v-vfd-inverter-drive-ac-motor-speed-controller-variable-12a/feed/ 0 https://maxonmotorspeedcontroller.com/2026/07/10/2-2kw-single-to-3-phase-variable-frequency-drive-inverter-cnc-motor-speed-vfd-2/ https://maxonmotorspeedcontroller.com/2026/07/10/2-2kw-single-to-3-phase-variable-frequency-drive-inverter-cnc-motor-speed-vfd-2/#comments Sat, 11 Jul 2026 04:20:43 +0000 https://maxonmotorspeedcontroller.com/2026/07/10/2-2kw-single-to-3-phase-variable-frequency-drive-inverter-cnc-motor-speed-vfd-2/ […]]]>












Made of fine quality frequency converter has nice durability and long service life. It has fine performance and strong function. Human design keyboard with proper and clear digital display screen is easy to operate. Fine heat dissipation system can extend the service life. Drive board is waterproof, dampproof and electrostatic protections. Features: Direct current cooling fan low noise, long life, large air volume. Three anti-paint protectionlines, improve and extend the life of the fuselage. The machine is screwed to ensure the safety and reliability of the use. Spacing 2.54mm bar connector, 5-pin plug. This VFD uses distinctive control method to realize high torque, nice precisions and wide speed regulatingrange driving, with fine performance. It has fine anti-trip performance and ability to adapt to rough power, temperature, humidity and dust interference, greatly improved stability. By optimizing PWM control technology and electromagnetic compatibility, it satisfies users’ requirement of low noise, low electromagnetic interference. Simple to operate and wire, connect to wires after removing screws. Fast starts and stop response, large torque at low speed. Specifications: Name: Variable Inverter Model: AT1-2200S VER: A03 Source: 200V AC, HZ50/60 (single phase) Capacity: 4.0KVA(1.5KW/2HP) Output Current: 8A Application Range: universal Phase: Single Phase Adaptation Motor Power: 2.2KW Filter: built-in filter Control Method: V/F closed loop Output Voltage Regulation Mode: PWM control Rated Current: 12A Item Weight: 1137g / 2.51lb Package Weight: 1315g / 2.90lb Item Size: 195 130 110mm / 7.68 5.12 4.33in Package size: 215 200 160mm / 8.45 7.87 6.30in. Button: DISP: Switch monitoring parameters at monitoring state, at secondary menu, move data box to process editing position. PROG: Exit current(or present) state, switch among each states, mainly used to switch monitoring state, exit to previous menu. FUNG/DATA: Enter menus step-by-step, save setting parameters. Up: Press or press and hold to add data or function code. Down: Press or press and hold to minus data or function code. STOP/RESET: VFD stops running 2, restore to interface before error. Knob: Adjust rotational speed. Packing List: 1 Variable Inverter 1 Manual.

]]> https://maxonmotorspeedcontroller.com/2026/07/10/2-2kw-single-to-3-phase-variable-frequency-drive-inverter-cnc-motor-speed-vfd-2/feed/ 0 https://maxonmotorspeedcontroller.com/2026/07/09/2-2kw-single-phase-to-3-phase-motor-drive-vfd-frequency-speed-controller-ac2-bl/ https://maxonmotorspeedcontroller.com/2026/07/09/2-2kw-single-phase-to-3-phase-motor-drive-vfd-frequency-speed-controller-ac2-bl/#comments Thu, 09 Jul 2026 16:16:57 +0000 https://maxonmotorspeedcontroller.com/2026/07/09/2-2kw-single-phase-to-3-phase-motor-drive-vfd-frequency-speed-controller-ac2-bl/ […]]]>








Adopt voltage vector type control, widely used 2. Complete control port, can be used with PLC and sensor in various automation equipment 3. Built-in PID controller for applications requiring constant pressure, constant temperature, constant tension open loop control and closed loop control 4. Textile swing frequency function, can be applied to textile machinery 5. 0 speed brake function, can be used for truck crane lifting and other occasions. Adopt voltage vector type control, widely used. Complete control port, can be used with PLC and sensor in various automation equipment. Built-in PID controller for applications requiring constant pressure, constant temperature, constant tension open loop control and closed loop control. Textile swing frequency function, can be applied to textile machinery. Built-in synchronous control function. Soft start function to protect equipment. High-frequency control function, the use of high-speed spindles such as textile engraving machines. Generally used in the control of the speed on the material rack, synchronous operation on the pipe machine and energy-saving on the air compressor. Input Power: Single phase AC220V. Output Voltage: Three-Phase AC220. Output Voltage Regulation Mode: PWM control. Control Method: Voltage vector. Adapted Motor Power: 2.2KW 3HP. Frequency Control Range: 0-600Hz. 160 x 135 x 80mm / 6.3 x 5.3 x 3.1in. 1239g / 43.7oz. 1 x Speed Controller. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.

