LU-202: Replacing the Lift Wires

[orestesp]

Test if everything works! It is very easy to get something wrong, trust me! IMG_20210224_104740-min.jpgIMG_20210224_104751-min.jpgIMG_20210224_104757 - Copy-min.jpgIMG_20210224_104803 - Copy-min.jpgIMG_20210224_132002-min.jpg

Regards,
Orestes.

[blackcat4866]

Re: LU-202: Replacing the Lift Wires

This isn't an easy operation. Thanks for sharing your thoughts.
Congratulations on your success! =^..^=

[allan]

Re: LU-202: Replacing the Lift Wires

Good job on that.
It gets in that state because of a dirty photo interrupter sensor, the one that detects the top of the stack so that the lift plate will stop lifting. If its not working then the plate will just continue lifting until it destroys itself. Wish they included a cut off switch or a torque limiter of some sort.

I scrapped the last LU that did that.

[rrrohan]

Re: LU-202: Replacing the Lift Wires

Why did you accept delivery of a faulty unit?

Sent from my Pixel 4 XL using Tapatalk

[orestesp]

Re: LU-202: Replacing the Lift Wires

Good job on that.
It gets in that state because of a dirty photo interrupter sensor, the one that detects the top of the stack so that the lift plate will stop lifting. If its not working then the plate will just continue lifting until it destroys itself. Wish they included a cut off switch or a torque limiter of some sort.

I scrapped the last LU that did that.

I do not think that this is the case, though I could be wrong (is there a 2nd photo interrupter sensor apart from the one on the bottom on the drive side?). When I initially jiged the door, the lift plate came all the way up, and when it realized that it couldn't go any further up, the machine threw a code. Unfortunately, I didn't note down which one, but when I tried it the second time, I also held down the feed mechanism and the lifting stopped once the lift plate triggered the mechanical remaining paper sensor.

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[orestesp]

Re: LU-202: Replacing the Lift Wires

Why did you accept delivery of a faulty unit?

Sent from my Pixel 4 XL using Tapatalk

I bought the machine 2nd hand from a local listing, not from a dealer.

Sent from my Redmi Note 5 using Tapatalk

[orestesp]

Re: LU-202: Replacing the Lift Wires

Hello everyone,

I have so far fed a couple of thousands of sheets of both uncoated and coated stock of varying weights with great success using this unit.

However, for some reason unbeknownst to me, when I want to print duplex on 300 gsm paper (well, 2 x simplex to be precise), after printing on one side of the sheet, and reloading the paper in the LCT, it just won't feed. Not a single sheet. It happens on both uncoated and coated stock (300 gsm). I tried adjusting the feed pressure using the spring but that didn't help at all. The sheet isn't picked up by the feed roller at all.

According to the machine counter, the rollers are brand new (less than 6k). Has anyone come across this before? Anything I should try?

Thanks.

0-02-05-ca1da77e14662adfec3a1def581dfd08cf3186b5540ab98acb6e00bc626e25bb_cbff62b3.jpg

[blackcat4866]

Re: LU-202: Replacing the Lift Wires

It's the downward curl that is preventing pickup. You'll need to find a way to reverse the curl: weight the stack overnight, manually reversing the curl, ... whatever. the media must be flat to feed.
=^..^=

[BillyCarpenter]

Re: LU-202: Replacing the Lift Wires

It's the downward curl that is preventing pickup. You'll need to find a way to reverse the curl: weight the stack overnight, manually reversing the curl, ... whatever. the media must be flat to feed.
=^..^=

Makes perfect sense to me. Good stuff.

[orestesp]

Re: LU-202: Replacing the Lift Wires

It's the downward curl that is preventing pickup. You'll need to find a way to reverse the curl: weight the stack overnight, manually reversing the curl, ... whatever. the media must be flat to feed.
=^..^=

That's a bummer. Just out of curiosity: Why is this tray so sensitive to this while the bypass tray doesn't seem to care at all?

[BillyCarpenter]

Re: LU-202: Replacing the Lift Wires

That's a bummer. Just out of curiosity: Why is this tray so sensitive to this while the bypass tray doesn't seem to care at all?

Just out of curiosity, what is the max weight for paper for the LCT vs bypass?

[blackcat4866]

Re: LU-202: Replacing the Lift Wires

It's a completely different feed system. and yes, downward curl will cause jamming from any/all trays.

Yes, it's 300gsm maximum. Glossy stock less. =^..^=

[BillyCarpenter]

Re: LU-202: Replacing the Lift Wires

It's a completely different feed system. and yes, downward curl will cause jamming from any/all trays.

Yes, it's 300gsm maximum. Glossy stock less. =^..^=

Correct me if I'm off base. The downward curl creates air between the sheets of paper. The more sheets of paper, the more air pockets you're gonna have and the paper will give way when the pick up roller drops down and that's what causing the jams??

[blackcat4866]

Re: LU-202: Replacing the Lift Wires

Correct me if I'm off base. The downward curl creates air between the sheets of paper. The more sheets of paper, the more air pockets you're gonna have and the paper will give way when the pick up roller drops down and that's what causing the jams??

Yes ... and, since the stack height at the pickup tire is higher than it should be due to the curl, the leading edge is below the paper outlet, feeding the paper into the left edge of the tray, instead of feeding it into the bite of the rollers.

Upward curl is OK. Downward curl just doesn't work. And 300gsm really holds the curl.
Excellent! =^..^=

[BillyCarpenter]

Re: LU-202: Replacing the Lift Wires

Yes ... and, since the stack height at the pickup tire is higher than it should be due to the curl, the leading edge is below the paper outlet, feeding the paper into the left edge of the tray, instead of feeding it into the bite of the rollers.

Upward curl is OK. Downward curl just doesn't work. And 300gsm really holds the curl.
Excellent! =^..^=

I didn't think about the height of the stack...though I should have. Good stuff once again.