TA的每日心情 | 开心 2019-11-19 15:19 |
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DEK印刷机手册SqueegeeModule
3 e0 {9 y- Q1 Z5 L+ e+ RMODULE OVERVIEW
' o, K7 n# ^ H+ y! zPurpose 8 j; j) E7 P2 }
The squeegee module allows the setting and monitoring of squeegee height and pressure during the print stroke.
; V. L7 G' w" A) x: SThe positioning of the squeegee module across the print stroke (from front to back).
+ L( m! ~# b7 jElements
6 K/ {4 Q" I, q8 i. G7 F" tThe major components of the squeegee module are as follows:5 D( Z, `( }4 ~! [
? Squeegee Housing s' g, g U/ n9 |' [! G; h* n
? Squeegees
! \$ }5 l4 R& r" [! j? Squeegee Pressure Amplifier0 W* D4 v+ S$ ^; B. m
? Squeegee Drive Stepper Motors
$ c/ }. _1 v* C Y( w4 E# }0 o; A? Pre-load Set Screw- o* r3 t, G' R4 W0 F" T. D3 E
? Load Cell
* J5 H) T0 M3 [? Main Compression Spring' S* A6 g; w+ D4 x7 c7 z! l
? Squeegee Drive Mechanism9 g: u4 ], e6 q8 Y
? Front And Rear Squeegee Mounts
4 Z1 q G5 z5 M, j# l? Home Sensor Hall Effect Switches (2 positions)+ E# x# f) l8 N/ _$ ~
Operation The squeegee drive motors move the front and rear squeegee mounts to the required positions.4 j8 _6 F6 Y( E" I" \ \ Q! }" E6 z$ b9 {& o
The printhead pressure system is the mechanism which drives the two squeegees independently down onto the screen and applies the pressure necessary to print.
( q4 e8 E9 t5 x0 o3 KThe pressure being applied during print is monitored by the pressure amplifier,and if necessary, corrections to pressure is made as part of a closed loop process. The load cell and pressure amplifier give a change in output voltage proportional to the pressure applied by the squeegees.
2 f, W& V: y- S# |* K6 t4 Z/ k5 DThe pre-load set screw and main compression spring are used to calibrate the load cell/squeegee pressure.
0 G2 C) H6 S6 a1 ?: h8 B- LThe home sensors, sited in the printhead mechanism, detect when the front and rear squeegee mounts are at the top of their travel.- h3 f8 h% O- n$ O* U
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