You may also be interested this post if you have time.. it will be helpful
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Several months ago and friend and I both purchased HE3D K280s. Since that time, we both have had nothing but problems. Neither one of us knew anything about Delta style printers but we wanted the big print area and a challege. Boy did we get one.
Customer support is a mixed bag, his glass showed up broken, they told him to buy a new one. My power supply blew, they sent me a new one.
We both purchased Dual Extruders, recieved the extra fans that there is no way to mount unless you design your own.. https://www.thingiverse.com/thing:2822567
We also purchased the 3D Cyclops Laser.. to date I have had no success with that but more to follow.
Coming from a Creality CR10 to a HE3D K280 it is night an day. Creality is a finished solid product that is easy to set-up and use. The HE3D product has incomplete instructions and is a general pain to use.
I have devised 2 methods for calibrating using Repetier-Host and Octoprint.
Repetier-host is the manufacturer’s method. I like Octoprint the best, so it goes first.
Repetier-host calibration is here: https://makersteve.com/2018/09/02/ultimate-guide-to-calibrating-the-he3d-k200-or-k280-with-repetier-host-it-can-be-done/
This needs to be done on a stable level surface. I fixed my K280 to the wall with a bracket.. it doesn’t wiggle or wobble.
First you have to level the bed, off or on it does not matter. I use a DXL360S Digital Protractor Inclinometer Dual Axis Level
Zero’s are ideal.
Next you will need my Calibration worksheet to do the math for you. I have hidden the cells you don’t need to see. It works well in Windows split screen mode with Octoprint open.
Read it carefully, it covers everything… if your printer comes up with negative numbers for Y and Z, you will need to set a standard positive offset.
To begin with Octoprint you are going to need the Repetier EEPROM Editor.. and install it.. follow these steps.
Click the wrench in the upper corner
Scroll to Plug-in Manager
Search for “EEPROM”
Complete the Install…
Now you are ready to continue Calibration…
Attach the Z-probe Sensor to your hotend
Navigate to the Terminal Window and enter G28 to Home and then enter G29
You can check all of the “Suppress” boxes to limit the feedback you receive.
Your printer will begin calibration and touch 3 points, should look something like the video below.
Or you can view on Youtube here https://youtu.be/ppGVI78X0kc
Be sure to make sure the sensor does not fall off or cables don’t get in the way.
Your terminal window will provide calibration data as show below
Take the 3 Z-probe numbers as shown above and enter them in the spreadsheet below
Now go to the EEPROM plugin to enter the numbers in orange.
Click the wrench in the upper corner of Octoprint
Scroll down to find EEPROM Repetier Editor Plugin
Load your current EEPROM and scroll down to Tower Offset
Enter the two numbers from the spreadsheet as shown above.
Scroll back up to “Save EEPROM” – Hitting save at the bottom did not work for me.
Notice the “All changed values stored to EEPROM”
Exit to the main window in Octoprint and click the control tab and click the Home button. Command G28 in the terminal window will have the same effect.
After the printer completes the Home command, Enter G29 and do the whole process over again until your calibration results are very close.
Basically, G29, enter the result in the spreadsheet, enter the Orange into the EEPROM, save it and do it again. I have seen calibration in as few as six rounds.
In the case below I got them to calibrate exactly.
If you find your numbers aren’t getting closer or are not changing… you will have to put a positive number into all 3 tower offsets and begin the process again. This is the case with one of my printers so I enter 500 in the X, Y and Z Tower offset.. then I am good to go.
Now you will need to adjust the Z Max Length so your nozzle meets exactly where it needs to on the glass. This process is outlined below the calculation area on the spreadsheet.
Basic steps are …
STEP 1 Home / Command G28
STEP 2 Command G1 Z30 F6000 – bring down to 30MM Height in a hurry
STEP 3 Lower down to piece of paper so there is some friction and subtract height shown on the control screen on the printer from existing Z Max in EEPROM
NOTE: Should be a little less than 3MM – 2.97MM or so
STEP 4 Open EEPROM Settings and subtract from Z Max Height and enter result into Z Max Height and “Save to EEPROM”
STEP 5 You will want to home again or G28STEP 6 G1 Z0 F6000 to test, should be similar friction.
Now get to printing.
There is a ton of other useful stuff on Makersteve.com and more coming every week.
Be sure to check out my Ultimate Build Guide for Creality Ender 3
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