The transducer application on numerical control lathe

It Saves The Doubled Cost For Customers Of Machine Tool And Has High Reliability To Create More Profit For Customers.

Key Words: Numerical Machine Tool Sensorless Vector Inverter Low Frequency Torque 1.

At present servo of main shaft of machine tool of domestic numerical control basically uses foreword to shed servo continuously, and the main shaft servo that uses communication timing partly counts an import entirely, the price is high, other asynchronous machine communicates transmission system great majority to also use entrance transducer, this not only make national loss many foreign currency, and restricted domain of electron of our country electric power badly of industry of new and high technology form and develop. Homebred transducer uses V/F control mostly, because rotate speed precision suffers,turn poor rate and laden influence, cannot control the actual rotate speed of electromotor accurately, existing to control precision difference of low, dynamic function, fault rate function of tall, control is little wait for defect, and the compensation that heightens stator tension matchs completely with load hard, low speed torsion is insufficient. The drive that because this V/F controls transducer,does not apply to the requirement such as main shaft of machine tool of such as numerical control, servo to be answered high accuracy, quickly especially is mechanical. The article basically introduces KV2000 of division Mu dragon not to have the function with distinctive transducer of speed sensor vector and superior sexual value to compare, and the success application on numerical control machine tool. 2.

Machine tool of numerical control of brief introduction of numerical control machine tool is the Electromechanical unifinication product that will 30 years apply the multinomial technology such as market mechanism, electric, hydraulic pressure, pneumatic, microelectronics and information integratedly to be an organic whole, have in mechanical production equipment agile, general, high accuracy, efficient " flexible " automation produces equipment, it wants treatment process place the appearance measure of all sorts of operations and measure and workpiece, with digitlization code, send numerical control unit through controlling medium, numerical control device has processing and operation to the information of the input, the instruction controls machine tool system and drive element, automatic treatment gives the work of a need. The technical level discretion of numerical control machine tool reachs his to machine machine tool crop and the percent that always have an amount in metallic cutting, it is to measure progress of economy of countryman of a country and industry to make one of important marks of integral level. In recent years the numerical control machine tool of our country enterprise has rate year after year to rise, in big in the enterprise already had more use, in medium and small businesses in individual even business begin generally also to use. 3.

Transducer uses the introductory KV2000 series that division Mu dragon does not have characteristic of feeling vector transducer not to have speed sensor vector advancedly to control a technology, electric machinery is when low speed torsion is big, have 0 servo function, running frequency has the torsion output of 100% when 0Hz, and speed precision is tall, the price is reasonable, the function is all ready, can diagnose the parameter that electric machinery trends runs automatically to be made adjust accordingly, in order to make sure electric accident turns in highest efficiency condition, accordingly, without speed sensor vector transducer can replace communication servo, it is choice of first-rate of machine tool industry. Compare as a result of the tall sex price of transducer to the client, so transducer is used on lathe very general. 1) technology is advanced, the structure is compact, product exterior beauty is easy; 2) controls means to do not have speed feedback vector, control function relatively the VF control means previously has very substantially improvement, satisfy the requirement of machine tool main shaft on low speed torsion especially, 0.

Torsion starts to be able to achieve 150% above when 5HZ; Limits of frequency of 3) carrier wave 0 ～ 16.

9KHz, ensure high static sound runs electric machinery; 4) power limits 0.

75kw ～ 500kw, output frequency limits 0.

0 ～ 650.

0Hz, suit the applied territory of machine tool of high speed numerical control; The imitate of 0 ～ 10V that 5) provides a standard measures interface (input impedance 300Kohm) , can accuse systematic interface with most number compatible, versatility is strong; 4.

Debug environment and wiring, debug methodological 1) 3.

Parameter of electromotor of lathe of 7kW numerical control: Rated power: 3.

7kW, rated frequency: 50Hz, rated voltage: 380V, rated electric current: 8.

6A, rated rotate speed: 970r/min 　 mechanical drive compares: 1: 1.

5 　 process data: 45# steel checks function index actually: Main shaft rotate speed: 200r/min (15Hz of transducer running frequency is controlled) , feed speed: 50mm/min, unilateral feed measures: 2.

5mm, the effect that move is very good, effective feed rate and unilateral feed quantity still can be increased. 2) 5.

Parameter of electromotor of lathe of 5kW numerical control: Rated power: 5.

5kW, rated frequency: 50Hz, rated voltage: 380V, rated electric current: 13A, rated rotate speed: 1400r/min 　 mechanical drive compares: 1: 1.

5 treatment material: 45# steel checks function index actually: Main shaft rotate speed: 200r/min (transducer running frequency 9 ～ 10Hz) , feed speed: 60mm/min, unilateral feed measures: 2mm; Main shaft rotate speed: 450r/min (22Hz of transducer running frequency is controlled) , feed speed: 60mm/min, unilateral feed measures: 4mm, the effect that move is very good, effective feed rate and unilateral feed quantity still can be increased. Machine of client choosing distribution is 3.

7KW/50Hz/380V, choose transducer model to be KV2000-G0037C-4T, resistor of apply the brake 1000 tile / 100 ohm. V1/GND terminal offers transducer to be measured with imitate of speed of numerical control system, v1 receives imitate of numerical control system to measure interface signal, GND receives negative signal, signal is signal of voltage of imitate of 0 ～ 10V, control main shaft rotate speed. FWD/REV/COM is transducer turning / invert signal terminal, give out by numerical control system normally turning signal FWD perhaps inverts REV, come drive auxiliary relay, of auxiliary relay often open contact to receive transducer FWD/ COM or 　 REV/COM, the positive and negative that controls transducer thereby turns. Parameter installs as follows: 1) F001 and F002 are quicken time and slowdown time, according to the client's requirement, f001=2S, f002=1S; 2) F010 and F011 are installed according to electric machinery nameplate, f010=50Hz, f011=100; 3) F015 upper limit operates frequency choice, the correspondence output at the transducer when imitate signal 10V is inputted frequency, because be to be inside limits of 0 ～ 3500rpm timing, will mechanical decelerate calculates than this after going in, this parameter needs a setting to be 150Hz; 4) F039 parameter is set of locomotive signal origin, the setting is control of outside terminal signal, f039=2.

0; 5) F040 parameter is a choice advocate origin of frequency input set, the setting is imitate signal input of 0 ～ 10V, f040=1.

0, namely CNC imitate outputs signal; 6) F067 is the option that controls fashion, need chooses vector control, f067=3, namely transducer moves at controlling figure system without speed sensor vector, offer additional torsion to compensate voltage, besides increase electric machinery low speed to run torsion besides, and can compensate load raise the slippery difference that create. 5.

Main shaft of machine tool of last word numerical control communicates vector of brand of servo, entrance to control transducer and frequency conversion commonly composition of special electric machinery, purchase cost very tall; Transducer of series of KV2000 of division Mu dragon is mixed with its distinctive function superior sexual value is compared, rise abruptly quickly on the application of numerical control machine tool, become at present a powerful new force, the client that is machine tool industry reduces the cost cost of about one times, and reliability is high, create more benefit for the client. Bibliographical reference: [1] division Mu dragon is electric (Asia) limited company " KV2000 does not have transducer of speed sensor vector " user manual 　 [2] limited company of technology of numerical control of emperor of Beijing triumphant favour " KND - system of 100T lathe numerical control " the user uses manual CNC Milling