Thank you John for sharing this info!
"My 430 plotter would intermittently only plot a few inches of the drawing. The carriage would keep moving, but no ink was being deployed. This would go on for a few plots and then it would plot the full sheet. It would also give me cartridge errors intermittently too. This went off & on for over 2 years. I purchased an electronic module and replaced it with no change. I cleaned the cartridge contacts and changed the cable to the computer. This too resulted in no change. Finally I replace the trailing cable and instantly my machine is plotting fully again. The thought was that the trailing cable, which constantly flexes when plotting, has a wire or wires that broke but were still making contact some of the time. Thereby giving me the intermittent problem."
Thank you John for sharing this info!
HP Designjet 450c or 430 Orientation
Network can connect via a HP External Jetdirect Box – There is no internal card on this plotter.
Leave the plotter ON and connected to electricity via a surge protector. It hibernates nicely and uses no electricity when it isn't processing. Don't turn it off unless it gets into a suspended error code where there's nothing left to do.
Paper Jams: The moment you hear paper crashing you can do one of three things - Push power button, disconnect from electrical power, drop the clutch lever. The preferred option is pushing the power button because the plotter will need to "re-set" itself. After you've turned it off, push the clutch lever down, manually move the carriage away from the scene of the accident, to the left or right as is convenient. Now pull the paper out of the plotter making sure that all pieces are accounted for...as a small fragment of paper can make problems later. If there is paper under the roller use a file folder or thin cardboard to push under the roller and then slide from left to right to push any paper remnants up to where you can grab them.
Lubrication: Use Mineral Oil (aka: Baby Oil) or Tri-flow Oil. Do not use WD40 or grease of any type. While plotter is off put 2-3 drops of oil on the rail that the carriage slides on. Now grabbing the black carriage belt, drag the carriage from the left to right and back again letting the carriage distribute the oil evenly. Also drag the cutter across the fresh oil. If you see black debris on the rail, take a towel wipe of the rail and repeat the oil process until you don’t get any debris back. This process has cleaned some of the accumulated dust and gunk from under the bushings. How often should you do this? Every 2-3 months. If you can't remember when you last did it, you should do it again!
Encoder Strip: The encoder strip tells the carriage where to be on its travels from left to right and back again. The plastic silver strip has hundreds of miniscule marks on it. You'll know it is misbehaving if your carriage starts and stops in unusual spots. Clean only with water and a soft cloth…don’t use alcohol or window cleaner…don’t try to get all the black off…just get rid of marks that
may confuse or obscure the tiny lines.
Error Messages: Most error messages are able to be cancelled by the user. If that doesn't work, you'll need to look up the error message in the User Guide or just put it into a Google search like this: "Data + Cartridge Error Designjet 450C" or go to HP.com Wide Format Forums.
User Guide: The user guide can be found at many places on the internet. It is made for the user to learn the basics of operation.
Service Manual: The service guide can also be found on the internet and it is used by repair technicians to figure out and repair whatever is wrong with the plotter.
A misbehaving cartridge can sometimes be fixed by doing these things in order.
1) Hold under running hot water, shake it and look for two lines of ink when pressed to a damp folded paper towel.
2) Soak for an hour in a quart of hot water with a hearty squirt of liquid dish soap and a quarter cup of ammonia - then shake hard and look for two parallel lines on a damp folded paper towel.
3) Fold up 4 or 5 very wet paper towels until you have at least an inch tall gob of towel. Press down slowly and firmly then release slowly and the towels will create suction as they return to their original depth.
I tripped over this amazing HP Designjet Video page while looking for the answer to a customer's question. They have helpful videos for almost every model! To open the videos on their site right click on the photo for the video you want and choose "Open link in new window" ---
Click here for ALL the videos!
I was working on getting a 450c Designjet refurbished today. New belt, cleaned up inside and out, fresh spittoon and oiled the rail. Thinking all was ok, I put the covers back on and got ready to print. BOOGERS! The LOAD + ALIGN + MEDIA lights were on and I wasn't sure what it was that was causing this.
Looking in the service manual I found a number of things it could be. I decided to try the easiest thing and wiped down the encoder strip with a soft damp paper towel. Don't Use Alcohol If You Try This - just warm water! Wiped it all the way across from far left to far right. As I was wiping I noticed a couple of ink smudges on the encoder strip. They came right up on the paper towel.
Then with the plotter turned off I moved the carriage to the middle of the machine and restarted it. This lets the carriage "refind" itself with the clean encoder strip which is the GPS of the plotter. It tells the carriage where to be from left to right. IT WORKED!
Below you can see the suggestions from the service manual.
I write about common problems with older HP Designjets. I'm always available 10am to 10pm CDT to answer your questions!
# 40 Refilled Ink
5188-6700, C3190-60095, C4705-60082, C1633-40082 C2990A, C2991A 5063-1257 C2951A, 5063-1256, C2913A, 17302A, 31391A C4713-60181, C4713-60182, C3180-60012, A6144-63008, C4699-60082, 51644CA, 51644CE, 51644CL, 51640A, 51644C, 51644M, 51644Y, 51640AA, 51640AE. 51640AL, 51644MA,51644ME, 51644ML,51644YA,51644YE 51644YL, C4713-40038, C4699-40003,C4699-40004, C4699-00015,C3190-60082, C4699-40005,C3192-60001, C4699-60078,C3174-40011, C3876A, C3886A,51642A, C4696-60006,C3190-40029, C4704-60095,C3190-40041, C3190-40052,J3258-61041, J2591-69001, J2594-69001, J3258B, J2591A, J4102B, J2590A, J4101B, J3264A, J3265G, C3190-40045, C3178-00030, C4705-00017, C4696-60007, C6074-60460, 6040-0858, C3146-67901, C4699-60074, C4699-69039, J3265-69001, J2382-69003, J4102-69022, J2592-69001, J2590-69001, C4699-60064, C3190-60145, C4699-00008, C4699-60020, C4699-60011, C4699-60015,C4699-60014, C4699-60017,C4699-60018, C4699-60012,C4699-60019, C4699-60016,C4699-60013, C4699-60081,5188-5676, 0957-2340,0950-2623, C4699-60003, C3190-60132, 5183-5268,5184-2833, C3190-60096, C4699-60042, C3174-60013,C3190-60140, C3190-60142,C4713-60123, C6072-60286,C3174-60005, C4699-60002,C3190-80010, C1633-80005,C3192A, C4713-60098