Using two extruders on a long Bowden tube one assisting the other…
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I think I like the creepy looking room more then the idea of a bowden tube inside the drag chains.
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OK then. You have plenty of room above the printer and the extruder seems to be mounted on the X carriage. So, if it were me, I'd simply suspend the reel of filament over the centre of the bed. Have it on a rod hanging from the ceiling if you like, or build an extension to the frame. Then you can do away with one of the extruders and all the Bowden tubes apart from a short one between the single extruder and the hot end. It may not look quite as tidy, depending on how you suspend the filament reel but it'll work a hell of a lot better.
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Reason for the current arrangement is for a heated chamber i.e. the hole thing will eventually be enclosed
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You could still make a small hole in the top, say 4mm dia to take the filament. If you heat all that filament that is in that 5 metres of Bowden tubes with your current arrangement it'll go soft(ish) and will compound your existing problems.
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its not so much heating the chamber just keeping it consistent as you can see the printer is in a small mill without heating I'm sure the idea with 1x to 2x helper extruders is sound its just this odd behaviour from the furthest will it be due to length or something like that ?
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I agree that Bowden arrangement is a challenging design for the extruders. All other printers of this type have the Bowden's going over the top, not through the drag chains.
That said, the issue with the extruder motor sounds like a wiring one because it works fine with a shorter wire. I have not tried 5m long motor wires so i am not sure, but what you describe sounds like a (potentially intermittent) fault in one of the joins or connector pins or possibly even a break within the wires. Try a new set of wires, designed for flexing, that is a single run between the board and the motors.
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I just see something like PLA fracturing in that drag chain setup. It's also going to add far more friction to the equation. Sometimes you just can't get what you want.
Jeff
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@(In)Sanity:
I just see something like PLA fracturing in that drag chain setup…..........
Jeff
Absolutely. Slightly aged translucent PLA is an absolute bugger for doing that, even with my 250mm long Bowden tubes. It goes really brittle and breaks with the slightest provocation so I'd say the OP will have absolutely no chance of printing translucent PLAs. (Just my personal opinion you understand - no offence meant).
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@(In)Sanity:
I just see something like PLA fracturing in that drag chain setup…..........
Jeff
Absolutely. Slightly aged translucent PLA is an absolute bugger for doing that, even with my 250mm long Bowden tubes. It goes really brittle and breaks with the slightest provocation so I'd say the OP will have absolutely no chance of printing translucent PLAs. (Just my personal opinion you understand - no offence meant).
I would add in any aged PLA, Something that you can get away with using a direct or short bowden that would just never work with the drag chains.
Jeff
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Good news guys its all working fine now noticed small break in the wire on the cheap motor thanks to tony for that ! also found that i needed to change the 100:100 on the mix ratio to 1:1 for correct proportions i.e. it extruded a meter instead of say 10mm printed 100x that or something along that line but all seams well
and as for the brittle filament i will cross that bridge if it proves an issue thanks for the heads up i made sure the bend radius was not crazy for the hole run
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Awesome, hope everything works out really well.
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Below are pictures of the first layers am i over extruding ? also what hight do you guys recomend from the bed with a 1.2mm nozzle ?
First layer hight (Pictured )coming out at 1.2mm
https://drive.google.com/file/d/0B3qPSCAEaykvMmV1cm9EWXNETlhRTVdvSDRHbEQ3dHJkdVM0/view?usp=sharing
https://drive.google.com/file/d/0B3qPSCAEaykvTi0wMS1RV3FlUHlaYXBQeDJvNndJZGgwVEg0/view?usp=sharing
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It looks like you are under extruding more than anything else.
Layer height 0.6 to 0.8 for a 1.2 nozzle. I tried 0.3 but that was not a success.Can you do a test to see what kind of force is needed to pull the filament through the bowden tube? I use a hanging fish scale to measure pulling force. We can get 5 to 6 kilo's of pulling force.
What is the temp you need inside the chamber?
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figured as much was confused that cura spat out 1.2mm but i then realised i entered it into the wrong config tab… felt by hand yesterday pinching with fingers and couldn't really stop it
and basically after consistency more than anything hot maybe 30 deg..
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one other thing why dose the ip dress change every day is there a way to make it fixed ?
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You can probably get your router to always assign the same IP address to the DuetWifi. Have a look at your router manual, it's often called a DHCP reservation.
Manual IP address setting is on the firmware wishlist.
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I'm surprised that the IP address keeps changing. I've had 3 Duet WiFi boards on my network, and my router always assigns them the same addresses. I think most routers work this way, they remember the last several MAC addresses that connected to them so that they can give then the same IP address when they reappear.
