HP Designjet 500 fails printhead alignment issues printing

[alisonpt]

I have an HP Designjet 500 that is printing double lines I checked the printhead to see if they were aligned and it fails the alignment.

• I´m attaching the printhead alignment that prints and then it fails it.
• I print the paper advance alignment it prints it but when I load the sheet of paper to measure it. It also fails
• what do you guys think? Has anybody fixed this before?

[jasonmiamifl]

I would recommend you :

# 1  use a better paper roll.... your pic shown too much paper has wrinkles...

#2    clean the printheads & make sure they have clear inks out...inks looked dim 

Do the printhead alignment & make sure your printer pass.

[alisonpt]

Hello thanks for replying, the paper looks wrinkled because I fold it and put it in my bag. The printheads were cleaned, I took them out and removed the dry ink and cleaned the contacts.

Everytime I tried to do a printhead alignment it failed. I even took a black printhead from another plotter and it failed too. 

[jasonmiamifl]

From the past, I used DJ500 for over 12 years... most problems I saw  were belts, printheads, service stations...

Printhead problem #1... most frequent... I always had 2 set brand new on shelf to stand by.

If you could not solve that problem... get a new set with black packing box with cyan butterfly... 

those more late manufactured.

There are 3 type of boxes for different period of years...

Unfortunately some sellers remove the packages &  shown only in seal  foil & not

mentioned year...

If your printhead alignment keep failed.  Printhead mostly the origin..... trust me.

[jasonmiamifl]

I forgot to mention.

You must also check the belt condition & make sure it is good & not dropping tiny tiny black stuffs.

If belt is good, clean the encoder strip & the silver metal rod. also lubricate it..

[Mikeg81]

Hi,

Is the printer against a wall?

Have you try printing leaving some slack in the roll?

[rasheddul]

Hi,

Please at first check the printhead, service station is clean. Then check the carriage belt is good conditions with carriage motor/ paper axis motor. If all are ok you should check encoder sensor. Most of time (90%) this sensor issue, if you remove the dust. It will good quality print with dint head alignment.

Thanks
Rashed

I am not an employee of HP but I am an engineer @ HP Partner and I am share my knowledge from my own time.
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[alisonpt]

Hi Mike the printer is not against the wall it has space in the back, and the roll also has loose paper.

[alisonpt]

Yes I checked the belt and it looks fine is not braking yet lol. I also printed out the service print maybe you see something?

I think it might be the printheads since they are not aligned hopefully.

I´m attaching the service print  I saw the error 

[rasheddul]

Hi,

Please clean the dust on encoder disk. It should problem will solved.

Rashed