DE1906148A1 - Photoelectric device for writing symbols and drawing small figures with high writing or drawing speed for an automatic drawing machine - Google Patents

Description

-7, Feb. 1969

Patent attorney 1 Q Π C 1 / Θ Dr. Helmut Späth I SU O I 49

Mönrten 13, IsoWlosfr. 30/11

O. Coradi AQ , Zurich (Switzerland).

Photo-electric device for writing symbols and drawing small figures sit at high writing or drawing speed for an automatic drawing machine.

The more recently known automatic drawing machines are able to create drawings and inscriptions according to commands, issued by punched tape or other information carriers atf to put up a drawing sheet or other pad. For this purpose, the automatic drawing machine has a working head or work trolley, which can be moved in two coordinate directions is, whereby a tool arranged on this work head or work carriage displays the required symbols, e.g. letters, numbers, and / or applies drawings by writing, drawing, engraving, milling, etc. to the drawing sheet or the base.

Since in such automatic drawing machines for writing or drawing hates to be moved, from the drive motor «to to the tool, are relatively large, and also at least eist Part of the drive motors themselves sit on the masses to be moved, Relatively long approach and braking distances must be expected, so that in particular symbol · with small stroke lengths and kleiae

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Figures only with relatively small average writing or Drawing speeds can be applied to the drawing sheet or the base. When starting and braking the to move-. Deformations of individual parts are also to be expected falsify the required symbols and drawings, in particular if these are a bit complicated and have to be applied quickly to the drawing sheet or the base. An important one A factor impairing performance can also be seen in that such an automatic drawing machine is worn out, especially when starting up and braking, while a continuous one Running does not result in any noticeable wear and tear, so that for this reason, too, the application of small lines and more complicated, possibly also combined symbols on the drawing sheet or the document is impaired.

Now, however, automatic drawing machines are also known, in which the lines and symbols are not written using a writing tool on a drawing sheet or other substrate, but applied photoelectrically to a photographic layer will. But also with these well-known, automatic, photo-electric Drawing machines, in which the working resistance of the tool is eliminated, have to move masses for writing or drawing and the disadvantages mentioned above remain, call maybe also to a somewhat lesser extent.

The invention aims to remedy these disadvantages. The invention relates to a photo-electric device for writing symbols and drawing small figures at high writing or drawing speed for an automatic drawing machine with an adjustable lighting system, in which the opening which determines the line thickness is an exchangeable or adjustable aperture

ORIGINAL INSPECTED

3 1906H8

photographic layer is imaged, which is thereby marked is that the opening of the interchangeable or adjustable wretch through a first bit telecentric imaging system «! Beam path, which has two objectives, in the opening of an intermediate screen, in which is the image-side focal point of the second lens of this first Imaging system * lies, is imaged and the image generated in the opening of the intermediate screen is also imaged by a second imaging system telecentric beam path, which also has two lenses, its focal point on the object side also in the opening of the intermediate diaphragm and its focal point on the image side in the photographic one Layer lies, is further imaged on the photographic layer, and that for deflecting the bundle of rays for the purpose of drawing the lines in one or xn the other coordinate direction between the two lenses, each imaging system * one through an information carrier input signals controlled · mirror galranometer arranged is whose mirror is rotatable about an axis on which the image-side focal point of the first objective and the focal point coinciding with it thing-side focal point of the second lens of the relevant Imaging system is "

The work cart is such a photoelectric device the automatic drawing machine when applying symbols such as letters, numbers and drawings that consist of short lines, on the photographic layer does not move at all and thus it is practically no masses to accelerate or decelerate. The writing or Drawing speed of this practically inertia-free device therefore no limits - the aforementioned disadvantages are better known Drawing machines are therefore no longer necessary. Since this photo-electric device is arranged on the work carriage of the automatic drawing machine, but can also be used with it by moving the work carriage

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long lines are applied to the photographic layer

In the drawing are an example embodiment of the photo-electric Device mm writing symbols wad drawing smaller Figmren »with capitalized spelling, etc. Drawing speed for an automatic Drawing machine according to the invention »a representation of the way of working the same, a unity and a variant of this embodiment, omitting all that are not essential for the invention Parts of the automatic drawing machine shown schematically Seig it

