Re: T1200 MFP printer/scanner question
Not to be off topic but, regarding the tool.. I wouldn't expect a mechanic to charge me for a tool to fix my car. It's a cost of doing business. I wouldn't charge my customer for the tool, personally. And on the same subject, despite all of the Designjets I've worked on, replacing the paper advance motor has been an extremely rare event. The only time I can recall was a 500 that needed one simply because it was worn out.
The roller encoder and sensor has everything to do with the paper advancing correctly. If they did replace it and the same exact problem still exists, then I would suspect the electronics module before I suspected the paper advance motor, assuming they didn't damage the new disc when installing it. It has to be pristine-clean. I suspect they put the old roller encoder disc back in after replacing the motor, and thus the same problem still exists. I'd also suspect the encoder sensor is OK; usually when it dies the printer will just throw 86:01 errors constantly thinking there's a paper jam.
Any encoder, disc or strip, is extremely sensitive to damage and misinterpretation by the sensor reading it. I made this picture by scanning a 500 encoder disk, brand new, at 1200dpi, and had to zoom in on a section just to finally see the actual lines.. and ironically, it appears to already have some damage. But I hope it conveys how fine these microscopic lines that the sensor is looking at are.
explorer_2018-07-13_07-44-13.jpg
So, if they replaced the encoder disc, inspect the old one. And have them replace the disc again, and the sensor. The disc must be cleaned (allegedly with alcohol but I would just use a damp, lint free cloth) after it's installed. Also the service manual tells you to never install a previously used encoder sensor.. (I assume they mean from another printer though.) Then make sure they do the calibrations/tests outlined in the service manual when these components are replaced (Paper Drive, Paper Advance Calibration, Electronics Module, Sensors.)
If the advance calibration fails, run the line sensor test. But, if you run a print and have the same 3.5" breaks in it.. I don't think the advance calibration could ever complete successfully. With the motor, encoder disc and sensor ruled out, the next item would be the electronics module, in my opinion.
Sorry for being so long-winded.
Kiran
Not to be off topic but, regarding the tool.. I wouldn't expect a mechanic to charge me for a tool to fix my car. It's a cost of doing business. I wouldn't charge my customer for the tool, personally. And on the same subject, despite all of the Designjets I've worked on, replacing the paper advance motor has been an extremely rare event. The only time I can recall was a 500 that needed one simply because it was worn out.
The roller encoder and sensor has everything to do with the paper advancing correctly. If they did replace it and the same exact problem still exists, then I would suspect the electronics module before I suspected the paper advance motor, assuming they didn't damage the new disc when installing it. It has to be pristine-clean. I suspect they put the old roller encoder disc back in after replacing the motor, and thus the same problem still exists. I'd also suspect the encoder sensor is OK; usually when it dies the printer will just throw 86:01 errors constantly thinking there's a paper jam.
Any encoder, disc or strip, is extremely sensitive to damage and misinterpretation by the sensor reading it. I made this picture by scanning a 500 encoder disk, brand new, at 1200dpi, and had to zoom in on a section just to finally see the actual lines.. and ironically, it appears to already have some damage. But I hope it conveys how fine these microscopic lines that the sensor is looking at are.
explorer_2018-07-13_07-44-13.jpg
So, if they replaced the encoder disc, inspect the old one. And have them replace the disc again, and the sensor. The disc must be cleaned (allegedly with alcohol but I would just use a damp, lint free cloth) after it's installed. Also the service manual tells you to never install a previously used encoder sensor.. (I assume they mean from another printer though.) Then make sure they do the calibrations/tests outlined in the service manual when these components are replaced (Paper Drive, Paper Advance Calibration, Electronics Module, Sensors.)
If the advance calibration fails, run the line sensor test. But, if you run a print and have the same 3.5" breaks in it.. I don't think the advance calibration could ever complete successfully. With the motor, encoder disc and sensor ruled out, the next item would be the electronics module, in my opinion.
Sorry for being so long-winded.
Kiran
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