打印机介绍.ppt

1、AIO Brief Introduction 4408 to be used as an example,What is AIO? AIO is All In One, also called “MFP”, which means Multi-Function Printer. Many functions like printing, scanning, faxing, and ADF and so on, can be achieved in one machine. It includes, generally, three major modules just like printer

2、 module, scanner module, and ADF module.,ADF module,Scanner Module,Printer Module,1,Lets begin at printer module. The design 45 Shore A Cap Alignment: +/- 0.4 mm centered Wiper Cleans the surface of the pens Edge: sharp to R0.05 MAX; durable to 100,000 cycles Material: TPU “Texin” 285; 70 Shore A,Ca

3、pping Force: 280g +/- 10%,H,Deflection Force (F),H = 0.76 mm +/- 0.5 F = 100 150 g,Spit & Wasted Ink Accumulation,Spit Jets the nozzles to clear them Wasted Ink Dye Based Ink: 72% water, 5% non-volatile Pigment Ink: 72% water, 15% no-volatile Average Spits per page: 500 for color & 500 for mono Wast

4、e Form Semi solid for Mono Liquid for Color,Debris,Liquid Wasted Ink,Carrier frame and layout,Some test on printer engine,1,First Writing Line Spec.,Top Margin from top left corner to the topmost, leftmost printable position X = 0.2 0.3 inches Y = 0.005 0.05 inches Top of Form Skew Skew 0.004 inches

5、 / inch Skew = (Y1 - Y2) / W Related Design Issues Parallelism of two shaft Pinch steps (firmware),X,Y,Y1,Y2,W,Printable Area,First Line,2, Vertical Registration Spec. (I),Line to Line Distance Different distance for different mode Standard Deviation s 0.0009” for 1 pass black s 0.0007” for 2 pass b

6、lack s 0.0006” for 1 pass color s 0.0004” for 2 pass color s 0.0003” for 4 pass color Accumulated Error Little underfeed is good -0.001” X -0.002”,Line-to-line Distance: 208/600” for 0% shingling Mono 104/600” for 50% shingling Mono 64/600” for 0% shingling CMY 32/600” for 50% shingling CMY 16/600”

7、for 25% shingling CMY,3, Vertical Registration Spec. (II),Horizontal Banding Related Design Issues Gear Plate RC3 running fits for gear Center distance Perpendicularity of stud Gear Draft in gear holes (minimal) Gear quality (Q9+) Feedroll Feedroll gear perpendicularity Diameter tolerance Total indi

8、cator runout,No underfeed (good but ideal case),Halo / Overfeed (no good),Obvious banding / much underfeed (no good),Little underfeed (good),Horizontal banding,4, Skew During Print Spec.,Skew During Print Skew 0.005 inches / inch Skew = (Y1 - Y2) / W Related Design Issues Feedroll tire variation Pre

9、ssure roll spring force variation,Y1,Y2,W,Printable Area,First Line,Last Line,5, Horizontal Registration Spec.,Adjacent Pixel Spacing s 0.0004 inches Vertical banding problem Page Wide Magnification 7.970” X 8.000” Related Design Issues Encoder strip precision DC motor control algorithm of carrier d

10、riving system,X,Printable Area,Leftmost Line,Rightmost Line,6, Carrier to Media Feed Alignment Spec.,Stitching Horizontal misalignment of dots at bottom of one swath to the dots at top of the next swath q 0.075 degrees, where q = tan -1(d / L) Related Design Issues Angular displacement of cartridge

11、to media indexing Non-uniform cartridge-to-media gap,L =1/3“,A swath,q,d,L (swath length),Stitching Symptom (I) - PF Skew,Non-parallelism between Carrier Shaft and Media Indexing Axis (Feedroll Shaft Theoretically) Skew During Print,Stitching Symptom (II) - CGR Skew,Non-parallelism between Cartridge

12、 Datum and Carrier Shaft (if no angular nozzle plate without any angular displacement) Print Head to Media Gap Effect,7, Smear test. 8, missing block. 9, Tracking test for star wheel unit. 10, paper feed test(multi-feed, overfeed or underfeed) Offline test: 1, capping force. 2, cap alignment. 3, Wip

13、er interference. 4, Stich 5, Banding. 6, Paper feed(accuracy),Media Feed Failure Definition,Media Jam Error requiring operator intervention to correct Exit tray capacity exceeded Print Defects Serious TOF skew Permanent damage to media Dog ears, treeing, wrinkling, nicks or embossing Multiple media

14、feed more than once Smudge, smear or any defect by mechanism contact,2, Scanner module,ID cover for Printer engine,Scanner module,Scanner base,Carriage(CCD),Scanner shaft(locating, roughness, parallelism),Scanner Motor and Gear train (Gear ratio is 15.75),Spring(tension),CCD & CIS Scanner,Physics Ch

15、aracter Performance,CCD,CCD Charge Coupled Device The device is composed of micro capacitance. Transform light intensity to voltage,CCD Scanner,Document,CIS(Contact Image Sensor),Light Source(LED Array,LED ,CCFL) Rod Lens Sensor array Interface Control Housing,CIS Scanner,Rod Lens,Light Source,Senso

