Difficulty
Moderate
Steps
14
Time Required
- 3. Y axis frame 14 steps
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Quiz
0
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We are using t-nuts to bolt parts and plates on the extrusions. Those t-nuts are slide inside the extrusion.
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Bear Upgrade 2.1 comes with custom t-nuts that can be inserted in only one direction.
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If you use Openbuilds hardware or other kits your t-nuts needs to be inserted in a certain orientation.
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Take one of two longest extrusions. It is 370mm long.
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On the 20mm face of the extrusion, slide 2x t-nuts on each side (4x t-nuts in total).
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Bolt two plates on the t-nuts using 4 M5x10mm screws. Do not tighten them fully yet.
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Take your time with this step, the plate needs to be well flushed as it could affect the rest of the assembly.
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Make sure the plates are flushed with the extrusion and tighten strongly the M5 screws (no more than 4.5Nm if you have a tool to measure).
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To help aligning the plate while tightening you can use a second plates and a flat surface.
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Then press the plates against extrusions and the flat surface with one hand and tighten the M5 screws.
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Repeat this with the plate on the other side of the extrusion.
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Take the longest extrusions. It is 370mm long.
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Repeat Step 2 and 3 on this extrusion. You should now have two identical construction.
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Double check that all your plates are correctly flushed with the extrusion as it could affect the rest of the assembly.
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Verify that both extrusion are 370mm long.
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Take one the two middle length extrusions on the pile of not used yet. It is 331mm long.
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Prepare the following parts:
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1x previous extrusion and plate assembly
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2x t-nuts. Slide them in the 331mm extrusion as shown on the picture.
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2x M5x10 screws
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Assemble the corner with the M5 screws. Do not tighten fully yet, it will need some adjustment first.
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Take your time for this step, it will be a reference for the rest of the assembly.
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Make sure you are on a flat and plane surface.
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Place the assembly vertically.
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Be careful to not let fall down the assembly.
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Square the extrusions with a square.
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Apply pressure in the directions shown and tighten strongly the two M5x10 screws.
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This step can be easier if you have a clamp. You can then clamp the thicker side of your square to the vertical extrusion as shown in the 3rd image.
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Verify that the assembly is still square after tightening.
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Prepare the following parts:
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One t-nut.
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One M5x12 screw
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One 3D printed foot (foot.stl)
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Slide the t-nut from the right side.
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Attach the foot with the M5x12 screw. Tighten strongly.
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The corner with the foot is now considered as a reference. In case of doubt during the next steps, you know that this corner is perfectly square and you don't have to touch it anymore.
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You can double check that the five M5 screws are all strongly tightened. Do not exceed 4.5Nm.
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Take one the last middle length extrusions on the pile of not used yet. It is 331mm long.
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Prepare the following parts:
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Two M5x10 screws.
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Two t-nuts. Slide them in the 331mm extrusion as shown on the picture.
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Assemble the 331mm extrusion with the M5 screws. Do not tighten it fully yet, it need to be able to move a little bit.
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Take your time with this step. Don't hesitate to ask the help of someone else if you feel the need of having a third hand (don't use one of your feet).
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Take one the smallest extrusions on the pile of not used yet. It is 290mm long. It will be used for reference.
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Place the assembly at the end of a table
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Carefully insert the 290mm extrusion in between as shown in the 2nd image.
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Apply pressure in the directions shown and tighten the two M5x10 screws. To not overtighten them for now, only firmly secure the extrusion. movement of the extrusion.
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Prepare 12x t-nuts and test them individually with an M5 screw. This is a little tip to avoid having to redo all the hard work of squaring the frame if a t-nut is defective. You can thanks 3DMN for this handy tip :)
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Inserts 3x t-nuts on each side (12x in total) as seen on the 2nd and 3rd picture.
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Take 4x t-nuts and slide them as seen on the 1st picture.
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With 4x M5x10, assemble the second 370mm extrusion + plate assembly you have prepared in the beginning of this chapter.
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Do not tighten them fully yet!
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apply pressure
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tighten screws fully
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Insert wisdom here.
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