Adjustable bed for K40 on a budget

thingiverse

This is an adjustable bed designed specifically for the K40 laser cutter. The stepper controller operates on a voltage of 5 volts. Here's a comprehensive list of required parts: * A belt measuring 1250mm long and 6mm wide, available at aliexpress.com/item/32299384151.html * A stepper motor controller (note: avoid using speed settings 8 or 9 as they may overheat), sourced from aliexpress.com/item/32468170000.html * Two "B" type pulleys with a 5mm bore and no teeth, found at aliexpress.com/item/32880405344.html * Four pulleys measuring 8mm in diameter and 10mm wide, purchased at aliexpress.com/item/32878397240.html * One pulley with a width of 10mm and a bore of 10mm (dependent on the stepper motor type), available at aliexpress.com/item/32950329455.html * Eight 608 bearings, which can be sourced from anywhere * A T8 leadscrew measuring 100mm in length with a 2mm pitch and 2mm lead, accompanied by a matching flange nut (four pieces required), purchased on Amazon * Four M8 washers to be placed between the large pulleys and lower bearings * A stepper motor, compatible with this design and featuring the same shape as a Nema17 In addition to the above components, the following are also necessary: * Four 180mm square tubes measuring 20mm x 20mm in cross-section and 1.5mm in thickness * Four 280mm square tubes measuring 20mm x 20mm in cross-section and 1.5mm in thickness * M3 nuts and bolts for securing the leadscrew nuts and attaching the stepper motor The square tubes are designed to be press-fit, with pre-drilled holes provided in the 3D models for easy assembly. A sacrificial plate is required on top of the tubes; a simple solution is to attach it using double-sided tape. To assemble the motormount, position it below the left rail. It's essential to attach the motormount to the tubes after placement, as the entire assembly cannot be inserted into the K40 laser cutter in one piece.