Moai LCD Panel Interface
The purpose of this guide is to verify if the hardware is installed correctly and set up for printing. This guide does not deal with dimension accuracy and that is covered in a separate guide.
*Please make sure Moai is placed on a sturdy and level surface before begin working.
FEP Vat users, most of the information still applies to you. If there is a special instruction needed for you, it will be in this green font.
These are the check steps in the order which you will do:
Please do not pour the resin into vat until the instruction tells you so or it will make testing more difficult.
Moai is shipped with galvos and plate calibrated to work together. To make sure everything is still working after delivery, we will run three tests:
DO NOT INSTALL BUILD PLATE OR PUT ANY RESIN INTO VAT for calibration test
Click the Power Switch on the Front Panel to Turn on the Machine (Below pic)
Two things to look for here:
You should see this screen when Moai is ready:
Use the Control Knob above the Power Switch to move between “Print” and “Setup”
Press the knob to enter “Setup” (Double press to go back)
Please check your setting and adjust to match the picture below:
If the settings do not match, you can select and click on each entry to adjust the value to match the default values.
Then use the Control Knob to scroll down to advanced_setting and click to the next screen. Check to see if the settings match this screen also.
Laser power is a key setting. We like to set it around 57-58 for Peopoly standard resin. Please check against that. Non-Peopoly resin may need to have a lower or higher laser power.
For FEP Vat users. The Z Reset Position should be 1816
Please download the following files:
calibration-circle.pdf: https://drive.google.com/open?id=0Bzke6lBHG_z5MkhwQjZ0bk5UaXM (This file is also located in your SD card’s pdf directory)
https://drive.google.com/open?id=0Bzke6lBHG_z5NmdFUmZENDZ0OEk (This file is also located in your SD card’s gcode directory)
Print the calibration-circle.pdf and cut it to the outer square and place it in the Vat. Insert the vat with the printed calibration-circle into the Moai.
NOTE: Make sure the Calibration Circle PDF is printed at 100% scale, do not use the Fit to page option. The dimensions of the printed box should be 5-1/8“ (130.18mm), and the largest circle should be 120mm diameter.
Note how the inside squares and circles are shifted. The side with the narrow spacing should be to the back of the Moai nearest to z-axis linear rail when the vat is installed.
For FEP vat users, use a specially made calibration file named:“calibration-circle FEP.pdf” https://drive.google.com/open?id=1S-L18AFP98fBC-eObGOiKP4XNvgacvXn
Circle test Gcode:
Extract the “P_yuan-test.gcode” from “P_yuan-test.zip” and place the GCode file in the directory called “gcode” on the SD card.
Insert the included SD Card in the Machine (make sure you insert with the back of SD card facing up):
Select Print from the Moai’s menu and Click Confirmed.
You should see the Z-Axis drops the Build Plate arm, tilt the Vat and begin to scan like below
Move the paper slightly such that the circle overlaps with the laser scanning path.
For additional help, use this calibration video: https://www.youtube.com/watch?v=gHHqfrhKt7M
Since Peopoly built Moai kit to test print before shipping, the leveling should already be close to optimal. The following steps are to help you check leveling and make small changes if needed.
You should run the leveling check again when you change vats.
1. Download this gcode and place it in the SD card’s Gcode directory https://drive.google.com/file/d/1REhwgXPzffKO1UOH15q6oeZvWlj-A3Lv/view
You will find this gcode
2. Install build plate on Moai and make sure the knob is tightened.
3. Locate the resin vat package and take out the vat. Make sure not to touch the bottom part of the vat.
4. Take out the resin bottle that looks like this:
Shake well (for about 30 seconds) before you open it and then pour the resin into the vat (to the fill line. For FEP only pour 1/4):
The printer setup would look like:
5. Now insert the SD card into the Moai and power it on by pressing the power button. FEP Vat users, please make sure your z-reset position in the advanced setting is set to 1816.
Print the gcode by using the control knob to
This print takes about 20 minutes. This gcode contains 4 small cylinders with one at each corner of the built plate labelled; A, B, C, and D.
See the following pictures in Cura:
The lettering represents their location on the built plate. This helps you identify them when they are removed from the build plate.
The way to use these cylinders is that we want the printed cylinders to have a height of 10.6-10.8mm. The height of the cylinder tells us how much pressure is placed on the PDMS layer.
FEP Vat users, instead of 10.6-10.8mm you have a wider tolerance of 10.3-10.8mm
When the print is finished. They should look like this when the build plate is facing up to the ceiling:
Check the location by removing and cleaning (using Ethanol or IPA) one at the time and match them to this picture above. If they don’t match, make sure you are holding the plate in the correct direction.
Once you got all 4 cylinders removed and cleaned from the plate, go ahead and measure their heights and marked them by A, B, C, D.
For example, you may have A 10.4mm B 11.0mm C 10.65mm D 10.0mm This set of numbers represents how your Moai is leveled. You can use it to help you get to an optimal level (10.6 – 10.8mm) and share with those who are trying to assist you.
To adjust, first find the tools for adjustment. Locate this screwdriver from accessory box.
Then you have to remove the left and right panels and to look under the build platform and find the nuts like these.
There is one under each corner under the vat holder. The amount of adjustment to each nut is based on the difference between current cylinder height. This diagram can help you visualize better.
Using above measurements as example:
To adjust A corner, find the nut under A’s corner and turn it.
After adjustment, print the 4 cylinder gcode again, measure and adjust. Repeat this process until you have all 4 corners to be between 10.6 to 10.8mm
Download this test file: https://drive.google.com/open?id=0Bzke6lBHG_z5ajN6VU1scll6QTQ
This print should last about 20 minutes and print at the B corner, see below: (disregard the four moai’s in this picture)
A couple scenarios can happen:
1. The print is successful, print sticks to the plate and looks like the ring below:
2. Nothing is on the plate, a flattened piece can be found at the bottom of vat at the B spot
3. A partial ring is printed and seems to break off from the middle
4. A ring is print it but seemed to have a side of it getting cut off.
Here is a link to an expanded troubleshooting chart. https://atlas.mindmup.com/peopoly/moai_trouble_shooting/index.html
If it doesn’t work. Please redo the leveling and make sure you follow the steps.