QUBD TwoUp : x-gantry replacement ( trial narrow version )

thingiverse

This trial design from my previous version two provides extra 25mm x-axis print area. There is no change on the left half and lead screw nut holder. Changes from version two are as follows: Can bring the nozzle further than the stock printbed, meaning only those with a wider printbed can get the benefit. Version two already can reach the at most right of the stock printbed. Has a shorter grip to the horizontal rods. This requires precise output, which may be difficult for the original TwoUp without upgrades. Requires smaller bearings costing $7.69/10pcs at Amazon. Top : v2, bottom : v3 -- 25mm narrower Printing Instruction The key to this design is firm grip to the horizontal rods, and achieving precision similar to the original TwoUp can be very difficult. If your x-carriage suffers from sagging or wobbling, consider upgrading (or similar) to your TwoUp in advance. Relevant upgrades include: http://www.thingiverse.com/thing:962471 http://www.thingiverse.com/thing:952796 To implement this upgrade, print two parts of the attached design - one as it is and one mirrored. Next, print the remaining parts (x_gantry_left* and z_axis_holder) from [v2] design found at http://www.thingiverse.com/thing:952796/#files. Assembly Instructions are outlined below: Insert an M4 machine screw to the printed part. Then place an M4 washer followed by 2pcs of 624Z bearing, then another M4 washer. Insert an LM8LUU bearing next. Optional - you can also place an additional LM8SUU bearing for increased stability. Next, hook a puley belt onto the beraring, and finally sandwich all three shafts together. Required Hardware Includes: 7 pairs of M4x25 machine screw and nut 2pcs M4 washer 2 pcs 624Z (ID4mm, OD13mm) bearing. One example source for this is http://www.amazon.com/gp/product/B00AUB7M3C/ 1 pc LM8LUU bearing (from the original QUBD kit) Optional: 1 pc of additional LM8SUU bearing Resulting Product The pink sticker in the cover photo marks the extended print width. During printing, the printbed must be lifted to prevent the hotend from touching the printer base frame.