Because you can account for slop its still not ideal. You can can only go so far with software correction. The other point is that when you have gears that are constantly beating themselves to death your reducing lifespan and increasing user maintenance.
If you collect the following parts you can build a nearly slop free extruder.
1 - main gt2 pulley 20T (go for a 16T or a 12T version to increase torque)
2 - secondary gt2 pulley 40T
3 - 2x 5mm id bearings
4 - precision ground 5mm shaft.
5 - 1 precision direct drive gear ( Pick your flavor, I opted for a 8 dollar SS built piece with steel set screw)
6 - one appropriate closed loop belt.
7 - one rollerskate bearing
8 - misc hardware.
When designing the extruder make the motor mounts slotted to account for some adjustability and belt stretch.
All of the above parts can be bought for not allot of money from hobby shops and or online stores. There will be very little if any slop, and the extruder should function properly for hundreds and hundreds of hours. Coarse gears will beat themselves to death and or warp when the stepper heats up.
If you collect the following parts you can build a nearly slop free extruder.
1 - main gt2 pulley 20T (go for a 16T or a 12T version to increase torque)
2 - secondary gt2 pulley 40T
3 - 2x 5mm id bearings
4 - precision ground 5mm shaft.
5 - 1 precision direct drive gear ( Pick your flavor, I opted for a 8 dollar SS built piece with steel set screw)
6 - one appropriate closed loop belt.
7 - one rollerskate bearing
8 - misc hardware.
When designing the extruder make the motor mounts slotted to account for some adjustability and belt stretch.
All of the above parts can be bought for not allot of money from hobby shops and or online stores. There will be very little if any slop, and the extruder should function properly for hundreds and hundreds of hours. Coarse gears will beat themselves to death and or warp when the stepper heats up.