]]> https://maxonmotorspeedcontroller.com/2026/07/09/2-2kw-single-phase-to-3-phase-motor-drive-vfd-frequency-speed-controller-ac2-bl/feed/ 0 https://maxonmotorspeedcontroller.com/2026/07/07/4kw-universal-variable-frequency-drive-energy-saving-motor-speed-controller-for-2/ https://maxonmotorspeedcontroller.com/2026/07/07/4kw-universal-variable-frequency-drive-energy-saving-motor-speed-controller-for-2/#comments Tue, 07 Jul 2026 16:11:56 +0000 https://maxonmotorspeedcontroller.com/2026/07/07/4kw-universal-variable-frequency-drive-energy-saving-motor-speed-controller-for-2/ […]]]>























MULTI STAGE CONTROL: 8 stage programmable realize multi stage speed control, optional multiple operation modes, simple PLC operation, optional torsion or speed control mode 2. ANALOG INPUT OUTPUT: Come with standard RS485 RTU mode, multiple analog input or output of 0-5v, 0-10v, 4-20ma, 0-20ma 3. CONSTANT PRESSURE WATER AND WIND: Adopt PID control, constant pressure water supply, wind pressure constant pressure control, environmental protection and energy saving, low noise, low electromagnetic interference 4. STEPLESS REGULATION AND ENERGY SAVING: Low frequency and high torsion energy saving, multiple motor protection methods, stepless speed regulation 5. VARIOUS PROTECTION: Possess overcurrent, overvoltage and undervoltage, module failure, overheating, short circuit, input and output phase loss, abnormal adjustment of motor parameters, electronic thermal relay and other protection methods. Item Type: Variable Frequency Drive Model: AT904-4KW Input Voltage: Single phase 220VAC 50/60Hz Output Voltage: Three phase 0-380VAC 0-400Hz Maximum Output Current: 20A Adapted Motor Power: 4KW (6HP) Filter: Built in filter Application: General purpose DC Power Supply Properties: Voltage type Control Mode: V/F open loop Output Voltage Regulation Mode: PWM control Appearance: ABS plastic shell Product Size: Approx. 25 x 18 x 16.5cm / 9.8 x 7.1 x 6.5in(manual measurement with certain error) Uses: Control the start, stop, speed regulation and CW and CCW rotation of the motor to meet the conditions required for production or equipment use, widely used in fans, pumps, air compressors, etc. 1 x Variable Frequency Drive. 1 x User Manual. Select a compatible motor to use, you must choose a 380V three phase motor with a power less than 4KW and adjustable speed. According to the wiring method of the manual, connect the power supply and the three phase motor. Select the appropriate operation mode according to the needs of the application scenario, and refer to the manual for mode selection. Power on, the speed of the motor and CW and CCW rotation can be adjusted according to the knob on the panel. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.

]]> https://maxonmotorspeedcontroller.com/2026/07/07/4kw-universal-variable-frequency-drive-energy-saving-motor-speed-controller-for-2/feed/ 0 https://maxonmotorspeedcontroller.com/2026/07/02/abb-acs601-11kw-vfd-drive-400v-3-phase-inverter-25a-motor-speed-controller/ https://maxonmotorspeedcontroller.com/2026/07/02/abb-acs601-11kw-vfd-drive-400v-3-phase-inverter-25a-motor-speed-controller/#comments Thu, 02 Jul 2026 15:59:43 +0000 https://maxonmotorspeedcontroller.com/2026/07/02/abb-acs601-11kw-vfd-drive-400v-3-phase-inverter-25a-motor-speed-controller/ […]]]>









ABB ACS601 AC drive, designed for precise motor speed and torque control in demanding industrial applications. This unit is part of ABB’s ACS600 series, known for reliability and high-performance variable speed control. Rated at approximately 11kW with a 400V 3-phase supply, this drive is suitable for a wide range of machinery including pumps, fans, conveyors, and process equipment. The ACS601 series features robust construction, advanced control capabilities, and flexible integration into automation systems. New without original packaging. Designated trademarks, brand names and brands appearing herein are the property of their respective owners. We try to describe items as accurately as possible. Please message us and we will be happy to help you.

