There are three different rail block sizes provided - Rail block 18p1.3mf, Rail block 23p4.3mf, and Rail block 25p4.3mf which correspond to the diameter of the Y rail in millimeters. You will need 8 for a 4’ build and 14 for a 8’ build. Rail Block note- You want the gap between these to be no larger than 200mm (8”) or less. If you do use a flat part you will need to print both XZ Leadscrew Stub Right.3mf and XZ Leadscrew Stub.3mf. There are three different brace sizes provided - Brace 25.3mf, Brace 25p4.3mf, and Brace 23p4.3mf which correspond to the diameter of the X rail in millimeters.įor US based builds, the recommended X rail size is US ¾” EMT conduit which has a diameter equal to 23.4mm, so print the Brace 23p4.3mf parts for this size X rail. 2’ wide builds need 6 total,Ĥ foot versions need 8 total. Wheels Spacersīrace note- Print the two left and right end braces with 50% infill and oriented so you can have the top facing out on each end, and the rest with 30% infill. The bearings are preferred, should be more precise and make for a more forgiving build. The urethane wheels might provide for a smoother ride overĪ rough table or debris with the downside being a bit of “give” and the possibility of the wheels steering a non parallel build. Optional Version- You can use 58-62mm X 25mm urethane wheels with the optional brackets. More than 80% nozzle diameter to keep overhangs working. Thicker layers since these are large parts, no PLA is recommended for ultimate rigidity, otherįilaments should be evaluated for rigidity. No supports needed, keep the default orientation. Version two instructions are here Parts Needed ¶ Printed Parts ¶ ![]() So the lower the axis the more rigid the machine. This router is most rigid when working near the table surface, opposite of most conventional gantry CNC machines. The answer is not making a taller machine. This keeps the Material Removal Rate very high. Make the table surface adjustable by using something like a drop table. You want to keep the machine as low as possible and Now if you need to cut a few millimeters off really thick material (facing a slab), this can be a great machine for that. If you need to cut more than 1.5” deep this is not This allows for 1.5” of cutting depth, that is a lot. The Z direction (height) is best kept to 80mm. Width (X axis or “Beam”) should always be the shorter axis. ![]() Two rails are extremely difficult toĪlign, and fully constrained rails do not allow for easy removal of the machine. ![]() The single Y rail keeps the machine properly constrained while maintaining ease of use. This CNC router can handle any length (within reason), the Y direction is only bound by your table length. Getting Started, cutting your strut plates LR2 to LR3 hardware differences for updating your build
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