Extruder scoring the upper x-axis smooth rod?  

RE: Extruder scoring the upper x-axis smooth rod?

Can you post a photo?

RE: Extruder scoring the upper x-axis smooth rod?

Posted by: @frank-10

now I can see that the actual rod is getting scored. It’s nail catching deep. Runs about 7” across the bar.

1: What grease did you use when you cleaned and degreased the linear bushings before they got installed?

2: Did any of the bearings drop out when you inserted the rods? 

RE: Extruder scoring the upper x-axis smooth rod?

https://photos.app.goo.gl/PwoV4VFtCayfBYo19

RE: Extruder scoring the upper x-axis smooth rod?

@tim-2

Hi Tim

1. no grease. Used straight from the pack which contained lubricant.

2. no bearings fell out.

RE: Extruder scoring the upper x-axis smooth rod?

@cwbullet

Please see photo here

https://photos.app.goo.gl/PwoV4VFtCayfBYo19

RE: Extruder scoring the upper x-axis smooth rod?

@frank-10

Can you post an image of "actual rod score"?  Which side of the rod is it on?

RE: Extruder scoring the upper x-axis smooth rod?

@cwbullet

Hi CW…The photo link shows the scored rod…do you need a closer photo?

RE: Extruder scoring the upper x-axis smooth rod?

video of the noise my printer is making. Only during 45 degree strokes

RE: Extruder scoring the upper x-axis smooth rod?

This is a Misumi bearing as shipped. The amber liquid in the baggy is NOT lubricant.

RE: Extruder scoring the upper x-axis smooth rod?

Hi Tim,

    Thx for the reply. Please see a pic of the MK3S+ assembly instructions for Y-Axis. It clearly says the bearings are lubricated.

https://photos.app.goo.gl/gwsuVEWqH1PQTSLE9

RE: Extruder scoring the upper x-axis smooth rod?

@frank-10

Yep - and I own a bridge in England I'd like to sell you right now for only a mere $200,000 in BitCoin to this address:

klasdklbsDAb dhjs667tg%%olkjbnsdfnj 

Prusa has been telling this lie since they started shipping Mk3 printers. They finally broke down and started telling Mini owners they must grease the bearings.

RE: Extruder scoring the upper x-axis smooth rod?

@frank-10

Oh, by the way Frank, how are those "lubricated bearings" holding up?  Honest - I've tried to tell people they must grease the bearings; I have pleaded with Prusa to tell people to grease their bearings. But here you are.

I'd be calling mailing screaming kicking my way to Prusa's front door.  They'd be shipping me a new set of rods and bearings overnight express, and paying any and all duties.

RE: Extruder scoring the upper x-axis smooth rod?

Well, they now tell you to lubricate them and sell the lubricant.  I would start doing so. 

RE: Extruder scoring the upper x-axis smooth rod?

If they now tell you to lubricate them - it must be very new!  My kit which arrived less than 2 weeks ago said they are pre-lubricated.  I guess I'm going to be doing a partial strip down 🙁

RE: Extruder scoring the upper x-axis smooth rod?

I have not built one in a year but the maintenance clearly says you need to do so.  

https://help.prusa3d.com/en/article/i3-printers-regular-maintenance_2072/

RE: Extruder scoring the upper x-axis smooth rod?

The build manual still says they are pre-lubricated...

I would expect lubrication to be added/changed as part of a maintenance regime.

RE: Extruder scoring the upper x-axis smooth rod?

@minormatt

You are right it is not there.  I must have read that on the forum.  Probably form @Tim.  

RE: Extruder scoring the upper x-axis smooth rod?

Prusa Knowledge Base | 2. Y-axis assembly (prusa3d.com) 

Step 19 for example "The printer's package contains a lubricant, which is intended for maintenance. No need to use it now the bearings are lubricated. "

RE: Extruder scoring the upper x-axis smooth rod?

@minormatt

I think that is the point of contention that either they are not well lubricated or not lubricated at all and people need to lubricate at the start and soon thereafter.