DIY 3D Tech

The On-Line Magazine for 3D Printing & CNC

TwoUp Z Axis Issues Fixed!

In this episode we will look at issues with the Z Axis on the QU-BD TwoUp! 3D DIY 3D printer kit and how ended up fixing it by editing the Marlin Configuration.h file and updating the revolutions for Z Axis.

 

The original line in the Configuration.h file was:

#define DEFAULT_AXIS_STEPS_PER_UNIT {88.88888888889,88.88888888889,1511.811023622047,88.57326053533955} //QU-BD_Ups // default steps per unit for Ultimaker

 

Whereas the updated line now reads:

#define DEFAULT_AXIS_STEPS_PER_UNIT   {88.88888888889,88.88888888889,1759.96626731320954,88.57326053533955} //QU-BD_Ups // default steps per unit for Ultimaker

 

So what we did was change the default 1511.811023622047 to 1759.96626731320954 in order to make the change.  As the math we used to come up with this number was:

 

(1511.811023622047steps / 8.59mm) = 175.996626731321 x 10mm = 1759.96626731321steps

The logic (which admittedly there is better) was when sending a 10mm movement to the Z Axis, it would move only 8.59mm so dividing then multiplying produced the new step count number.  Now this number is not “perfect” it is close because there is error in the 8.59mm because of gantry sag produced a significant variance.  However this is now at least workable.  I will be working to refine this however frankly with the flashing issue of the Mega 2560 and RAMPS 1.4 controller (see more here) I just wanted to see if it work which it did.

 

 

Best Prices For The CR-10!

Creality CR-10S Pro 3D Printer 300X300X400mm Touch Screen Silent Motherboard

$539.99
End Date: Tuesday Feb-25-2020 18:08:47 PST
Buy It Now for only: $539.99
Buy It Now | Add to watch list

Used Creality CR-10S 300X300X400mm 3D Printer Large Print 1.75 mm with EXTRAS

$212.50 (5 Bids)
End Date: Tuesday Feb-18-2020 12:39:25 PST
Bid now | Add to watch list

Used Creality CR-10 MAX 3D Printer BL-Touch 450X450X470mm 2019 New Arrival

$699.00
End Date: Wednesday Mar-4-2020 2:06:25 PST
Buy It Now for only: $699.00
Buy It Now | Add to watch list

Creality CR-10 V2/CR-10S Pro/CR-X/CR-10S 3D Printer 300X300X400mm 1.75mm PLA

$499.00
End Date: Saturday Mar-14-2020 9:48:47 PDT
Buy It Now for only: $499.00
Buy It Now | Add to watch list

Creality CR-10S 3D Printer Dual Z-axis Filament Monitor 300*300*400mm DIY

$399.95
End Date: Thursday Mar-12-2020 17:55:47 PDT
Buy It Now for only: $399.95
Buy It Now | Add to watch list