FIG. 1 shows the optical elements of the photo-electrical device arranged on the work carriage of an automatic drawing machine, including writing τοπ symbols and drawing small figures with a large screen. Drawing speed) with the omission of their mountings and bearings »
2 shows the diaphragm image projected onto the intermediate diaphragm without deflection and with a deflection in the x direction,

3 shows a diaphragm image projected onto the photographic layer without deflection, with a deflection in the x-direction and a deflection in the y-direction,
4 shows the drive of the carriers of the two mirror galvanometers of the photoelectric device according to FIG. 1, and

Fig. 5 an embodiment variant of the drive of the carrier of the two SpiegelgalTanometers of the photo-electric device according to Fig.l.

The one on the work carriage (not shown) of an automatic drawing machine arranged photo-electric device for writing symbols, x.B. Letters, digits, mathematical or geometric symbols, and sum drawing small figures with large writing etc. Drawing speed is controlled in a manner known per se by a punched tape or other information carrier, e.g. a magnetic tape

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This device has a light source I ₁ behind which a concave mirror 2 is arranged to increase its brightness. A xenon arc is used as the light source 1 with the door part. In front of the light source 1, a condenser consisting of two optical members 3a and 3 *> is arranged, which images the light source 1 into the opening of an intermediate screen 4. The opening of the intermediate diaphragm 4 illuminated by the light source 1 is mapped by a sliding condenser 5 via a selective mirror 6 into the opening of an exchangeable odeipinteil bare η HLende, in the illustrated case a turret screen 7, which is set by a servomotor 7a. The opening of the turret panel 7 used in each case determines, as will be described below, the line width of the symbols to be written or the figures to be drawn. Since the smallest line width required is relatively small and, for known reasons, needs a lot of light, while the maxi-line line width is considerably larger and accordingly requires less light, the sliding condenser, which can be pushed via a rack and pinion drive 5a, 5b by means of an electric actuator (not shown), can be displaced be moved ο 5 "indicates that the ^u effnung the turret aperture is converged 7 illuminating light bundle or diverges, so that only just the set opening of the turret plate 7, it will roll but illuminated. In order to be able to position the beginnings and ends of the lines and to be able to regulate the strengths of the radiation beam generating the line in accordance with the respective writing or drawing speed and the size of the diameter of the opening of the revolver diaphragm 7 used in each case, between the member 3b of the condenser 3a, 3b and the intermediate screen 4, a shutter 8 which is actuated by an electric servomotor 8a, and between the intermediate screen 4 and the sliding condenser 5, a gray wedge y which can be displaced in a guide Va is arranged. Of it ^ llaotor 7a

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the fievolverblende 7 and the servomotor Ba of the shutter 8 receive their setting signals tob punched tape or from the information carrier. The gray wedge y is guided in its guide 9a via a rack and pinion drive 9b, ¥ &

moved by a servomotor, not shown »The selective Mirror 6 reflects that to illuminate the set Geffnang the Rerolrerblende 7 and danit for the exposure of the photographic Layer used short wave light, while the long wave part dee Light passes through it and falls on a photo cell 10 through whose current the actuator of the gray wedge <* is controlled.

The roll-lit opening of the revolver blade 7 is formed on the photographic layer S aj ^ e by a first imaging system old telecentric beam path and a downstream second imaging system with telecentric beam path. The central beam bundles are drawn from these imaging systems. The first imaging system has a first objective 11, the dmgseitiger focal point lies exactly in the plane of the Eevolverblende 7 and which produces bundles of rays with sandblasting parallel to their axes, but axes converging in its focal point on the image side. These bundles of rays are directed by a first deflecting mirror 13 onto the mirror 14 of a mirror galvanometer, not shown, which is rotatable with an axis 14a perpendicular to the photographic layer S and parallel to the axis 12 of the central ray bundle, smf which is the focal point of the lens 11 on the image side . From the mirror 14 of the mirror galvanometer the bundles of rays, the sandblasting of which are still parallel to their axes, but whose axes are now diverging, are reflected onto a second deflecting mirror 13a and from there onto a deflecting mirror 15, the latter directing them onto a second object of this first imaging system . This second subjectively 16 generates bundles of rays with converging liand rays but parallel to one another »-

