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Linear Rail Y Axis Wilson LulzBot 2020

by ant0ny, published

Linear Rail Y Axis Wilson LulzBot 2020 by ant0ny Jan 2, 2017
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Summary

Linear Rail Y Axis for any 2020 framed printer like a Wilson II or LulzBot etc.

The aim was to test the idea of a robust, mostly printed Y axis that could be scaled to take a larger and heavier bed.

UPDATE: Make the Linear Bearing Rail hole 0.2 larger in both end plates.

I used cheap Y axis is SBR12-500mm Linear Bearing Rails and SBR12UU Sliding Block from ebay. To my surprise they where very straight and with the cost being so low I would consider this a better choice for even a 200x300 bed due to the fact the rails are so straight.

ADDED: Y_axis_motor_endplate_Open_TEST.stl another 0.2 opened up Look for the corresponding name with "Open" in the name.

Added:

Clamp blocks Y_axis_linear_rail_clamp.stl to clamp the Linear Rails to the Frame. The use M5 and M3 bolts and nuts to clamp the Y axis in place.

8x M3 x 60mm
8x M5 x 25mm

A test part Y_axis_endplate_TEST_12.15mm.stl to check if your Linear Rail will fit before you print a whole end plate.

Added: A DWG file bed_2030_lulzbot.dwg of proposed holes for the SBR12UU Sliding Block. This is a for a 200x300 bed and for 4 or 3 Bearing Blocks.

A DXF file 3030_heatbed.dxf for fitting the 24volt RepRap PCB Heatbed 300x300mm.

http://www.reprap.me/pcb-heatbed300x300.html

These 2 bed plates are UNTESTED and may need the 5mm holes adjusted if the Chinese Blocks are drilled off as they sometimes are. So a little care and checking to make sure it all runs free.

In the pics you will notice I have 3 bearings on the rails... I actually used 4 but 3 will work as good I would guess.

Print Settings

Printer:

LulzBot TAZ 6 Custom

Rafts:

Doesn't Matter

Supports:

No

Resolution:

0.2

Infill:

80%


Notes:

These are mechanical parts so I normally do 4+ peri and 70 to 80% infill

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I am doing a version @324mmm centers would that be good enough. Here is a mention here for another guy.

http://community.reprapwilson3d.com/t/finally-got-some-printing-going-any-advice-on-improvements-appreciated/777/12

I will try to get it done in the next day or so.

Any chance you would make one with a wider footprint? I have a 350mmx350mm heater, ~450mm bed, and would like some more stability on the platform by moving the rails out. The current design (Wilson 2) with this size bed has about 1/3 of the bed outside of the rails (going from memory).

Linear Rail Y Axis 324mm Wilson LulzBot 2020
by ant0ny

Awesome, thanks. I'll be printing it within a week, I'll let you know how it comes out.

There has been issues with the printed size for fitting the Linear rail. I tend to go for almost under extrusion to achieve as close to accurate printing as possible. As you know when doing holes etc you get shrinkage so maybe make sure you try the test peice and maybe get one of those calibration tests with holes to make sure you can tweak you settings to get it as accurate as possible..

Also print one first if it is too tight I would do the heat trick and heat up the Linear rail end with a heat gun and tap it into the hole. You can try taping it in cold.

I have contemplated making a simpler and probably more ugly setup to do the same thing as I have designed belt and motor brackets for OpenBuilds project that could be used for this setup.

Details are here http://openbuilds.org/builds/3d-printbot-500x500x500.4469/

Thanks for the info. I have been thinking of leadscrew for the Y axis also. What speeds were you getting with that setup? I've already blown 1 stepper running too fast with the huge bed, so I've slowed the speed (30mm/s) and acceleration way down. My bed vibrates at higher accelerations, which I believe the better Y footprint will help with, along with an aluminum honeycomb sandwich bed support.

I'm only running a 200x300 bed on this setup at the moment. If you go to the Wilson forums you will see Squid has a 400x400 setup on this... he is actually the guy that requested the 324mm spacing setup for his machine. He is a nice and helpful guy, so message him and he will get back to you.

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