Dual Z Screw upgrade Guide for the Mega Zero v1.0

prusaprinters

<p>Ladies and Gents, This is my<strong>Dual Z Screw upgrade for the Mega Zero v1.0</strong>.</p> <p><strong>UPDATED</strong>: 29th March 2021</p> <p>I have replaced only some of the OEM parts and tried to make sure critical parts are identical - here are the parts I'm<em>currently</em> using:</p> <h3><strong>Printed Parts:</strong></h3> <p>Printed 2nd Z-screw mount and Spacers x1:<br/> <a href="https://www.thingiverse.com/thing:4804383">https://www.thingiverse.com/thing:4804383</a></p> <p>X-Gantry Crash leveler x2:<br/> <a href="https://www.thingiverse.com/thing:4808777">https://www.thingiverse.com/thing:4808777</a></p> <h3><strong>Purchased Parts:</strong></h3> <p>8mm pitch Lead Screw with Anti-backlash Nut x2:<br/> <a href="https://www.bilby3d.com.au/DispProd.asp?CatID=&amp;SubCatID=106&amp;ProdID=ptRodLead8x400">https://www.bilby3d.com.au/DispProd.asp?CatID=&amp;SubCatID=106&amp;ProdID=ptRodLead8x400</a></p> <p><strong>NOTE:</strong> 400mm tall Z-screws will hit your filament roll - I used T-nuts to move the holder to the center of the frame. 350mm is a better length if you can find good quality units with Anti-backlash Nuts. The units I used come with 4mm, non-threaded holes on the mount. You can either use M3 bolts + nuts or just tap them to use M4 bolts (which is what I did).<br/> <a href="https://cdn.thingiverse.com/assets/5b/86/24/a0/97/2021-03-29_14.04.45.jpg">https://cdn.thingiverse.com/assets/5b/86/24/a0/97/2021-03-29\_14.04.45.jpg</a></p> <p>Adjustable Metal Z-Axis T8 Lead Screw stabilizers x2:<br/> https://www.amazon.com/gp/product/B08T9PL29W/ref=ppx\_yo\_dt\_b\_asin\_title\_o00\_s00?ie=UTF8&amp;psc=1</p> <p>NEMA 17 Stepper Motor x2:<br/> <a href="https://www.amazon.com.au/gp/product/B06XSYP24P/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&amp;psc=1&amp;tag=thingiverse09-20">https://www.amazon.com.au/gp/product/B06XSYP24P/ref=ppx\_yo\_dt\_b\_asin\_title\_o02\_s00?ie=UTF8&amp;psc=1</a></p> <p>Aluminum NEMA 17 Stepper Mount x1:<br/> <a href="https://www.aliexpress.com/item/4001205490125.html?spm=a2g0s.9042311.0.0.51b34c4d6ySBzN">https://www.aliexpress.com/item/4001205490125.html?spm=a2g0s.9042311.0.0.51b34c4d6ySBzN</a></p> <p>5mm to 8mm Bore Flexible Couplers x2:<br/> <a href="https://www.amazon.com.au/gp/product/B083LD6Y5P/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&amp;psc=1&amp;tag=thingiverse09-20">https://www.amazon.com.au/gp/product/B083LD6Y5P/ref=ppx\_yo\_dt\_b\_asin\_title\_o02\_s00?ie=UTF8&amp;psc=1</a></p> <p>Dual Z-Axis Stepper Wiring adapter x1 (only required for stock MZ1 Mainboard):<br/> I made my own using proto-board but you can buy a Y-cable for this.<br/> <a href="https://www.amazon.com.au/yotijar-Stepper-Motor-Cable-Duale/dp/B08D3XK4BR/ref=sr_1_1?dchild=1&amp;keywords=stepper+motor+dual+cable&amp;qid=1615243515&amp;sr=8-1&amp;tag=thingiverse09-20">https://www.amazon.com.au/yotijar-Stepper-Motor-Cable-Duale/dp/B08D3XK4BR/ref=sr\_1\_1?dchild=1&amp;keywords=stepper+motor+dual+cable&amp;qid=1615243515&amp;sr=8-1</a></p> <h3><strong>Installation process for the second Z-screw:</strong></h3> <p>1/ Move the Z gantry up to about 180mm on the Z-axis<br/> 2/ Install the 2nd Z-Stepper motor - then attach the coupling to the stepper shaft and tighten it - leave a couple of mm between the top of the shaft and the landing for the Z-screw so they don't touch<br/> 3/ Install the z-screw into the coupling and tighten it<br/> 4/ install the screws mounting the z-screw Nut but leave them loose so it can move around<br/> 5/ Install your adjustable top z-screw shaft stabiliser onto the frame - ensure the shaft is straight (X-axis) before tightening the mounts. don't tighten Y-axis bolts yet.<br/> 6/ use the depth gauge on your digital calipers to measure the distance from the screw to the frame (Y-axis) just above the coupler.<br/> 7/ use that measurement to position the z-screw on the Y-axis in the top stabiliser and then tighten the bolts<br/> 8/ now that your z-screw is installed parallel to the frame, tighten the z-screw mount bolts attaching it to the X-gantry</p> <p>I'm using Nulon Extreme Performance Grease with PTFE to lubricate the Y-axis rails and the Z-screws:<br/> <a href="https://www.ebay.com.au/itm/Nulon-Extreme-Performance-Grease-with-PTFE-450g/313190833415?ssPageName=STRK%3AMEBIDX%3AIT&amp;_trksid=p2057872.m2749.l2648">https://www.ebay.com.au/itm/Nulon-Extreme-Performance-Grease-with-PTFE-450g/313190833415?ssPageName=STRK%3AMEBIDX%3AIT&amp;\_trksid=p2057872.m2749.l2648</a></p> <p>Now just enjoy results like this!<br/> <a href="https://cdn.thingiverse.com/assets/0d/1c/06/b3/ab/2021-03-29_15.37.08.jpg">https://cdn.thingiverse.com/assets/0d/1c/06/b3/ab/2021-03-29\_15.37.08.jpg</a></p> <h3> Print Settings</h3> <p><strong>Printer:</strong></p> <p>Anycubic Mega Zero</p> <p><strong>Rafts:</strong></p> <p>No</p> <p><strong>Supports:</strong></p> <p>No</p> <p><strong>Resolution:</strong></p> <p>0.2</p> <p><strong>Infill:</strong></p> <p>25% Cubic</p> <p><strong>Filament:</strong> X3D Pro PLA </p> Category: 3D Printers