]]> https://maxonmotorspeedcontroller.com/2026/07/02/abb-acs601-11kw-vfd-drive-400v-3-phase-inverter-25a-motor-speed-controller/feed/ 0 https://maxonmotorspeedcontroller.com/2026/06/28/4kw-universal-variable-frequency-drive-energy-saving-motor-speed-controller-for/ https://maxonmotorspeedcontroller.com/2026/06/28/4kw-universal-variable-frequency-drive-energy-saving-motor-speed-controller-for/#comments Mon, 29 Jun 2026 03:52:49 +0000 https://maxonmotorspeedcontroller.com/2026/06/28/4kw-universal-variable-frequency-drive-energy-saving-motor-speed-controller-for/ […]]]>























MULTI STAGE CONTROL: 8 stage programmable realize multi stage speed control, optional multiple operation modes, simple PLC operation, optional torsion or speed control mode 2. ANALOG INPUT OUTPUT: Come with standard RS485 RTU mode, multiple analog input or output of 0-5v, 0-10v, 4-20ma, 0-20ma 3. CONSTANT PRESSURE WATER AND WIND: Adopt PID control, constant pressure water supply, wind pressure constant pressure control, environmental protection and energy saving, low noise, low electromagnetic interference 4. STEPLESS REGULATION AND ENERGY SAVING: Low frequency and high torsion energy saving, multiple motor protection methods, stepless speed regulation 5. VARIOUS PROTECTION: Possess overcurrent, overvoltage and undervoltage, module failure, overheating, short circuit, input and output phase loss, abnormal adjustment of motor parameters, electronic thermal relay and other protection methods. Item Type: Variable Frequency Drive Model: AT904-4KW Input Voltage: Single phase 220VAC 50/60Hz Output Voltage: Three phase 0-380VAC 0-400Hz Maximum Output Current: 20A Adapted Motor Power: 4KW (6HP) Filter: Built in filter Application: General purpose DC Power Supply Properties: Voltage type Control Mode: V/F open loop Output Voltage Regulation Mode: PWM control Appearance: ABS plastic shell Product Size: Approx. 25 x 18 x 16.5cm / 9.8 x 7.1 x 6.5in(manual measurement with certain error) Uses: Control the start, stop, speed regulation and CW and CCW rotation of the motor to meet the conditions required for production or equipment use, widely used in fans, pumps, air compressors, etc. 1 x Variable Frequency Drive. 1 x User Manual. Select a compatible motor to use, you must choose a 380V three phase motor with a power less than 4KW and adjustable speed. According to the wiring method of the manual, connect the power supply and the three phase motor. Select the appropriate operation mode according to the needs of the application scenario, and refer to the manual for mode selection. Power on, the speed of the motor and CW and CCW rotation can be adjusted according to the knob on the panel. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.

]]> https://maxonmotorspeedcontroller.com/2026/06/28/4kw-universal-variable-frequency-drive-energy-saving-motor-speed-controller-for/feed/ 0 https://maxonmotorspeedcontroller.com/2026/06/28/2-2kw-single-to-3-phase-variable-frequency-drive-inverter-vfd-cnc-motor-speed/ https://maxonmotorspeedcontroller.com/2026/06/28/2-2kw-single-to-3-phase-variable-frequency-drive-inverter-vfd-cnc-motor-speed/#comments Sun, 28 Jun 2026 15:51:44 +0000 https://maxonmotorspeedcontroller.com/2026/06/28/2-2kw-single-to-3-phase-variable-frequency-drive-inverter-vfd-cnc-motor-speed/ […]]]>












