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xman12 04/06/2021
My intend to purchase this „Aluminium Dual Gear/drive Extruder Kit“ was to go arround the problem with the filament is touching the x-axis motorspindle. Everybody should know that Ender do an design fault to mount the extruder stepper so close to the Z-Axis motorspindle! When its touching it the filament will transport the grease into the extruder. Since this filament-drive has smaller gears than the original, my hope was that the filament has an greater distance to motor spindle, but it were only arround 1,7mm more distance. Additionally you can’t use the second Air pipe holder because it is much to fat and touches also the motorspindle. So I still has to use an Silicon tube to protect the filament, so it fails in this manner. Because of the smaller gears you have some disadvantages over the original filament drive. 1. The pressure to the filament is greater per mm² ! So I fear that the PLA will break if the pressure will last for an longer time of standby time. I use the old spring to reduce the pressure by a little ammount. The better choice were to do not change the diameter but use the dual gears. 2. Since the gear on the steppermotor has fewer diameter you have to change the ammount of steps to an higher value. I messure the old diameter 10,96mm the new diameter is 7,45mm. Since the old steps should be 96 steps (I do not confirm that yet) I calculate 10,96mm/7,45mm * 96Step = 136,816 Steps other reviewers talk about 139Steps. 3. It can be but that is not sure or tested yet. Because of the much higher step count it is possible that the stepper motor is a little louder than before. Since I have silent steppers I expect not much difference. 4. You can’t use the blue transport wheel anymore to manually transport the filament to the extruder. The axle of the Steppermotor is to short to mount the wheel again. 5. I am not sure but I think that the second Gear has no ballbearing against the originally one.
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