The stage amounts to the transducer application in numerical control machine tool

  • Time:
  • Click:132
  • source:EASCOR CNC Machining
One, the technical level discretion of machine tool of brief introduction numerical control 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. Numerical control lathe is one of main breed of numerical control machine tool, it has very important place in numerical control machine tool, will a few years be taken seriously generally of world each country all the time, got rapid development. Main shaft is lathe an important part in forming, machine efficiency to rising, enlarge machines material limits greatly, promotion machines quality to having very main effect. Great majority of lathe of economy numerical control is cannot of automatic gearshift, when needing speed change, can stop the machine tool only, next the hand uses speed change. And of lathe of complete function numerical control advocate transmission system uses infinitely variable speeds mostly. Current, system of infinitely variable speeds basically has system of frequency conversion main shaft and system of servo main shaft two kinds, use dc or electric machinery of communication main shaft commonly. Rotate through taking transmission to drive main shaft, or through bringing the decelerate gear inside transmission and main shaft box (in order to obtain bigger torsion) drive main shaft to rotate. Because range of timing of main shaft electric machinery is wide, but stepless speed regulation, make the structure of winner axle box simplifies greatly. Compare as a result of the tall sex price of transducer to the client at present, so transducer is used on lathe very general. The stage amounts to M series transducer with its distinctive function and superior sexual value are compared, rise abruptly quickly on the application of numerical control machine tool, become at present a powerful new force. 2, the introduction of transducer characteristic 1. Volume is minor, belong to confuse you model product, take up control ark space is lesser; 2. Control means is sine wave SPWM (offer without speed feedback vector is controlled) , control function relatively the improvement that the VF previously controls means to very great performance goes up, satisfy the requirement of machine tool main shaft on low speed torsion especially, torsion starts to be able to achieve 150% above when 5HZ; 3. 0-15KHz of limits of carrier wave frequency, reduce the electromagnetism noise of electric machinery; 4. The 0-10V imitate that provides a standard measures interface (input impedance 47Kohm, output impedance 250Kohm) , can accuse systematic interface with most number compatible, versatility is strong; 5. Overload capability is strong, rated output electric current exceeds 150% above one minute; 6. Provide muti_function output terminal signal, for example 0 fast signal, the signal in movement, speed arrives at signal, breakdown directive, contented system the monitoring to position of main shaft career; 7. Automatic torsion is compensated, main shaft of contented machine tool machines demand in what low speed circumstance falls; 8. Provide 3 groups of unusual records, know the moving state with machine tool actual main shaft from flank for maintenance technician; 9. Electric machinery parameter rectifies calm function automatically, online identifying electric machinery parameter, assure systematic stability and accuracy. 3, debug environment and wiring, debug methodological client to select distribution engine for 3.

0KW/50Hz/380V, choose transducer model to be VFD037M43, 400W/150ohm of resistor of apply the brake. AVI/GND terminal offers Nextpage transducer to be measured with imitate of speed of numerical control system, AVI receives imitate of numerical control system to measure interface signal, GND receives negative signal, signal is signal of 0-10V imitate voltage, control main shaft rotate speed. M0/M1/GND 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 M0/GND or M1/GND, the positive and negative that controls transducer thereby turns. The process is adjusted in parameter in, need attention: 1. P00 parameter is a choice advocate origin of frequency input set, the setting is inputted for imitate signal 0-10V (1) ; 2. P01 parameter is set of locomotive signal origin, the setting is controlled for outside terminal signal (2) ; 3. Frequency of P03 highest operation chooses, the correspondence output at the transducer when imitate signal 10V is inputted frequency, because be to be inside 0-3500rpm limits timing, will mechanical decelerate calculates than this after going in, this parameter needs a setting to be 184HZ; 4. P04 and P05 are installed according to electric machinery nameplate, p04=50Hz, p05=380V; 5. P10 and P11 are quicken time and slowdown time, according to the client's requirement, p10=5S, p11=5S; 6. P105 is the option that controls fashion, need chooses vector control, p105=1; Need to notice particularly, because vector controls need to offer electric machinery parameter (impedance) , transducer offers electric machinery parameter to rectify calm function P103 oneself, choose P103=2, run key through face plate, transducer can move automatically. In running a course automatically, give electric machinery parameter besides computation beyond, still can detect clean carries electricity, it these a few parameter can show higher performance to vector control is very important that these a few parameters can show higher performance to vector control, this process can last ten seconds time. Carrying out before rectifying calm function oneself, must affirm whether electric machinery side does not have any join, include decelerate leather belt. 4, debug a result to check a result to be as follows: Express 1 sky to carry electric current to check a result to express 2 load current to check a result from on the frequency that the watch can see in constant torsion is outputted paragraph (0-50Hz) , vector pilot carries electric current to have VF pilot in part only almost for nothing, the electric current when load is a few smaller than VF also; And when laden cutting, VF control has apparent speed to drop in initial stage, and idling speed and laden speed have greater poor value. And opposite Yu Shi measures control, although initial stage of main shaft rotate speed also can have drop, but drop the value is lesser, and speed is met pick up very quickly, final idling speed and laden speed differ is not apparent. Above the course debug, compare original VF control, function had very big improvement, no matter from carry electricity for nothing, low speed moment of force, still be the change of speed, the effect is very apparent, can satisfy the requirement of numerical control machine tool completely. CNC Milling CNC Machining