Chariot / carriage

thingiverse

Here are two variants of a carriage designed to move along a 20x20 V-Slot type aluminum profile. The movement is controlled by a GT2 belt whose tension is adjusted by a tensioner. The connection with rods connected to the effector is provided by two countersunk magnets spaced 45mm between axes. The magnetic effector with 45mm between-axle associated with these carriages can be found here: https://www.thingiverse.com/thing:2024371 I designed two versions of the carrier to test if there's a difference in print quality between the two models. I guess the variant with magnets on the center of the carriage provides the best result. Indeed, the rods that connect the carriage to the effector exert constraints on the carriage, pushing them outwardly from the printer. More the points of application of forces (thus the magnets) are away from the center of the carriage, and more the lever arm is important. Therefore, undesirable movements should be amplified with the carriage model having magnet mountings on top. It remains to see if the stresses exerted by the rods are sufficient to affect the print quality... Otherwise, the advantage of moving the magnets up is that we gain 4cm of print height. Don't hesitate to make me your feedback by posting a comment. NB: All necessary materials support are included in the design; no need to activate this feature in the slicer. The assembly of a carriage consists of two printed parts: - A carriage - A tensioner Hardware for one carriage includes: - 3x Wheels: - 1x Wheel Type Solid V (tire + 2 x 625ZZ bearing + 1x M5 precision washer) - 1x M5x25 screws (to fix the wheel) - 1x M5 short washer - 1x Home end stop adjustment screw: - 1x M3x20 screw - 2x M3 Nut - 1x Belt tensioner: - 1x M3x25 screw - 1x M3 short Washer - 1x M3 nut - 1x Tightening on aluminum profile 20x20: - 1x M3x25 screw - 1x M3 nut - 2x Countersunk D12 Magnets d4 e4.75 Preparation: 1. Print and clean the two parts. 2. Remove print support material. 4. Make sure all fits correctly. Assembly: No need to go into a long and boring description; it's mounted as shown on the picture.