Made of fine quality frequency converter has nice durability and long service life. It has fine performance and strong function. Human design keyboard with proper and clear digital display screen is easy to operate. Fine heat dissipation system can extend the service life. Drive board is waterproof, dampproof and electrostatic protections. Features: Direct current cooling fan low noise, long life, large air volume. Three anti-paint protectionlines, improve and extend the life of the fuselage. The machine is screwed to ensure the safety and reliability of the use. Spacing 2.54mm bar connector, 5-pin plug. This VFD uses distinctive control method to realize high torque, nice precisions and wide speed regulatingrange driving, with fine performance. It has fine anti-trip performance and ability to adapt to rough power, temperature, humidity and dust interference, greatly improved stability. By optimizing PWM control technology and electromagnetic compatibility, it satisfies users’ requirement of low noise, low electromagnetic interference. Simple to operate and wire, connect to wires after removing screws. Fast starts and stop response, large torque at low speed. Specifications: Name: Variable Inverter Model: AT1-2200S VER: A03 Source: 200V AC, HZ50/60 (single phase) Capacity: 4.0KVA(1.5KW/2HP) Output Current: 8A Application Range: universal Phase: Single Phase Adaptation Motor Power: 2.2KW Filter: built-in filter Control Method: V/F closed loop Output Voltage Regulation Mode: PWM control Rated Current: 12A Item Weight: 1137g / 2.51lb Package Weight: 1315g / 2.90lb Item Size: 195 130 110mm / 7.68 5.12 4.33in Package size: 215 200 160mm / 8.45 7.87 6.30in. Button: DISP: Switch monitoring parameters at monitoring state, at secondary menu, move data box to process editing position. PROG: Exit current(or present) state, switch among each states, mainly used to switch monitoring state, exit to previous menu. FUNG/DATA: Enter menus step-by-step, save setting parameters. Up: Press or press and hold to add data or function code. Down: Press or press and hold to minus data or function code. STOP/RESET: VFD stops running 2, restore to interface before error. Knob: Adjust rotational speed. Packing List: 1 Variable Inverter 1 Manual.

]]> https://maxonmotorspeedcontroller.com/2026/06/28/2-2kw-single-to-3-phase-variable-frequency-drive-inverter-vfd-cnc-motor-speed/feed/ 0 https://maxonmotorspeedcontroller.com/2026/06/25/2-2kw-single-to-3-phase-variable-frequency-drive-inverter-cnc-motor-speed-vfd/ https://maxonmotorspeedcontroller.com/2026/06/25/2-2kw-single-to-3-phase-variable-frequency-drive-inverter-cnc-motor-speed-vfd/#comments Fri, 26 Jun 2026 03:46:43 +0000 https://maxonmotorspeedcontroller.com/2026/06/25/2-2kw-single-to-3-phase-variable-frequency-drive-inverter-cnc-motor-speed-vfd/ […]]]>












Made of fine quality frequency converter has nice durability and long service life. It has fine performance and strong function. Human design keyboard with proper and clear digital display screen is easy to operate. Fine heat dissipation system can extend the service life. Drive board is waterproof, dampproof and electrostatic protections. Features: Direct current cooling fan low noise, long life, large air volume. Three anti-paint protectionlines, improve and extend the life of the fuselage. The machine is screwed to ensure the safety and reliability of the use. Spacing 2.54mm bar connector, 5-pin plug. This VFD uses distinctive control method to realize high torque, nice precisions and wide speed regulatingrange driving, with fine performance. It has fine anti-trip performance and ability to adapt to rough power, temperature, humidity and dust interference, greatly improved stability. By optimizing PWM control technology and electromagnetic compatibility, it satisfies users’ requirement of low noise, low electromagnetic interference. Simple to operate and wire, connect to wires after removing screws. Fast starts and stop response, large torque at low speed. Specifications: Name: Variable Inverter Model: AT1-2200S VER: A03 Source: 200V AC, HZ50/60 (single phase) Capacity: 4.0KVA(1.5KW/2HP) Output Current: 8A Application Range: universal Phase: Single Phase Adaptation Motor Power: 2.2KW Filter: built-in filter Control Method: V/F closed loop Output Voltage Regulation Mode: PWM control Rated Current: 12A Item Weight: 1137g / 2.51lb Package Weight: 1315g / 2.90lb Item Size: 195 130 110mm / 7.68 5.12 4.33in Package size: 215 200 160mm / 8.45 7.87 6.30in. Button: DISP: Switch monitoring parameters at monitoring state, at secondary menu, move data box to process editing position. PROG: Exit current(or present) state, switch among each states, mainly used to switch monitoring state, exit to previous menu. FUNG/DATA: Enter menus step-by-step, save setting parameters. Up: Press or press and hold to add data or function code. Down: Press or press and hold to minus data or function code. STOP/RESET: VFD stops running 2, restore to interface before error. Knob: Adjust rotational speed. Packing List: 1 Variable Inverter 1 Manual.

