20 problems that about servo electric machinery you may not know

How to choose servo electric machinery and pace correctly to enter electric machinery? Answer: Basically inspect specific application condition and decide, say simply to want to decide: Laden property (wait like level or perpendicular load) , torsion, inertia, rotate speed, precision, impose the requirement such as decelerate, position control asks on (the requirement that is like pair of port interfaces and communication respect) , main control means is the position, torsion or rate kind. Power supply source is dc or alternating current source, or batteries power supply, voltage limits. Deserve in order to decide electric machinery is mixed to use the model of driver or controller accordingly. Nextpage2.

Does choice pace take electric machinery or system of servo electric machinery? Answer: Actually, choose what kind of electric machinery to should be decided according to specific application circumstance, each have its characteristic. 3.

How to deserve to take electric machinery drive with the pace? Answer: According to the electric current of electric machinery, deserve to use the driver that be more than or is equal to this electric current. If need is low oscillatory or when high accuracy, can deserve to use fractionize driver. To big torsion electric machinery, use tall voltage driver as far as possible, in order to acquire good high speed property. 4.

2 photographs and 5 photographs pace have into electric machinery why to distinguish, how to choose? Answer: Cost of 2 photographs electric machinery is low, but when low speed shake bigger, the moment of force when high speed drops fast. 5 photographs electric machinery is oscillatory and lesser, high speed performance is good, than the speed tall 30~50% of 2 photographs electric machinery, servo electric machinery can be replaced in partial circumstance. 5.

When to choose dc servo, do it and communication servo have why to distinguish? Answer: Cent of dc servo electric machinery is brushed to have and do not have brush electric machinery. Have brush electric machinery cost low, the structure is simple, the torsion that start is big, timing range is wide, control is easy, need to safeguard, but safeguard convenient (change carbon brush) , generate electromagnetism interference, have a demand to the environment. Accordingly it can be used at sensitive to cost common industry and civil circumstance. Accumulate without the airframe that brush report small, weight is light, give muscularity, answer fast, rate is high, inertia is small, rotational and flowing, moment of force is steady. Control is complex, easy implementation intelligence is changed, way of its electron commutation is quick, can square wave commutation or sine wave commutation. Electric machinery maintenance-free, efficiency is very tall, moving temperature is low, electromagnetism radiate is very small, grow life, can use at all sorts of environments. Communicating servo electric machinery also is to not have brush electric machinery, cent is synchronism and asynchronous electric machinery, synchronous electric machinery is used commonly in athletic control at present, its power range is big, can achieve very great power. Big inertia, highest and rotational rate is low, and increase as power and reduce quickly. Suit to make the application that low speed runs smoothly consequently. 6.

Does watchful issue want when use electric machinery? Answer: Following inspections should make before electrify moves: 1) power source voltage is appropriate (control the damage that causes drive module probably too) ; Input to dc + / - polarity scarcely can receive a fault, the electric machinery model on drive controller or voltaic set value are appropriate (do not want in the begining too big) ; 2) control line accepts firm, industrial spot had better want to consider screen issue (if use double skeining thread) ; 3) the line that does not receive need in the begining is received completely on, become the basiccest system repeatedly only, move good hind, join stage by stage again. 4) must make clear method of Hunan ground connection, still use float sky to be not received. 5) the state that wants to observe electric machinery closely inside half hours when begin to move, if whether motion is normal, sound and temperature rise circumstance, discover the problem stops instantly machine adjust. Nextpage 　 7.

The pace is started into electric machinery when moving, move sometimes was not moved or place is moved back and forth, the condition still can be lost sometimes when moving, what problem be? Want to consider the following respect to make an inspection commonly: 1) electric machinery moment of force is enough big, whether drive load, because when we recommend user type selecting commonly, this wants to choose torque ratio to need the electric machinery of big 50%~100% actually, because the pace enters electric machinery cannot overload moves, even if be the instant, can cause lose a condition, serious when stop turn or irregular place is moved repeatedly. 2) on position control implement the inputs pulse of walk with the ball electricity that come is enough big (want commonly > 10mA) , connect in order to make smooth Ou stability guides, the frequency of the input is exorbitant, bring about do not receive, if go up position control implement output circuit is CMOS circuit, also should choose CMOS input driver. 3) the frequency that start whether too tall, whether to install on the program that start accelerate a process, begin to quicken set frequency inside the starting frequency that had better set from electric machinery, even if quicken time very short, do not stabilize possibly otherwise, be in indolent condition even. 4) when electric machinery was not secured good, can appear sometimes this state, it is normal to be belonged to. Because, the intense resonance that caused electric machinery right now actually and bring about enter the state that lose a condition. Electric machinery must have been secured. 5) to 5 photographs electric machinery, phasic receive a fault, electric machinery also cannot work. 8.

