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14. Calibration
a) Overview of calibration
This provides a brief overview of the calibration of the RF2000 v2.
• Determining the position with the smallest distance.
Here, you can determine the highest position on the printing plate that has the shortest distance from the extruder nozzle. All settings are
based on this position. Therefore, you should determine this position as precisely as possible.
• Basic settings of the upper Z-limit switch.
This setting usually is only required once. The only exception is when something changes on the printing plate or the extruders. Here, you
should at least check the setting and adjust it if applicable. If you have acquired a finished device, these settings were made at production
already. Since transport can also influence this, we recommend checking the proper settings.
• Heating up the setting temperature.
The set temperature here is the standard printing temperature of PLA (extruder 230 °C; printing plate 60 °C) or ABS (extruder 260 °C; printing
plate 120 °C).
Please note that the correct temperatures depend on the filament used. Therefore, we recommend repeating the setting with the
optimal printing temperature of the filament used.
• Setting the left extruder (extruder 0).
Here, the extruder (in the dual extruder the left one) is set to 0.3 mm in the hot condition for the printing plate scan (at the highest position of
the printing plate).
• Executing the Head Bed Scan
We recommend the performing the Head Bed Scan for PLA ("
Scan PLA
") or ABS ("
Scan ABS
"). In this case, the printer automatically heats
up to the corresponding temperatures. You only need to lower the two extruders to the printing plate upon request in the dual extruder.
For the quick head bed scan ("
Scan
"), you need to set everything manually, incl. the Z-offset. On this, observe chapter "14. e) Executing the
quick head bed scan". For the settings for the Z-offset, see the menu "
Configuration
" - "
Z Calibration
" -
"
Z Offset
". Alternatively, the Z-offset can also be controlled via the G-code.
b) General notes on calibration
Attention! Never touch the hot extruders or the hot printing plate! There is a danger of burns!
When heating, there may be slight development of smoke or steam. This is normal. Please ensure the corresponding ven-
tilation.
No filament may be entered in the extruders during calibration, since the measured values would otherwise be falsified.
If there already is some filament in the extruders, it must be completely removed from the two extruders before calibration.
For this, observe chapter "15. c) Removing and changing the filament" or method 3 in chapter "21. b) Cleaning".
Also ensure that the extruder nozzles are clean on the outside. If they are contaminated, clean it as described in chapter
"21. b) Cleaning".
The two extruders or the two nozzles must be cleaned so that no filament escapes anymore when they are heated to print
-
ing temperature.
Ensure that the distance bolts are completely screwed into the lower table, the printing plate is supported level on the
spacer bolts and the four attachment screws are completely screwed into the spacer bolts. The printing plate must not
wobble!
The different heat bed scans cannot replace correct basic settings of the limit switch for the Z-direction or the setting of the
distance between the nozzle and the printing plate. It serves to balance out slight irregularities of the printing plate while
printing.