]]> https://maxonmotorspeedcontroller.com/2026/06/25/2-2kw-single-to-3-phase-variable-frequency-drive-inverter-cnc-motor-speed-vfd/feed/ 0 https://maxonmotorspeedcontroller.com/2026/06/25/220v-to-380v-vfd-variable-frequency-drive-2-2kw-motor-speed-controller-2/ https://maxonmotorspeedcontroller.com/2026/06/25/220v-to-380v-vfd-variable-frequency-drive-2-2kw-motor-speed-controller-2/#comments Thu, 25 Jun 2026 15:45:44 +0000 https://maxonmotorspeedcontroller.com/2026/06/25/220v-to-380v-vfd-variable-frequency-drive-2-2kw-motor-speed-controller-2/ […]]]>



















220V to 380V VFD Variable Frequency Drive 2.2KW Motor Speed Controller. It is compatible with all types of motors, making it perfect for a variety of applications including water pumps, fans, and other motor-driven equipment. Advanced Control & Communication: Equipped with a 485 communication interface, the drive supports 8+16 adjustable speed segments and multi-interface communication settings. This flexibility allows for precise customization to meet your specific operational needs and system integration requirements. Smart Motor Management & Energy Savings: Featuring three core functions: intelligent motor speed regulation, constant pressure maintenance, and energy-saving operation. These capabilities not only enhance performance but also significantly reduce power consumption, making your systems more efficient and cost-effective. Comprehensive Protection & Enhanced Safety: Built with six layers of protection-over-voltage, over-current, short circuit, motor overload, overheating, and ground fault protection-this VFD ensures reliable and secure operation. Its robust design extends the lifespan of both the drive and connected motors while prioritizing safety. Design & Efficient Cooling: Powered by a dedicated variable frequency smart chip with moisture and static resistance, it performs high-speed calculations for accurate vector control. A powerful cooling fan enables quiet yet effective heat dissipation, maintaining stable performance even during prolonged use. An external operation panel with extension cable support allows for convenient and remote operation. Specification: Part Name: Variable Frequency Drive Color: Black Material: Plastic Model: SU600-2R2G1 Rated Current: 5A Power: 2.2KW Input Voltage: Single-phase 220V Output Voltage: Three-phase 380V Output Frequency: 50/60HZ Size: 147X72X118.4 (mm) Mounting Size: 136.5X63 (mm) Weight: 0.72Kg Package Content: 1Variable Frequency Drive Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. Please allow slight manual measurement deviation for the data. Please kindly note that. Also, the each additional item means. The the same color and size. Transit time may be a little delayed because of the. If you have any questions.

]]> https://maxonmotorspeedcontroller.com/2026/06/25/220v-to-380v-vfd-variable-frequency-drive-2-2kw-motor-speed-controller-2/feed/ 0 https://maxonmotorspeedcontroller.com/2026/06/23/aac-220v-1-5kw-variable-frequency-drive-vfd-speed-controller-for-3-phase-motor/ https://maxonmotorspeedcontroller.com/2026/06/23/aac-220v-1-5kw-variable-frequency-drive-vfd-speed-controller-for-3-phase-motor/#comments Tue, 23 Jun 2026 08:06:12 +0000 https://maxonmotorspeedcontroller.com/2026/06/23/aac-220v-1-5kw-variable-frequency-drive-vfd-speed-controller-for-3-phase-motor/ […]]]>







This VFD uses unique control method to realize high torque, high accuracy and wide speed regulating range driving, with high performance. It has good anti-trip performance and ability to adapt to rough power, temperature, humidity and dust interference, greatly improved stability. By optimizing PWM control technology and electromagnetic compatibility, it satisfies users’ requirement of low noise, low electromagnetic interference. Over current, over voltage, over heat, overload, under voltage, intelligent power module protection. Simple to operate and wire. Fast start and stop response, large torque at low speed. This Variable Frequency Drive is made of high quality shell material, heat resistant and flame retardant. Humanized keyboard design, easy to operate. Digital display screen makes it convenient to read clearly. Power supply phrase: Single phrase. Rated voltage: AC220V(single phrase) Power supply voltage: Low voltage Suitable motor power: 1.5 kW Suitable motor type: for 3-phase Motor. DC power supply: Current type. Control method: V/F open loop. Output voltage adjustable method: PWM control. 18 x 12.5 x 12cm / 7 x 4.9 x 4.7inch. 1 x Variable Frequency Drive. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Note that the inverter can not be used as a power supply, must be connected to the motor, there can be no switch between the inverter and the motor. In addition, the high-speed spindle motor needs to set parameters to be used.

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