Category: TwoUp 3D Printer Kit

Monster QU-BD TwoUp Modifications!



As in this episode we will be cover the many modifications made to the QU-BD TwoUp DIY 3D printer. As we have re done the The Y, X and Z Axis as well as have added bed leveling too Whew!

Here are some of the Thingiverse Links:
Belt Holders:
Spring Caps:
Z Axis:

QU-BD TwoUp Bed Leveling Project Part -1

In this episode we start the build of the self-leveling servo & switch combo for the QU-BD TwoUp DIY 3D printer we built a while back.  Our hope is this will improve the quality of the prints our prints by  adjusting for the level of the QU-BD TwoUp bed.  We also have listed the parts below we got from Amazon.

Parts List:

Micro Switch:
M2 Screws:


7.5-Gram DS75 Digital Sub-Micro Helicopter Servo

by E-flite [E-flite]
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Price: $14.99

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QU-BD TwoUp Bed Leveling Spring Holders

So we have been working on the QU-BD TwoUP 3D DIY printer again and one of the thing which we made where retaining cups for the bed springs.  We where having issues with the prints shifting as there was play in the (few thousands of an inch) and when the printer did infills the alignment would jump as the bed shift (assume it slid on the springs).  With any luck this will reduce the issue.  Also keep eye out for a video on this too.

XYZprinting da 3D Printer

by XYZprinting [XYZprinting,Inc]
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3D Printed Dual Relay Board on the DIY QU BD TwoUp Printer

In this episode of DIY 3-D will look at building a 3-D printed board for dual relay controller. As part of this we also have to use care is this relay board will switch line voltages so if you notice we’ve left the bottom on the board to protect and insulate from this. It’s also worth noting that conductive plastic should not be used print support boards for electronic components. In addition if you’re interested in finding out about this board you can get more information at this link (

5V Two 2 Channel Relay Module With optocoupler For PIC AVR DSP ARM Arduino

by Satisfy Electronics [satisfyelectronics]
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Glass Bed Clamps on Tinkercad

In this episode we will look at building a set of hold down clamps for the QU-BD TwoUp 3D DIY Printer kit.  As you might recall we where having issues with the melamine bed so we switch to glass however the shaking of the when doing in-fills was ruining the prints so we designed a set of clamps to hold the glass in place firmly.  The glass bed is 11.5 inches long and 7 inches wide.  We left a little room length wise as we want to add thumb screws to the bed for leveling in the future.  In addition, the glass is +/- 0.16 inches in thickness and the clamps are 4 inches wide.


TwoUp 3D Printer Flashing the Mega 2560 with Marlin

In this episode we will cover flashing the Ardunio Mega 2560 with RAMPS 1.4 drivers using the Marlin software for the QU-BD 3D DIY printer kit.

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.



Bed Leveling TwoUp 3D Printer With A Dial Indicator

In this episode we’re going to take a look at  bed leveling for the two up printer using a dial indicator.  A level bed is one of the key aspects in any 3-D print workflow as having a level that this is crucial for high-quality prints.   to achieve this we are going to use a 3-D printed bracket along with a digital dial indicator this will lowers a high precision measurement of the print bed.

iGaging Digital Electronic Indicator

by iGaging [iGaging]
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