The research of method of correction of position of numerical control orgnaization

Summary: Noumenal position adjusts numerical control component and equipment crucial to working quality of the system. The article elaborated numerical control orgnaization to assemble the basic method with the corrective position in adjusting in the system, the numerical control positioner that introduced gene chip automation to analyse an instrument and umbriferous type are full automatic 2 dimension accuse the laser of eye shot appearance the position of scanning device is corrective and algorithmic. Orgnaization of 1 foreword numerical control regards the fixed position of a kind of automation as component or module, apply extensively at machine equipment and automation instrument domain. Relative to at systematic noumenon character, numerical control orgnaization is an independent component merely, have its machinery origin and coordinate system, and its action is to seeming on systematic noumenon, have oneself distributinging regulation and coordinate system. From theoretic and character, the job that should make sure system of these two coordinate is in the ability when proper place affects to assure a system asks. Assembling actually in adjusting, because component of numerical control position and system are noumenal,make the presence with mounting error, assemble treatment to facilitate, often need to make sure numerical control component and systematic noumenon satisfy certain positional requirement only, and adjust a method to undertake through proper place corrective. The numerical control positioner that the author analyses an instrument in gene chip automation and umbriferous type are full automatic the laser of eye shot appearance of device of 2 dimension scanning in assembling, all used coordinate position method of correction to realize the position with regular system to concern, reduced the technical difficulty that assembles tone full employment. The 2 methodological machinery origin that search origin automatically are numerical control orgnaization of each reference axis absolutely at 0 o'clock, it is the main reference point of position of movement of each reference axis, decide exclusively in the null switch of each axis by installation. It is certain to when moving as a result of mechanical system, be had inertial, have when electromotor is rotational litre of frequency, firm fast, fall frequency 3 phase, when to make sure numerical control orgnaization is in null switch sparks, reference axis suspends campaign instantly, electromotor must move in the rate with low frequency constant some paragraph. When the system is searching origin automatically, in appoint direction every motion after one pace, check null switch to whether spark namely, if switch already worked, decide this position is this reference axis namely at 0 o'clock. Corrective software and Control Panel design position of orgnaization of 3 numerical control to adjust a problem to settle the position of numerical control orgnaization, the author designed basic corrective software and Control Panel, studied the corrective algorithm of orgnaization of a few numerical control, include the following function. The dot moves means to be the position that adjusts reference axis of numerical control orgnaization, control Panel designs the place that has each axis to change way, its most the equivalent of the least movement that bit moves equivalent to be electromotor. Search origin automatically to means searchs origin automatically and show athletic distance or pace number, the design has X-gozero() , y-gozero() function. Corrective algorithm is the core that position of numerical control orgnaization adjusts, different numerical control orgnaization should decide his corrective algorithm. Configuration file records the basic parameter with corrective position of numerical control orgnaization to be worth, by corrective algorithm computational hind is generated automatically, regard the basic configuration that numerical control orgnaization runs normally as the file. Graph 1 graph 2 graphs the positional method of correction of positioner of numerical control of instrument of analysis of automation of 34 gene chip has the example division that forms by the tube of 25 apart 9mm on instrument noumenon, its have an example coordinate that is origin with 1# tube center to fasten XOY. Numerical control positioner drives sampling bougie to move to appoint the test tube position of number, undertake sampling works. Positioner of this numerical control is typical plane orgnaization of 2 coordinate numerical control, use on X axis and Y axis be close to switch to install organic instrument null respectively. Because numerical control positioner is to serve as whole of a component to find a place for,go up in the instrument, considering production economy, the coordinate of the coordinate department that uses fixed position component to assure example area when assemble and numerical control positioner fastens parallel, at this moment the translation that corrective parameter fastens for this two coordinate is worth the position. When the position is corrective, use a dot to move a command to move bougie 1# tube position, this is the origin that example coordinate fastens. Start search origin automatically function and transfer this function, axis of X, Y is answered automatically 0, show each coordinate shift is apart from and keep configuration file actually, the position of positioner of the numerical control that finish is corrective. 5 projectile type are full automatic the graph of positional method of correction of device of 2 dimension scanning shows laser of eye shot appearance 2 times for projectile type full automatic the projectile principle of eye shot appearance, projectile screen is the hemisphere wall of diametical 330mm, suspension of device of 2 dimension scanning is in laser in sky, project beam of light go up in ball wall, generate inspect mark. Optical and projectile system can part to drive C axis, A axis into electromotor by the pace on horizontal and vertical plane whirligig, drop cursor the set position that goes up to screen. Because sum of errors is made adjust the influence of the error in assemble, the exact position of opposite hemisphere screen after making sure optics projects the system is installed very hard and the proper projectile place that inspect mark, should fix the real work place of this system consequently, undertake necessary corrective. If the graph is shown 3 times, assume know spherical on random at 2 o'clock D(x1, y1, z1) and E(x2, y2, z2) , measure so that right now D and H are D1, H1 and D2, H2 respectively, by geometry the relation can get following equation. Sind1=c-z1[(x1-a)2+(y1-b)2+(z1-c)2]½tgh1= | Y1 | + Bx1-asind2=c-z2[(x2-a)2+(y2-b)2+(z2-c)2]½tgh2= | Y2 | + equation group gets A, B, C adjusts a value to be A=x1tgh1-x2tgh2+ above Bx2-a(1) solution | Y1 | - | Y2 | Tgh1-tgh2b=(x1-x2)tgh1tgh2+ | Y1 | Tgh2- | Y2 | Tgh1tgh1-tgh2c=z1+ | Tgd1 | [(X1-a)2+(z1-b)2]½(2) by afore-mentioned analysises knowable, after device of 2 dimension scanning installs laser, do not move beam of light from 0:0 of hemisphere screen foregone at 2 o'clock, decide the motion of two runner shaft coming back is worth, take the place of type (2) , can calculate the real position O(a that gives laser, b, c) , regard cursor position pilot as basic parameter with this. Noumenal position adjusts component of 6 epilogue numerical control and system to work to the system quality is crucial. Low rate is answered 0 it is the premise that makes sure reference axis allows to be located in mechanical origin certainly. Different numerical control orgnaization can choose certain adjustment method of correction will reduce constructional technical difficulty. CNC Milling