JPS63123650A - Lost motion correction method for nc feeding - Google Patents
Lost motion correction method for nc feedingInfo
- Publication number
- JPS63123650A JPS63123650A JP26668186A JP26668186A JPS63123650A JP S63123650 A JPS63123650 A JP S63123650A JP 26668186 A JP26668186 A JP 26668186A JP 26668186 A JP26668186 A JP 26668186A JP S63123650 A JPS63123650 A JP S63123650A
- Authority
- JP
- Japan
- Prior art keywords
- lost motion
- amount
- reverse direction
- positioning
- location
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 7
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Landscapes
- Automatic Control Of Machine Tools (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明はＮＯ送りのロストモーション補正方法に関し、
ＣＮＣ成形・平面研削盤、ＣＮＣ円筒研削盤、ＮＣ制御
による旋盤、マシニングセンタ等あらゆる工作機械に適
用できる。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a lost motion correction method for NO feed,
It can be applied to all machine tools such as CNC forming/surface grinding machines, CNC cylindrical grinders, NC-controlled lathes, and machining centers.
〈従来の技術〉
ＮＯ送りにおいて送りの方向を逆にした場合には、必ず
ロストモーションが存在する事が良く知られている。こ
の量は送りの位置決めを行う場合の誤差となる。そこで
従来では、あらかじめこの日ストモーション量を計測し
ておき、この發をＮＣ制御装置内に記憶して、送り方向
を逆にする場合には補正を行なっていたが、補正量は複
数でなく単一口であった。<Prior Art> It is well known that lost motion always exists when the direction of feed is reversed in NO feed. This amount becomes an error when positioning the feed. Therefore, in the past, the amount of strike motion was measured in advance on that day, this result was stored in the NC control device, and correction was made when reversing the feed direction, but the amount of correction was not multiple. It was a single mouth.
〈発明が解決しようとする問題点〉
ＮＣ送りの位置決め精度は、この日ストモーションによ
って悪化するので、補正によって精度を高めており、位
置決め精度に対する要求値が厳しくない場合には単一の
補正量でも問題がなかった。<Problem to be solved by the invention> Since the positioning accuracy of NC feed deteriorates due to the current strike motion, the accuracy is improved by correction, and if the required value for positioning accuracy is not strict, a single correction amount is used. But there were no problems.
しかし、±１μｍ程度の高精度位置決めを必要とする場
合、実際のロストモーション量は一定でなく逆方向に動
かす量により異なる現象がある。したがって逆方向の位
置決め量においては、一定の補正量では高精度の位置決
めが出来ないという問題があった。However, when high-precision positioning of about ±1 μm is required, the actual amount of lost motion is not constant and varies depending on the amount of movement in the opposite direction. Therefore, in the positioning amount in the opposite direction, there is a problem in that highly accurate positioning cannot be performed with a fixed correction amount.
〈問題を解決するための手段〉
逆方向への位置決め量に対応した責なるロストモーショ
ン量をあらかじめ測定し、位置決め層に対応したロスト
モーション量をＮＣ制御装置内に記憶し、ＮＣ制御装置
により、指令された逆方向位置決め量に対応してロスト
モーション量を決定し、この決定したロストモーション
量でもって補正を行う方法をとる事により高精度位置決
めを実現する。<Means for solving the problem> The amount of lost motion corresponding to the amount of positioning in the opposite direction is measured in advance, the amount of lost motion corresponding to the positioning layer is stored in the NC control device, and the amount of lost motion corresponding to the positioning layer is stored in the NC control device. High-precision positioning is achieved by determining the amount of lost motion in response to the commanded amount of backward positioning and performing correction using the determined amount of lost motion.
〈実施例〉
第１図に実施のフローを示す。ここでステップ５が、従
来と異なる部分である。ステップ５には、あらかじめ測
定された逆方向への位置決めｌ（Ｘとする）に対応する
ロストモーション＠（Ｙとする）の関係が、Ｘ−Ｙの数
値のファイルとしてＮＣ制御装置内に構成される。<Example> Figure 1 shows the flow of implementation. Here, step 5 is different from the conventional method. In step 5, the relationship of lost motion @ (denoted as Y) corresponding to the previously measured positioning l in the opposite direction (denoted as X) is configured in the NC control device as a file of X-Y values. Ru.
次に全体の制御方法を説明する。位置決め指令が出ると
（ステップ１）これが逆方向指令であるか否かを判別す
る（ステップ２）。正方向指令であるときにはステップ
７にジャンプして正方向の位置決めを実行する。逆方向
指令であるときには位置決め量を確認しくステップ３）
、逆の方向への位置決め最に対応したロストモーション
量をファイル（ステップ５）から読み出す（ステップ４
）。Next, the overall control method will be explained. When a positioning command is issued (step 1), it is determined whether or not this is a reverse direction command (step 2). If it is a forward direction command, the process jumps to step 7 and positioning in the forward direction is executed. If it is a reverse direction command, check the positioning amount (Step 3)
, the amount of lost motion corresponding to the positioning in the opposite direction is read from the file (step 5) (step 4).
).