9 0 9 8 3 /, / 0 3 I 0

len axes, which are reflected into the opening of an intermediate diaphragm 18 via a deflection mirror 17. Since the focal point of the object 16 on the object side lies on the axis 14a of the mirror 14 of the mirror galvanometer and its focal point on the image side lies in the plane of the intermediate diaphragm 18, an image of the opening of the revolver diaphragm 7 is seen in the opening of the intermediate diaphragm 7, of natural origin. This first imaging system causes the movement of the image of the opening of the revolver diaphragm 7 on the photographic layer towards the direction. The wide, appropriately identically designed imaging system causes the movement of the image of the opening of the bevel panel 7 on the photographic layer 3 in the y-direction. The bundles of rays emanating from the opening of the diaphragm 17, whose ribbon rays direct but whose axes are parallel to one another, are reflected by a deflecting mirror 19 onto a first objective 20, the object-side focal point of which lies in the plane of the diaphragm 18. This objective 20 converts the incoming beam bundles into those whose sandblasts run parallel to their axes, but whose axes converge into the focal point of the objective 20 on the image side. These bundles of rays are reflected via a deflecting mirror 22 and a deflecting mirror 23 onto the mirror 24 of a mirror galvanometer, not shown, which is about an axis 24a perpendicular to the photographic layer S and parallel to the axis of the central bundle of rays , on which the focal point of the lens 20 lies on the image side , is rotatable. The bundles of rays reflected by the mirror 24 are reflected by a deflecting mirror 23a onto a second objective 25, the object-side focal point of which lies on the axis 24a of the mirror 24 and the image-side focal point in the photographic layer S and which thus forms an image of the image on the photographic layer S. in the opening of the

Delete the central aperture, i.e. the set opening of the turret aperture 7

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generated. Hl of the Fig Λ are for the sake of clearer representation Mirrors 23, 23a and 24 are drawn rotated by yO ° about axis 21.

At the beginning of the work, the work cart of the automatic drawing machine by entered from the punched tape or information carrier Signals placed in such a position; that what is assigned to him photo-electric device exactly over the place of the photographic Layer S is located on which a symbol or figure is applied shall be. When drawing lines, of course, the same difficulties must be overcome as with other light pens * · each according to the line width and the size of each line

j g _

ψ reached writing or Character speed, which τ "« ¥ T " + τ

βΓΓ IX. JT

an appropriate level of exposure is required. this will achieved in the following way:

By also rom punched tape or information carrier input control signals, the turret plate 7 to be adjusted according to the required Strichetarke and Terschiebekondensar 5 according to the set opening of the turret aperture. 7 After the light source 1 is switched on, the long-wave portion of the light transmitted through the rom-selective mirror 6 influences the photocell IU in such a way that the servomotor shifts the gray wedge 9 via the rack drive 9b, 9c in its guide 9a through its current, thereby increasing the exposure Both the required writing or drawing speed and the respectively required line thickness is adapted. Writing or drawing is carried out by signals input from the punched tape or information carrier, which act on the mirror galvanometers so that their mirrors 14 or 24 are rotated in this way that they cause the deflections of the image of the set opening of the revolver diaphragm 7 on the photographic layer S which cause the scraping or drawing.

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₉ 1906U8., ·,

The stroke beginning and stroke ends are thereby through the closure », which also entered through you punched tape or information carrier Signals controlled, positioned.

In Fig. 2 is old in a right-angled x-y coordinate system 26 the undeflected image of the opening of the Rerolrerblende 7 and old 26 'this picture in!, Direction deflected. In Fig. 3 Jet 26 again the undeflected image of the opening of the ReTOlrerbleade 7, old 26 · this picture in x-direction and old 26 "this picture in x-wad shown deflected in the y-direction. As the mirrors 14 and 24 of the two äpiegelgalTaaoaeter through the tob punched tape or informaationar slower input signals independently τοηβin each other, one after the other or be rotated in the same direction, can old dea photo-electric Qerat both arbitrarily directed straight lines and arbitrarily marked Lines are applied to the photographic layer S