I want to dominate servo electric machinery directly through communication means, OK? Possible, more convenient also, it is rate issue only, use at not quite tall to answering speed to ask application. If ask fast response controls parameter, had better control card with servo motion, the logic that there are DSP and high rate above it commonly handles circuit, in order to realize the athletic control of high speed high accuracy. If S is quickened, much axis interpolation. 9.

It is as good as power supply of dc engine system to be entered to the pace with switch power source? General had better not, especially electric machinery of large moment of force, the power that unless choose,compares need is one times greater the switch power source of above. Because, electric machinery is versed in big inductance load is when making, can carry the high pressure that forms the instant to power source. And the overload performance of switch power source is bad, meeting protection closes, and its nice stabilized voltage performance does not need again, cause the damage of switch power source and driver possibly sometimes. Can use convention annular or the direct current source of R transformer transformation. 10.

The volts d.c. that thinks the 10V that use ± or 4~20mA will control a pace to enter electric machinery, OK? Can, but need another changeover module. Nextpage 　 11.

Servo electric machinery takes coder feedback, can you deny the servo driver control that uses a belt to measure fast machine mouth? Can, need matchs a coder to turn measure module of fast machine signal. 12.

Of servo electric machinery pile up dish of part to you can ravel? Prohibit ravelling, because pile up dish of quartz inside piece very easy burst, and after entering dirt, life and precision will not assure, need professional overhaul. 13.

Can is the pace entered and servo electric machinery ravel overhaul or change his costume or dress? Not, had better let manufacturer do, it is very difficult to there is professional equipment after ravelling installation is answered unvarnished, of electric machinery turn the clearance between stator cannot assure. The function of magnet steel material is destroyed, cause even break magnetism, electric machinery moment of force drops greatly. 14.

Can servo controller feel the change of exterior load? If encounter set,stop when obstruction, the thrust follow-up that return or keeps certain. 15.

Can you match homebred driver or electric machinery and abroad's high grade electric machinery or driver to use? In principle is possible, but the ability after wanting to make clear the technical parameter of Hunan electric machinery deserves to use, can reduce due effect greatly otherwise, affect even move for a long time and life. After had better seeking advice to the supplier, decide again. 16.

Use the security of electric machinery of drive of voltage of direct current source that is more than rated voltage value? Normal for this is not a problem, want electric machinery to move inside the speed of place set and voltaic limiting value only. Because electric machinery speed and electric machinery line voltage become direct ratio, because this chooses voltage of some kind of power source,won't have caused fast, but the breakdown such as likelihood happening driver. In addition, the coefficient of the smallest inductance that must make sure electric machinery accords with driver asks, and ensure even the rated electric current that the voltaic limiting value of a set is less than or is equal to electric machinery. In fact, if you can let electric machinery run in the plant that you design if the ground is slower (under rated voltage) , this is very good. With inferior voltage (because this compares low rate) moving meeting makes brush movement rebounds less, and brush / commutator wears away lesser, smaller electric current is used up and compare long electric machinery life. On the other hand, if the requirement of the *** of electric machinery size and function needs additional torsion and rate, excessive drive electric machinery also is possible, but the service life of meeting sacrifice product. Nextpage 　 17.

How to choose proper power supply source for application? Recommend voltage of choice power source to be worth the voltage tall 10%-50% that needs than the biggest. This per cent because Kt, ke, and the voltage drop inside the system and different. The electric current of driver is worth the energy that enough and should deferent application requires. The output voltage value that learns driver and power supply voltage are different, drive output electric current is not as accordingly identical as input electric current also. To decide appropriate supply current, need is calculated this applies all power demand, increase 5% again. By formula of I = P/V computation can get electric current is worth what needing. Recommend voltage of choice power source to be worth the voltage tall 10%-50% that needs than the biggest. This per cent because Kt, ke, and the voltage drop inside the system and different. The electric current of driver is worth the energy that enough and should deferent application requires. The output voltage value that learns driver and power supply voltage are different, drive output electric current is not as accordingly identical as input electric current also. To decide appropriate supply current, need is calculated this applies all power demand, increase 5% again. By formula of I = P/V computation can get electric current is worth what needing. 18.

