Creality CR-10 S5 or S4 Y Axis lead Screw Drive System

thingiverse

This is based on my other experiences with lead screw drives. This one is designed specifically for the larger CR-10 S5 and S4 series machines, utilizing easily available parts that are easy to print. This upgrade is inspired by the [3DLS Complete Belt-Free 3D Printer](https://www.thingiverse.com/thing:4031698). You can view my first print here: https://youtu.be/r2r6bCbSP3Y I run SKR 1.4 on my machine, and this modification is not possible with the stock control board. What you will gain from this upgrade is significantly improved Y axis performance at the cost of some additional noise and vibration. The increased accuracy comes from the lead screw's ability to move in a more precise manner compared to the belt system. The process begins by printing the necessary parts, which include the nut holder, bed slide, and motor mount. You can use your caliper to measure 44mm and mark it on the nut holder for alignment with the front of the machine. To mount the nut holder on the bed, I applied some double stick tape to the nut holder and used my caliper to align it 44mm towards the front of the machine away from the motor. Then, I started drilling out the 4 x M5 holes.  Once you're done with the drilling, be sure to deburr the holes so everything sits flush and flat! I highly recommend investing in a deburring tool. They are pretty cheap and will change your life forever. Next, I mounted the nut holder onto the bed using 4 x M5x10 screws.  I applied some super glue to the nuts to ensure they don't vibrate off during operation. To install the bed, slide it back onto the machine then install the nut and its base onto the lead screw. Position it about center then slide the motor and rod over the back of the machine. Reach under and carefully push the nut into the nut holder on the bottom of the bed. Now move the whole assembly up into place on the back rail, making sure the lead screw goes over the top of the front rail. Next slide a locking collar and spacer over the front end of the rod then place the front bearing holder on the front rail, do not tighten either the motor holder or front bearing to the rail yet.  It should look like that at this point. Now push the locking collar and spacer up to the front bearing so the coupler and screw are pushed tight back against the motor and tighten the lock collar.  Move the screw by hand till the bed is as far back as it will go then carefully tighten the screws on the motor mount down and move the bed forward as far as you can and tighten the front bearing in place on the rail so it all stays aligned. Next, update and flash your firmware to set up the new motion for the screw. Test it then reinstall the bed and start printing! #Thank you!