The deflecting mirrors 13, 13a, 15 '17, 19, 22, 23 and 23a have on dl · illustration of ^u effnung the Rerolwrblende 7 on the photographic layer S no "influence and si · can, depending on the constructive" · From "formation of the phote-elektriechea Qerutes alleaf all also aaders aiigualWl

be net and also omit sam part ·· |

Duals the pk * to-electrical device to be used came, Syab ·! ·

and figures la elaaa η den loordinat ·· des Zedcheatiech ·· der tisekea toinfcsa * isnkiwe sckief sss, reehtwiakligea tee sa sekreikea ta », im Mleaa«, w «rA« a, wi · ta aar Fig. 4 shown «st« llt

^^ ^^ ^ P ^^^^^^^ 9F ^^^^ w ^^^^^^^^^^^ * m ^ a ^^^ v ^^^^ s ^ BjR ^ i ^ HS ^ Hauwp ^ i ^ aa ^^^^^ e ^^^^ '^^^ n ^ t ^ f ^^ r ^^ v ^^ r ^ i ^^^ * ^^ 4 ^^^ B ^ a ^ v sauv vmm ·) ^ · ^ B ^ Fs ^^ flp ^^^ B ^ L ^ a ^ t ^ Bt vit ^^ w wi ^^^ av 24 daraeit ^ Ut * Mm, mi di · Spiegel 13 uad 13a ta * . 23 «al t $ * 3 · a» i— y 14 · tair »| Üi t» lag «rt, welske drekkar auf i · eiaer wm 5 l * ub« ao «lacta · Uta *, ftl Intamiatil AeJe · 14« ta *, ate g «1asj> tt Üa« · Srtm «(« cmr 14 · a «la« k is ei »I * kars4 144 ta * · Md entered.

ZaknrKtor 14d and 244 *% mm old eiaesi Zatarad S? i » öa« rtf f, weOek * ·

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ίο 1906U8

position feedback by a setting motor (not shown) is drivable.

The signals for controlling the servomotor of the gear 27 and daait also the setting of the x-y coordinate system of the photo-electric derates in relation to amf the x-y coordinate system of the drawing table the automatic drawing machine are usually entered through a punched tape or other information carrier. Are the mirror galvanometers Adjusted accordingly by the servomotor Via the gear wheel 27 and is the position of the mirrors 14 or 24 as well as 13 and 13a or 23 and 23a have been checked based on the feedback from the servomotor, the photo-electric device can start working

Should the photo-electric device be used for this purpose, symbols or To write figures in an oblique coordinate system or zm draw, the possibility must be created, the directions of the χ and the / coordinates of the photoelectric device in relation to

arbitrarily change those of the drawing table of the automatic drawing machine M to ktinmem. 2λ this purpose is expedient, as shown in FIG. 5, which causes the deflections of the image of the oscillation of the faceplate 7 on the photographic layer 3 in x-direction is drawn, mounted on the bucket carrier 14b ¹ , which is rotatably mounted amjjji an axis coaxial to the beam axis 12 ·· 14 «·. A gearwheel 14d ”is arranged on this“ carrier 14b ¹ ”, which stands with an * Ismnrad 27a i» wraparound, which can be driven by a servomotor (not shown) with feedback. In the same way, dmWi da «di · deflection of the Alm ·· der O.ffnmmg mur BvfolvHrmUmd · 7 amf tier pmttogrmpmiscta» tt Somioht S la jrHU «mtm * g causing · Spd« f «lcalranosm) t« r, vom w * leh «si im« for Hg »5 • btmfsll · nmr dor 9pi« g «l 24 is drawn, as« imam Trtg »r 24b ¹ gel«.

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device, which is rotatably mounted on an ^{axis 24b 1} coaxial with the beam blind axis 21. A gear wheel 24d 'is arranged on this carrier 24b ¹ , which is in engagement with a gear wheel 27b, which can be driven by a servomotor (not shown) with feedback *

Here, too, the signals for the servo motors and dasit but Setting the x- and y-coordinate directions of the photo-electric Device in addition to the x-y coordinate system of the drawing table of the autosatic drawing machine usually through a punched tape or entered another information carrier. Are the two SpiegelgalTanoseters by the servo motors via the gears 27a and 27b of the oblique coordinate system of the photo-electrical device « set accordingly and if the settings of the mirrors 14 and 24 are checked using the feedback from the servo motors, the photo-electric Device begin its work.

