Flashforge Creator Pro- lower default bed height, layman's help?

Hi, I'm VERY new to this and don't understand a lot of the tech-speak I see in here, trying to learn.

What I am experiencing is that the back right leveling screw is ALL the way tightened, and the bed is still to high (hitting the extruder and jamming on the first layer.) So I think I need to lower the default height somehow and was wondering if I can do this without taking the whole thing apart?

 

Can someone explain to me in simple terms what I could do to lower the starting default bed height on my printer? I use Makerbot Print software to set up my print jobs (I know how to use it and it's easy for me so please don't tell me right now to change it, I need to solve one problem at a time) Thanks!

 

I print on the blue sheets it came with and I like them.

I HAVE made sure the extruder tip is in right. 

The problem is 100% that the height of my bed is just too high when the print gets started, I can't even get a good level on the bed because that back right screw won't go any further, it's frustrating. I need more room to be able to get everything perfectly level. 

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It's also possible on the FF Pro for this to happen if you've tightened the screws in individually. When adjusting you should always turn two screws at once, at least at first. Try slackening them all, then tighten evenly when running the plate level util.

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That is controlled by the position of the Z-axis limit switch relative to the top of the Z-axis lift plate.  If you look at the very back of the printer, you'll see a little switch mounted on the back wall that the Z-axis lift plate makes contact with.  The point where they contact is the "zero point".  You can try shimming the Z-axis plate by placing an object (can be a 3D print object or something similar) on the Z-axis lift plate.  In fact, if you are using a glass bed, you have to shim the Z-axis for the very reason you cite.  Now, a stock printer shouldn't require shimming.  If you haven't modified things by adding a glass bed, it could indicate something is wrong somewhere else, perhaps in how you have the bed itself mounted to the Z-axis lift plate or a dislocated limit switch that isn't attached correctly.

 

You can find 3D printable shims on Thingiverse (https://www.thingiverse.com/search?q=z-axis+shim). In fact, if you look at some of the pictures on Thingiverse for those Z-axis shim prints, you can better see where the Z-axis limit switch, that I'm speaking of, is located.

 

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If you have tightened your screws all the way, and the bed is still to high, then your z end stop is not in the right place, and needs adjusted.  Loosen it, move it, and this will solve the issue.

You should never have to tighten your screws all the way on your bed, and you will never be able to keep your bed level is such is the case.  Sometimes these things are off when they are shipped, just need to move the end stop a little.

 

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