"I only have experience with 1.75mm filament and a Bowden tube"
JohnSL,
I have a Printrbot Simple, and I am following this thread so that sometime in 2014, if I decide to, I can convert it to your 3DR design.
I am building a Mini Kossel, well I have the build completed except I am having difficulty with the extruder. I have no experience with Bowden tube and Airtripper extruder. Learning as I go.
I have some questions for you and maybe you could describe your experience with your extruders.
1. What size/type of Bowden tube are you using? the ID, OD, PTFE?
2. What design/type of extruder body are you using?
3. What motor are you using?
I have Phidgets motor 3317 5.18:1 planetary gear so it has a smaller round face and needs the proper extruder plastic body with the right holes.
I tried Johann's extruder body for his Kossel but I cracked the body tightening the screw to get the bearing to push on the filament more, so I am trying the Airtripper V2 body as modified for me by Jay Couture.
I have a 8mm shaft with a spur gear that makes the OD 12mm.
I tried using a 1.8mm ID PTFE tube but that didn't work. After measuring, the filament comes out of the extruder wider than 1.8mm due to the gear cutting into the filament and leaving ridges.
so, I am waiting for 2.0mm ID PTFE.
Ah, the little details keep delaying me.
Thanks for all your documentation, posting pictures and all the design work you have put into the 3DR Simple.
Richard
JohnSL,
I have a Printrbot Simple, and I am following this thread so that sometime in 2014, if I decide to, I can convert it to your 3DR design.
I am building a Mini Kossel, well I have the build completed except I am having difficulty with the extruder. I have no experience with Bowden tube and Airtripper extruder. Learning as I go.
I have some questions for you and maybe you could describe your experience with your extruders.
1. What size/type of Bowden tube are you using? the ID, OD, PTFE?
2. What design/type of extruder body are you using?
3. What motor are you using?
I have Phidgets motor 3317 5.18:1 planetary gear so it has a smaller round face and needs the proper extruder plastic body with the right holes.
I tried Johann's extruder body for his Kossel but I cracked the body tightening the screw to get the bearing to push on the filament more, so I am trying the Airtripper V2 body as modified for me by Jay Couture.
I have a 8mm shaft with a spur gear that makes the OD 12mm.
I tried using a 1.8mm ID PTFE tube but that didn't work. After measuring, the filament comes out of the extruder wider than 1.8mm due to the gear cutting into the filament and leaving ridges.
so, I am waiting for 2.0mm ID PTFE.
Ah, the little details keep delaying me.
Thanks for all your documentation, posting pictures and all the design work you have put into the 3DR Simple.
Richard