It is of course also possible to make the arrangement so that in the embodiment according to FIG. 5, the servo motors via the gearwheels 27a and 27b the x- and y-coordinate directions of the photo-elelctrischea Do not set the device independently of each other, but rather that the ice Servomotor see B. the position of the x-coordinate direction of the photo-electric Device in relation to its y-coordinate direction and the other Servomotor the Stellusg of the oblique coordinate system of the photo-electric device in reference to the rectangular coordinate system of the drawing table of the automatic drawing machine.

Since the signals that cause the photo-electric device, the To write the required symbols or to draw the required figures su, can be taken from a memory, which usually has a limited capacity has, various precautions can be taken to achieve the largest possible number with relatively few memory positions to be able to write or draw symbols and figures *.

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So see, for example, the translations "between the entered scales for the deflection of the image" of the opening of the shutter 7 In χ-direction and in y-direction can each be individually adjustable · This enables es, alt de »photo-electric device, a symbol or a figure For a given width, write * u differently or in «eichnea and vice versa.

It is also possible to use symbols or figures according to LochstrstL-fenbefehl display at an angle, e.g. in the x-direction in the writing direction and inclined in the y-direction.

Sym ^ tLsche symbols and figures know it _s the same memory positions are obtained by _n changes according to the Torseichen the control signals for the Spiegelgalranoaeter to Lech strip command.

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Claims (1)

13th
ent »n.prttoh. : 1906-8 Hioto-electric device for writing symbols and drawing small figures with high writing or drawing speed for an automatic drawing machine with an «adjustable lighting system, in which the opening of an interchangeable or adjustable aperture that determines the line thickness is mapped onto a photographic layer that the opening of the exchangeable or adjustable diaphragm (7) through a first imaging system rait telecentric "" beam path, which has two objectives (11 and 16), into the opening of an intermediate diaphragm (18), in which the image-side focal point of the second objective ( 16) of said first imaging system is to be imaged and in the ^u effnung the intermediate screen il8) image generated by a second imaging system having oelezentrischem beam path, which likewise has two lenses (20 and 25), the object-side focal point also in the ^above effnung the ^ wiper screen (18) and whose focal point on the image side lies in the photographic layer (S), is further imaged onto the photographic layer (s), and that only the deflection of the beam for the purpose of drawing the lines in one or the other coordinate direction between the two objectives (11 mnd 16 or 20 and d 25) each imaging system is arranged a mirror galvanometer controlled by signals input from an information carrier, the mirror ν14 or 24) of which is rotatable about an axis (14a or 24m) on which the image-side focal point of the first Objective (U or 20) and the focal point on the object side of the second objective (16 or 2 · photo * lektrisoaee device according to spoke 1, characterized in that that each of the two mirror galvanometers is attached to a carrier (14b or 24b) 909834/0310 .. ζ 14 1906U8 is arranged. which is rotatable on an axis (14c or 24c) that is coaxial with the optical axis (12 or 21) of the imaging system in question. and that a gear (14d or 3 $$) is arranged on the carrier (.14b wad 24b), bit which gearwheels (14d and 24d) are controlled by a servomotor which is controlled by signals input from an information carrier , drivable gear ^ 27) is in engagement »3» Photoelectric device according to claim I _5, characterized in that each of the two mirror galranometers is arranged on a carrier (14b ¹ or 24b ¹ ) which is on an axis to the optical axis (. 12 or »21) of the imaging system relating to the W ^{coaxial axis (14c 1} or» 24e ') is rotatable, and that on each carrier (.14b ¹ or 24b ¹ ) a gear (14d' to, 24d ^ä ) / independently of one another / is arranged with which gears ^ 14d 'or · 24d') / a gear (27a or -uiforaatfens- "carrier input signals is controlled. 4. photo-elejjtrisches device according to claims 1 and 2 or 3 a thereby characterized in that each mirror galranometer has a device for changing which can be controlled by signals from the information carrier independently of one another the scale of the signals entered by the information carrier for the mirror galvanoietor is connected upstream. 5 · Photo-electrical device according to one of claims 1 to 4, characterized characterized in that each mirror galvanometer has one of these signals of the information carrier controllable9 device for changing the gate sign the output signals is upstream « 909834/0310 Blank page