JPS6333949U - - Google Patents
Info
- Publication number
- JPS6333949U JPS6333949U JP12713386U JP12713386U JPS6333949U JP S6333949 U JPS6333949 U JP S6333949U JP 12713386 U JP12713386 U JP 12713386U JP 12713386 U JP12713386 U JP 12713386U JP S6333949 U JPS6333949 U JP S6333949U
- Authority
- JP
- Japan
- Prior art keywords
- charging
- ink
- output
- charging signal
- detecting
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 230000005284 excitation Effects 0.000 claims description 2
- 238000000889 atomisation Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
Description
第１図は本考案の実施例ブロツク図、第２図は
本考案の詳細回路図、第３図は正常時の帯電メカ
ニズムを示す図、第４図は異常時の帯電メカニズ
ムを示す図、第５図は全体動作タイムチヤートで
ある。
１……帯電アンプ、２……放電センサ、３……
放電検知回路、４……充電センサ、５……充電検
知回路、６……充電積分回路、７……充電積分コ
ンデンサ、８……積分リセツト回路、９……比較
回路、１０……ラツチ回路、１１……帯電電源回
路、１２……マイコン回路、１３……帯電信号作
成回路、１４……ノズル、１５……帯電々極、１
６……偏向電極Ｐ、１７……偏向電極Ｎ、１８…
…ガター、１９……被印字物、２０……制御抵抗
、２１……励振アンプ、２ａ……発光ダイオード
（４ａも同じ）、２ｂ……受光トランジスタ（４
ｂも同じ）、２２……外部装置、２３……バツフ
アＡ、２４……バツフアＢ、２５……インク柱、
２６……インク粒子、２７……インク、２８……
フレームグランド、８ａ，８ｃ……トランジスタ
、８ｂ……ＦＥＴ、２９……リセツトＳＷ。
FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a detailed circuit diagram of the present invention, FIG. 3 is a diagram showing the charging mechanism under normal conditions, FIG. 4 is a diagram showing the charging mechanism under abnormal conditions, and FIG. Figure 5 is an overall operation time chart. 1... Charge amplifier, 2... Discharge sensor, 3...
Discharge detection circuit, 4... Charge sensor, 5... Charge detection circuit, 6... Charge integration circuit, 7... Charge integration capacitor, 8... Integral reset circuit, 9... Comparison circuit, 10... Latch circuit, 11...Charging power supply circuit, 12...Microcomputer circuit, 13...Charging signal creation circuit, 14...Nozzle, 15...Charging electrode, 1
6... Deflection electrode P, 17... Deflection electrode N, 18...
... Gutter, 19 ... Printed object, 20 ... Control resistor, 21 ... Excitation amplifier, 2a ... Light emitting diode (same as 4a), 2b ... Light receiving transistor (4
b), 22... external device, 23... buffer A, 24... buffer B, 25... ink column,
26... Ink particles, 27... Ink, 28...
Frame ground, 8a, 8c...Transistor, 8b...FET, 29...Reset SW.
Claims (1)
ノズルを一定周波数の励振電圧で励振し、該ノズ
ルから噴出するインクを前記周波数に同期して規
則的に粒子化し、該インクの粒子化する近傍に帯
電々極を配置して、インク粒子の発生するタイミ
ングにあわせて帯電々極に帯電信号を付与して、
前記インク粒子に帯電信号に比例した電荷を与え
、該荷電粒子を偏向制御するインクジエツトプリ
ンタにおいて、帯電々極へ帯電信号を付与したと
き流れる充電々流を検出する手段と、付与を中止
したとき流れる放電々流を検出する手段を有し、
前記充電々流検出手段の出力を充電積分手段へ接
続し、該充電々流を常に積分せしめると同時に、
前記放電検出手段の出力で、前記充電積分手段の
積分値を常に初期化する手段を有するとともに、
該充電積分手段の出力を比較手段への入力として
扱い、この充電積分手段の出力がある一定の値を
越えたなら、該比較手段が作動し、前記帯電信号
を発生する手段を無効とする手段を有するととも
に、装置の外部へ警報信号を出力する手段を有し
てなることを特徴とするインクジエツトプリンタ
の帯電信号短絡検出装置。 Ink pressurized at a constant pressure is supplied to a nozzle, the nozzle is excited with an excitation voltage of a constant frequency, the ink ejected from the nozzle is regularly atomized in synchronization with the frequency, and the vicinity of the ink atomization is A charging electrode is placed in the ink droplet, and a charging signal is applied to the charging electrode in accordance with the timing at which ink particles are generated.
In an inkjet printer that applies a charge proportional to a charging signal to the ink particles and controls the deflection of the charged particles, means for detecting a current of charge flowing when a charging signal is applied to the charged electrodes, and when the application is stopped. having means for detecting the flowing discharge current;
Connecting the output of the charging current detecting means to charging integrating means to constantly integrate the charging current, and at the same time,
and means for always initializing the integral value of the charge integrating means with the output of the discharge detecting means,
Means for treating the output of the charging integrating means as an input to the comparing means, and when the output of the charging integrating means exceeds a certain value, the comparing means is activated and the means for generating the charging signal is disabled. 1. A charging signal short-circuit detection device for an inkjet printer, characterized in that it has a charging signal short circuit detection device for an inkjet printer, and further includes means for outputting an alarm signal to the outside of the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12713386U JPS6333949U (en) | 1986-08-22 | 1986-08-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12713386U JPS6333949U (en) | 1986-08-22 | 1986-08-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6333949U true JPS6333949U (en) | 1988-03-04 |
Family
ID=31021592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12713386U Pending JPS6333949U (en) | 1986-08-22 | 1986-08-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6333949U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0690516A (en) * | 1992-09-07 | 1994-03-29 | Mitsubishi Electric Corp | Circuit-breaker |
-
1986
- 1986-08-22 JP JP12713386U patent/JPS6333949U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0690516A (en) * | 1992-09-07 | 1994-03-29 | Mitsubishi Electric Corp | Circuit-breaker |
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