I modified direct extruder to remote. it looks working good… it cost me 3 RMB. I just think remote extruder can make X axis a little bit lighter. direct or remote while one is better, how do you guys think about it?
But its a bit confusing.
You not have a remote extruder only the filament pushing mechanism is moved from the head to the frame ?
Or see i it wrong on your pictures?
If so I must I see a big disadvantage.
A problem would be the “stiffness” if you push the filament because of its flexibility part of movement will lost in bending and compression.
I think it looks good. You are saving the weight of the motor which would make less weight for the X axis and it could move faster or have less inertia. I would mount the motor such that the filament path from the motor to the hotend is as short as possible so as to lessen the amount of retraction you will need.
@Sebastian_Schmidt thank you for your comment … actually it’s a direct extruder,I tried to separate " pushing part " and "extruder part " to make the x axis lighter.
this tube made of PU ,It’s used for air compressor. its size: O.D: 5mm，I.D：2.5MM , usually the size of PLA filament is O.D 1.75MM.
:(. the big problem is the tube is making resistance when the flament is moving … you are right .
the result is not as good as i thought.but it still work.
have any good ideas?
@Alan_Thomason I took your advice,I cutted the tube to 20cm，it’s the shortest length. it will make trouble for the X axis’ moving . it’s looks much better… thank you! my friend.
You could switch to PTFE tubing (more slick) and shorten the tube as much as possible with minimal, large radius bends.
@Alan_Thomason PTFE ？ maybe i use wrong tube - -…ok …i try to seach the PTFE tube online …thx for your help … ^ ^
PTFE is also called teflon.
got it !!!
@Alan_Thomason But in Ultimaker, the PTFE is looking more than 500mm. Still their prints are good. How?
You definitely should reduce weight of printhead if easy to do.
The way I understand, print settings are more critical with Bowden type extruders - retraction, temperature, wiping, crossing perimeters, etc… Search for “Bowden extruder settings” or “Bowden extruder print tips”. One thing that should be mentioned, the main reason for using Bowden type extruders is to reduce mass and increase speed and acceleration. The problem is that your printer has a moving Y axis and it is very hard to reduce the mass of the bed very much. You can increase the speed of the X but you cannot increase the speed of the Y nearly as much because of the heavy bed. Some people have used a larger motor on the Y to allow for increased speed and acceleration. I have a Rigidbot and it’s geometry is similar to yours - I have worked on lightening the bed to improve my printing speeds; but, I still see “ringing” ripples in certain prints.
I have already ordered one meter long PTFE tube. O.D:4mm I.D:2mm . thx everyone .
@Alan_Thomason my purpose is not only to increase the speed ,but also wanna solve the problem the moving extruder part makes the printing object get a very bad surface.