Can to servo driver I choose the sort of work way? Different pattern is not overall consist in is all the 　 in the driver of model 19.

Driver and system how ground connection? A.

If shed bus line continuously in alternating current source and driver (be like transformer) between if was not being kept apart, the blame that will not shed bus line continuously keeps apart port or the ground of blame segregation signal receives the earth, this may cause equipment breakdown and personnel harm. Because the communal voltage of communication is not of pair of earths, there may be very tall voltage between ground of dc bus line and earth. B.

In most servo, all common ground and earth are carried in signal is received together. The ground return that a variety of join earth means produce suffers noise very easily to affect and on different reference point generation flows. C.

What command referenced voltage to maintain is constant, want to receive the signal land of driver the signal land of controller. It also can receive the land of exterior power source, this works those who affect controller and driver (be like: The 5V power source of coder) . D.

Screen layer ground connection is more difficult, have a few kinds of methods. Place of proper screen ground connection is the referenced potential in its circuit interior on the dot. This the dot depends on noise source and receive whether at the same time ground connection, or float is empty. Should ensure screen layer is in same spot ground contact makes ground electric current won't have shed screen layer. 20.

Why cannot be reducer nodded in standard torsion suitably with electric machinery as it happens? If consider the biggest successive torsion of the course reducer that electric machinery produces, a lot of decelerate compare the torsion order and degree that can exceed reducer far. If we want to design every reducer to match full torsion, the in-house gear of reducer can have too much combination (bulk material is bigger, much) . Such meetings make product price high, and those who disobeyed a product " high-powered, minor volume " principle. Nextpage21.

How choose to use planetary reducer or gear reducer? When planetary reducer is used at taller torsion needing in limited space commonly, namely minor volume big torsion, and its dependability and life are compared gear reducer is close friends. gear reducer is used at inferior electric current to use up, low noise and efficient low cost application. 22.

Why to lead for load (Duty Cycle) ? Laden rate (Duty Cycle) is to show electric machinery is in the working hours inside every job cycle / (working hours + be not working hours) rate. If laden rate is low, allow electric machinery to move with short time of 3 times permanent current, compare thereby rated and successive the power with the greater generation when moving. 23.

Does the standard rotate can be the drive circuit of electric machinery used at linear electric machinery? It is possible commonly. You can regard linear electric machinery as rotate electric machinery, if linear pace enters electric machinery, have brush, without brush and communicate linear electric machinery. Specific seek advice to the supplier please. 24.

Linear electric machinery is perpendicular installation, do fluctuation to move? Can. According to the requirement of the user, we can be added when perpendicular installation install equalizer of mover slide block or add outfit slideway to embrace brake turn off a machine. 25.

Be in same can be many mover installed on platform? Can. Should not hamper each other between a few mover only can. 26.

OK will many install without the mover coil that brushs electric machinery at same a track on the road? Can. Should not hamper each other between a few mover only can. 27.

Use linear electric machinery to than the linear electric machinery of ball silk lever He You is nodded? Because there is mechanical join between stator and mover, eliminated a back so unoccupied place, wear away, block dead problem, motion is more flowing. Highlighted more high accuracy, high rate, tall acceleration, answer fast, motion precision of flowing, control good volume of tall, dependability height of compact, appearance is low, macrobian the characteristic such as life, maintenance-free. 28.

How to choose dynamoelectric crock, slip, accurate platform kind product? Is its cost how calculative? The choice is sent move carry out implement kind product key should see you have what kind of demand to athletic parameter, the application that can need according to you will determine the technical condition such as particular movement parameter, these parameter should accord with your real need, want to contented application asks and take superabundant land already, also do not carry too high, otherwise its cost may multiple at standard type product. E.g. , if 0.

If 1mm precision is used quite, do not choose 0.

The parameter of 01mm. Other is like laden ability, speed to wait also is such. The type selecting proposal that another gives an user is, if not be must, turn pulling force or load, these 3 main parameter do not want precision of speed, fixed position the demand is very high at the same time, because send,move carry out implement the Electromechanical unifinication product that is hi-tech of a high accuracy, we need to enrage function, material to characteristic, material pledges and the many sided such as the processing technique considers and choose controller of corresponding compositive electric machinery, drive and feedback unit from rigid structure, report when the design is made, and lever of the slideway of different accuracy class, silk, prop up with other machine system, the made integral motion parameter that obtains need, it may be said involves the product that launchs the whole body. Of course, you have the product need of high demand, we are OK still and contented, it is cost will be corresponding only rise. CNC Milling