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Cadet Printer not printing magenta
Before I call in an engineer I thought I would ask here in case I’m overlooking something obvious.
My Cadet packed in today – failing to print magenta ink – the other colours are printing OK. I suspected it was the damper at fault and so to try and prove this was the case I switched it around with the black ink damper expecting the black to start playing up and the magenta to start working again. But surprised to find the magenta still not printing and the black printing fine with the magenta damper fitted. No longer convinced it’s the damper at fault but can’t see any other explanation. The pump is working fine (plenty of flow at the outlet when performing a head clean). Any ideas – am I missing something obvious?
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15 Replies
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noy helpful is it.
if you do a nozzle check is there no mag at all not even a few lines
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Hi Phil
I have had this problem with heads on my cadet.
in my case it was capping heads not sealing on the head.
have you tried disconnecting the waste pipe from in between the head and pump, and pulling the ink through with a syringe, when i did this the syringe was easy to pull, no Resistance and very Little ink pulled through. the seal at the head was letting air in, so it can sound like the pump is OK but it can not draw enough ink, only air. when you pull the syringe it should have resistance and draw ink.
i first checked the pump on mine and it too was showing some ink coming into the waste bottle from the said head but i think what happens when it it drawing air it will pull some ink through but not enough to clear a blocked head
I have also had a pipe on the pump draw air with the same effect. boy did that one take me some time to work out!
give me a call if you are stuck, hope above helps.
Paul
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Thanks guys – yes there is a little magenta showing Chris – but not a lot.
Paul – yes I have tried pulling ink the through with a syringe just before the pump. There is a lot of resistance but I did notice some bubbles (actually a lot of bubbles) coming through along with the ink which is one reason why I was blaming the damper. But a leaking capping station would fit the symptoms I’m seeing. Think I might pop back into work this evening to see what I can find out. Thanks Paul :thumbsup:
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I’m at the unit right now having decided it must be the capping station, lots of meticulous cleaning but still no fix.
When I draw the ink through I am seeing lots of small bubbles so air is leaking in from somewhere – question is where?
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you sure the cart is not empty or not fitting correctly
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Thanks for the suggestion Chris – I have checked and it’s not that.
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if you have pulled some ink through does it now print.
connections
cart to pipe
pipe to damper small O seal
damper to head small rubber seal
cap to bottom of head
cap to pump if old type pump pipe could be split inside pump.
move head to cleaning position top up the capping top with cleaning fluid rotate the pump drive by hand the fluid should be sucked away quickly.to move head away from caps with out cleaning
tell it to do a test print
when the head is over to the left lift up the front cover to stop it. -
if air is in the line from the cartridge to the damper, then you will find that the head will just play up… however if you left it for the weekend and come back in monday, then it could be the ink going backwards due to air getting in…
It took me a few months only to discover that air in the line is the issue.
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quote Chris Wool:if you have pulled some ink through does it now print.connections
cart to pipe
pipe to damper small O seal
damper to head small rubber seal
cap to bottom of head
cap to pump if old type pump pipe could be split inside pump.
move head to cleaning position top up the capping top with cleaning fluid rotate the pump drive by hand the fluid should be sucked away quickly.to move head away from caps with out cleaning
tell it to do a test print
when the head is over to the left lift up the front cover to stop it.while the m/c is idle take righthand cover off microswitch top righthand side put cleaning swap handle in to open the switch then do maintenance you can watch the sequence and see if ink is being pumped etc
will post a pic tomorrow to show what i mean
derek -
im getting the same problem phil, what was your outcome, i think mine is air in the pipes..
cheers
roffs -
I had to call in an engineer to fix it. I probably created more problems with my tinkering. The engineer thought that the root cause was blocked tubing between the capping station and the pump, but because I had changed the dampers and capping station and inadvertently allowed the ink to dry out in the head, I ended up having to pay for a new head as well. So the original problem was lost in the history. Having said all that I had recently switched to new inks, and I’m still not unconvinced that this was the root cause. Have you switched inks recently?
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what ink are you using phill?
I am using inktek £44.00 a 440ml – not bad, colours a bit brighter than roland eco but, there is always but, not quite as good on a abrasion test. but for the price not bad at all.
Paul
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Thanks Phil..
No, not changed the ink or done anything out of the ordinary?
Ive spent a hour this morning cleaning and pulling ink but no joy, got our trusty Kevin coming to check it out so i will fill you in later
Cheers
Roffs
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Well this problem has now re-surfaced again 😕
I have been trying to print large amounts of red – after a while the magenta fails and I just get yellow banding. A medium head clean fixes the problem (for it to only re-appear again when I next print a large amount of red). I’m wondering if the pump is at fault (even though it does appear to be pulling the ink through). A close examination reveals what looks like white grease oozing from the inlet and oulet ports. I have never noticed this before and wonder if this is normal or a sign the pump is about to fail?
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the white grease is used to make the pumps turn easier… as all it is doing is squeezing the pipe
sadly , maybe air in line somehow
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