4 Attachment(s)
Itty Bitty Double FLEX V2
I just released Version 2 of the Itty Bitty Double FLEX extruder.
Attachment 8211Attachment 8212Attachment 8213Attachment 8214
This version has a bunch of changes to improve function and ease of use and incorporates several user suggestions:
- Better flexible filament control - A couple of people have reported trouble with flexible filament coming out of the channel and jamming under the hobbed bolt. This version has a much more tightly-constrained filament path, both above and below the bolt to keep the filament in place. It also supports using 1.75mm E3Dv6 hot ends with a PTFE liner, all the way up to the bolt.
- Improved printability - I redesigned many of the parts to make them easier to print. The forks on the idlers were difficult for many printers to reproduce; they're gone now, replaced by a filament feed hole. The square inside corners have been redesigned with an overshoot area in each corner to make the corners come out square and clean on even poorly-calibrated printers. Now the parts fit together easily without cleanup. The hot end cooling shrouds have been redesigned with support material that holds securely to the print bed, pops off easily when cool and peels off the part cleanly. The filament channels have been adjusted for a better fit, with and without a liner. The fingers on the part cooling fan shroud have also been adjusted so they fit cleanly without sanding or trimming.
- Hexagon AO support - A new fan shroud is provided for the shorter Hexagon AO high-heat-capacity hot ends.
- Leveling X Carriage plate -An X carriage plate with an extra eccentric cam hole makes leveling the hot end nozzles easy and repeatable.
- Broader Z probe switch support - The Z probe has been redesigned with more holes to accommodate snap switches with and without arms and wheels, while still keeping the contact point directly under the servo pivot.
- Low-profile shelf brackets - The shelf brackets now recess into the back plate, leaving a smooth side to register underslung X limit switches. This allows enough X travel on the 12" printers for the left nozzle to reach the entire bed area for single-material prints.
This new version retains all of the features from its predecessors:
- Supports E3Dv6 and Hexagon hot ends
- Designed for Hexagon or E3Dv6 hot ends on 27mm centers
- Short, straight filament path to accommodate flexible materials
- Uses the same hardware kit as all Itty Bitty Double Extruders
- NEMA 14 motors
- Silent GT2 belt drives with printed pulleys
- Integrated servo Z probe
- Cam-lock idler bearing pins
- Uses Clough42 custom hobbed bolts or standard MakerFarm bolts
- Lighter than a stock single Accessible Extruder
- Integrated hot end cooling
- Mounting hardware for Prusa i3v printers
The parts are free to download:
Detailed assembly instructions are here: http://clough42.com/go/ibde-assembly/
If you don't want to track down all of the hardware to build one yourself, complete hardware kits, hobbed bolts, motors, servos and even the printed parts are available.
E1 10 times faster and 10 times farther
- When I switch from E0 to E1 the drive goes 10 times faster
G91:T1:G1 E0.5 F30:T0:G1 E5 F300:G90
Both drives do about the same thing, T1 sounds rougher.
I HAD them both doing the same. Now they aren't.
I believe an M221 S87 jumped it into rough mode.
I had gotten it back with a M501. But, now it is staying rough.
I set micro steps to 16. I did a M502 (reset values), M500 (write them)
and that doesn't fix it.
I've changed so many settings that I think I just need to start over.
Ha... I thought you said working versions of Marlin!
Quote:
Originally Posted by
clough42
Which firmware are you using? I have working config files for a couple of versions of Marlin if it would help.
I'm using RC6 4/20/16 ... I had configured auto bed leveling on that but it doesn't DO anything.
I switched that to Mesh Bed Leveling with a Z Stop. (You have to level it with a piece of paper.
It ignores the Z-probe for G29 S1 or S2.) And somehow M420 S1 has to actually enable it???
It doesn't really 'say' in the code. (firmware. One is supposed to know.)
BUT, RC6 lowers the probe and smashes it into the bed (ignoring the z-probe) with a G28 X Y:G28 Z
---
Mesh bed level really doesn't know where the probe is. It assumes one levels with a piece of paper.
But it now uses the probe (but doesn't know if actually isn't even over the bed, how high, etc. Nightmare.)
Auto Bed Level knows where that probe REALLY is. But, takes the nozzle and grinds it into the bed (because
it actually isn't doing any Z adjustment...)
--
However, I went and fixed the firmware. But, my X axis NEEDs to be level or all heck breaks loose. So I shove
a shim to try and get the nozzles level... They are perfect right now. I'm using MBL not ABL. I have a Z min stop,
a Z probe, min and max stops all around.