This mod is for 3 types of extruders.
1st is Chinese knock off called DOTBIT. Its a copy of BONDTECH
DOTBIT will require shaving off some plastic so its bottom is flat. (see pictures for detail)
2nd is TITAN.
3rd is MK8 metal LEFT
Works with all 3 extruders. Tested each one before posting.
Files are named after what extruder they are designed for.
DOTBIT and TITAN extruders need to have a Nut Holder printed and placed inside the extruder.
Hole in those extruders has to be drilled to allow bolt to go thru the nut.
Everything else is self explanatory.
Low center of gravity.
Centered belt and pulleys will result in little to no whiplash effect.
Allot less weight.
Gain 10mm print space on X axis. You will see [Post L] model with offset created to do that.
Attach what ever size motor you like. I use small 26mm motor from E3D. Works OK so far but larger motor will give more torque so if you need more, get bigger motor or reuse original 40mm
Extruder is mounted to the carriage using special designed [Nut Holder] that fits inserted inside extruder.
That part holds the nut which is used to secure the entire extruder to the carriage using M4 bolt coming in from the bottom of the extruder.
This mod uses IDC ribbon cable 14 wires.
Wired as follows: 2 for hotend fan. 2 for cooling fan. 2 for termistor. 3 for heater (2 positive combined and 1 negative). 4 for motor. Thats 13 total but the terminal is 14 pins.
You gotta figure out how to wire the ribbon cable your self (i might post preview)
You can see some pictures of very similar mod i made while ago here
https://www.thingiverse.com/thing:550788 I used this mod for years and it worked great.
Need 2 M4 screws and nuts for them that would fit into the hot end clamp as well as into the extruder its self inside.
[Cover] or [FanFront] are used as clamp to hold ribbon ternimal attached to the carriage.
If you dont want fan on the front, just print the [Cover] to hold the ribon terminals and print [FanBack] instead.
Original smooth rods can be reused but i advice to get new set of rods and bearings as well.