読み出しだロストモーション量により位Ｍ決め指令値を
補正しくステップ６）、補正した位置決め指令値により
逆方向の位置決めを実行する（ステップ７）。The positioning command value is corrected using the read lost motion amount (step 6), and positioning in the opposite direction is executed using the corrected positioning command value (step 7).
〈発明の効果〉
従来のロストモーション補正量は単一であったので、実
際には逆方向位置決め社により異なるロストモーション
量を正確に補正する事が出来ず、高精度位置決めを行う
場合には不充分であったのを、本発明では逆方向位置決
め量に応じた正しいロストモーション量を補正可能とし
た事により、高精度位置決めが可能となった。<Effects of the Invention> Since the conventional lost motion correction amount was single, it was actually impossible to accurately correct the lost motion amount, which differs depending on the positioning company in the reverse direction, and this is inconvenient when performing high-precision positioning. However, in the present invention, it is possible to correct the correct amount of lost motion according to the amount of positioning in the reverse direction, thereby making it possible to perform high-precision positioning.
第１図は本発明方法を説明するためのフロー図である。 FIG. 1 is a flow diagram for explaining the method of the present invention.
Claims (1)
れるＮＣ送り機構において、サーボモータを正転から逆
転させる時に送りサーボモータとボールネジのカップリ
ングやボールネジ等の剛性により生ずるロストモーショ
ンを補正する方法であつて、逆方向への位置決め量とロ
ストモーション量との関係を示す関数をＮＣ制御装置内
にあらかじめ記憶し、逆転の指令が出された時には指令
された逆方向への位置決め量に応じたロストモーション
量を前記関数を用いて求め、求めたロストモーション量
を補正量として補正を行うことを特徴とするＮＣ送りロ
ストモーション補正方法。In an NC feed mechanism composed of a ball screw, a feed servo motor, and an NC control device, this method corrects lost motion caused by the coupling between the feed servo motor and the ball screw, the rigidity of the ball screw, etc. when the servo motor is rotated from normal rotation to reverse rotation. A function indicating the relationship between the positioning amount in the reverse direction and the amount of lost motion is stored in advance in the NC control device, and when a reverse command is issued, the lost motion is generated according to the commanded positioning amount in the reverse direction. An NC feed lost motion correction method, characterized in that the amount of lost motion is determined using the above function, and correction is performed using the determined amount of lost motion as a correction amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26668186A JPS63123650A (en) | 1986-11-11 | 1986-11-11 | Lost motion correction method for nc feeding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26668186A JPS63123650A (en) | 1986-11-11 | 1986-11-11 | Lost motion correction method for nc feeding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63123650A true JPS63123650A (en) | 1988-05-27 |
Family
ID=17434215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26668186A Pending JPS63123650A (en) | 1986-11-11 | 1986-11-11 | Lost motion correction method for nc feeding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63123650A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992021479A1 (en) * | 1991-06-06 | 1992-12-10 | Toshiba Kikai Kabushiki Kaisha | Method of indexing attachment and system therefor |
| JP2015179398A (en) * | 2014-03-19 | 2015-10-08 | Dmg森精機株式会社 | Controller |
-
1986
- 1986-11-11 JP JP26668186A patent/JPS63123650A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992021479A1 (en) * | 1991-06-06 | 1992-12-10 | Toshiba Kikai Kabushiki Kaisha | Method of indexing attachment and system therefor |
| JP2015179398A (en) * | 2014-03-19 | 2015-10-08 | Dmg森精機株式会社 | Controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4709509A (en) | Numerically controlled grinding machine | |
| US4773187A (en) | Numerically controlled grinding machine | |
| US4334178A (en) | Method and apparatus for correcting tool lengths and tool radii, particularly for numerically controlled machines equipped with position or path measuring systems by means of nominal-actual value comparison | |
| US4743823A (en) | Method and device for correcting backlash | |
| JPH027793B2 (en) | ||
| CN108723414A (en) | Ensure the processing technology of numerically-controlled machine tool precision box parts main aperture system position of related features | |
| JPH0472666B2 (en) | ||
| US3852719A (en) | Pitch error compensation system | |
| JPH0364254B2 (en) | ||
| JPH04348869A (en) | Correction device for angular grinding wheel | |
| JPS63123650A (en) | Lost motion correction method for nc feeding | |
| JPS5981705A (en) | Compensating method of nc machine tool | |
| JPH03290705A (en) | Numerical controller | |
| EP0072870A1 (en) | Backlash compensation system for dual position-feedback control systems | |
| JPH0367823B2 (en) | ||
| EP0200788A1 (en) | Method of returning rotary shaft to reference point | |
| JPS6157150B2 (en) | ||
| JP2574228Y2 (en) | Lathe in-machine measuring device | |
| JPS6125929Y2 (en) | ||
| JPS6154528B2 (en) | ||
| JPH02643Y2 (en) | ||
| JPS6157151B2 (en) | ||
| JPS62206606A (en) | Correction method for abrasion loss of tool | |
| JPH0981222A (en) | Method for switching coordinate data specification format for numerically controlled machine tool | |
| JPH0288147A (en) | Nc turning machine tool with auxiliary measuring device and coordinate axis arithmetic device thereof |