When i print something there are excess ink that makes my work dirty.

It sounds like you are experiencing an issue with the red ink drum on your Risograph MZ1070E printer. The error code t44-513 can be caused by several factors, including a clogged or dirty ink drum, a faulty ink pump, or a problem with the ink sensor.
Here are some steps you can try to troubleshoot and potentially fix the problem:

1. Clean the ink drum: Use a damp cloth or cotton swab to gently clean the ink drum. Make sure to remove any debris or dried ink that may be clogging the drum.
2. Check the ink pump: Make sure that the ink pump is functioning properly and that it is not clogged or damaged.
3. Check the ink sensor: Make sure that the ink sensor is functioning properly and that it is not clogged or dirty.
4. Check the ink supply: Make sure that there is enough ink in the supply and the ink is not expired.
5. Check the ink filter: Make sure that the ink filter is not clogged or dirty
6. Check the ink drum unit: If the issue persist, you may need to replace the ink drum unit
7. Consult the manual: Consult the manual for specific troubleshoot and service information for your Risograph MZ1070E model.

If you are not familiar with these tasks, it is best to contact a professional or Risograph customer service for help with diagnosing and repairing the problem

Its not leaking print it self cleaning the print head nozzles, right side area called service station.. its dirty work and only professionals can clean it.

i think the problem is with your print head. i have the same problem before. when i put out the print head to check. there's a lot of excess ink. this may be the reason for the ink smudges on the corners of your print. and when you set your printer to photo printing. it is programmed to put larger amount of ink than normal printing. the best way is to have your printer checked by your service center or change your printhead to a new one. goodluck!

It is not easy, apparently the head where you put the inks are very dirty. the only way is to use a qtips and start cleaning in the area and remove excess ink has in the cartridge. Thanks

When the printer is _NOT_ printing, where do the print-heads go? Correct! They go to where ink-absorbers let gravity drain the excess ink into the absorbers.

I have not worked on such a large machine, but it sounds like the ink waste station likely need cleaning. All smaller inkjet printers have silicone wiper blades that clean excess ink off the print head surface, if the blades are heavily saturated in junked up ink they may not be cleaning the print head appropriately. I have cleaned many wiper sleds with warm water and Q-tips, but always on home or SOHO machines. If this is not something you feel comfortable doing, call a professional technician, I'm sure that machine is worth and simple service call.

Please check if there is not some dirt, or something blocking the contacts from reading. Also the ink level is measured by optical sensor that can also be dirty.
Also make sure you use an Original Canon cartridge.

Are you using genuine inks or compatibles/refills? Have you cleaned / aligned the print heads recently? Does it only happen on the second print? Could be a case of excess ink getting onto the rollers which then get hot and deposit the ink on the next paper coming through.
Also make sure you've selected the correct paper type before printing.

Usual thing is the carriage bar is dirty or dry. Open up the to lid so you can see the ink cartridges and as much of the silver bar they run across. Give the bar a wipe with a cloth and then oil it with some light oil eg WD40 squirted on that cloth. PLEASE MAKE SURE IT'S SWITCHED OFF B4 DOING THIS