For anyone else using a Robo3d R1 plus+:
Extruder removal google searches (ex. to clear a jam) will often say "look for these two screws" - screws that don't exist on your model. Instead directly behind the "Do Not Touch" warning symbol sticker on the printer head there is a screw going vertically under the unit. LOOSEN this (do not need to remove) and you'll be able to swivel the silver clip on the top right hand side of the unit away, this will free the extruder head. Then pre-heat extruder to 220 and gently pull to remove filament jam. If you need I can send pictures of what I mean to you, just PM me.
Printing surface note:
On Robo3d R1 Plus + unit, printing on painters tape (frog tape in my case) works well and does not have to be changed between prints right away (most items will pop off very easily). HOWEVER, supports are too thin to have good purchase on the tape. Recommend if you are printing objects that need supports, best if you stick with glue stick method (har har).
I Am A…Artist, Maker, Designer
Tools I Use…
Printers: R1 ABS + PLA Model
Design Programs: Illustrator, Photoshop, Sketchup
3D Design Skill Level