16、r,Document,Glass,CCD Scanner Performance,High Quality The scanner use lenses and mirror to image the object . Depth of field This type of scanner is quite good ,meaning textured or wrinkled objects remain in focus Improving Speed and S/N Optical Raster focus light from a large area down to the small

17、 sensor ,improving speed and signal-to-noise ratio,CCD Scanner Defect,Size Optical reduction requires a long focus path. It must be “folded” optical path to reduce the size. The scanner size limit optical path design Cost The added optical system,mirror and other structure to hold them. Optical Stru

18、cture Optical system are more easily damaged,CIS Scanner Performance,Size The CIS Scanner can be contained in a very small bar. The scanner height can be very thin Flexibility The size of the imaging system make its application Cost It cost is low.,CIS Scanner Defect,The lenses are very inefficient.

19、 The most of the light is lost.So, the scanner speed is slowly Poor depth of filed The sensor must be very close to the document or object. The depth of filed is fixed. The sensor alignment CIS Sensor are butting them up and end to end. When it joins ,the technology is very importance. It will effec

20、t the image quality Color Accuracy CIS light source is LED which intensity is not enough The color quality is not well .,CIS Scanner Defect,Light Source characteristic LED Source Limit Sensor Uniformity,RED Light 610 630 nm GREEN Light 550 570 nm BLUE Light 470 490 nm,CCD & CIS Compare,P.S.: CCFL me

21、ans cold cathode fluorescent lamp,(1). Test Item Review,Check the displacement of image. Check the image definition. Check the misalignment of each channel. Check the stability of transmission system. Check the image noise. Check the contrast and diffuse lighting. Check the skew of x,y direction and

22、 perpendicularity. Check the scale of x,y direction. Check the stability of lamp. Check the accuracy to present different gray level. Check color balance Check the gray level uniformity at different gray level,(2). Test Chart,Chart 24#,The test program will scan chart 3 times. 1st will scan top area

23、 use 600DPI for T2 reference,T3 MTF,T4 colorReg. 2nd will scan bottom area use 600DPI for T6 S/S,T7 Noise,T8 Flare 3rd will scan whole area use 150DPI for T10 Orth,T11 scaling,T12 response T13 gray reprod,T14 color reprod,T15 density uniformity.,1st Scanning area and file name is 600T.bmp,2st Scanni

24、ng area and file name is 600S.bmp,3rd file name is 150F.bmp,T2: Reference test,Mechanical related item(T2,T10,T11),600T.bmp,X,Y,Measure the distance from The center of the reference mark to the two edges of the image.And unit is mm.,Spec,Result,T2: Reference failure cause,1. MFP Mechanical dimension

25、 error,2. FW/SW Algorithm Error,3. Carriage CAT x_position,z_positon error(X direction),4. Humanship:misplace test chart,5. Test chart mechanical dimension error.,T10: Orthogonality test,Mechanical related item(T2,T10,T11),150F.bmp,O,X unit mm,Y,Left-top(x1,y1),Right-top(x2,y2),Left-bottom(x3,y3),Ri

26、ght-bottom(x4,y4),Skew_x=arctg (y2-y1)/(x2-x1) Skew_y=arctg (x3-x1-22)/(y3-y1) Orthogonality=Skew_x Skew_y,Spec,Result,T10: Orthogonality failure cause,1. Mechanical dimension error(MFP,Carriage bearing),2. Carriage CAT z_angle (Skew-x),3. Humanship:misplace test chart,4. Test chart mechanical dimen

27、sion error.,T11: scaling test,150F.bmp,Scaling= (L-Lstd)/Lstd,Top side,Bottom side,Left side,Right side,T11: Scaling failure cause,1. Y direction: Transmission system,2. X-direction: Optical system,T3: MTF Test Block location,T3: MTF Test,Base Block,X1,X2,X3,X4,X5,Y5,Y4,Y3,Y2,Y1,600T.bmp,T3: MTF Tes

28、t,Block X1,Block Y1,Pixel number,Gray level,MTF =,Test max Test min,REFmax - REFmin,T3: MTF Test,T3: MTF Test Failure Cause:,A . H-MTF (Block Y1Y5) failure: 1. Carriage CAT error,or Lens ,CCD sensor error. 2.CCD Timing error. B . V-MTF (Block X1X5) failure: 1. Stability of optical system. (mirror an

29、gle change ,vibrate ) 2. Stability of transmission system. 3.CCD Timing error.,T6: Start /Stop Test,Slant Angle=5.71 tan(5.71 )=1/10,Measure the center of each line. And get Max,Min and Standard deviation.,Cause:,1. Transmission System,2. Image processing might have influence,Calibration sheet(Home pattern and calibrationWhite/Black. The function is, find home and calibrating scanning) Buttons design and OP panel Hinge design(with creativity) Cable routing arrangement Connection for Coverset,3, ADF module,Top cover,Scanner Lid,Doc Tray,ADF module,ACM use