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I believe most if not all hotends use the standard 40watt heater cartridge. Someone correct me here if I am wrong. But so far as I know that is the standard. It is not a temperature issue with...

Ok first off the forward current I measure to the stepper motors is usually under 1v. BUT ANYWAYS, If it help you understand MOST control boards support 12 or 24v input. And most printers run nema17...

If you are worried about pushing a lot of filament fast then you will want a volcano hotend. And Just so you know the titan is one of the lightest extruder setups you can get because the gear...

Grip does not equate to precision in 3d printing. reliability maybe. for precision we hunt more steps/mm of travel. Double drive gears do nothing for this effort so they can have no impact on...

My Tevo Black widow printer runs a proprietary extruder that has 5:1 gear reduction..

http://i1050.photobucket.com/albums/s405/AutoWiz/37_12.jpg

And My GEEETech i3 runs an MK8..
...

The gear reduction will shine more at slower speeds and also in more precise retraction control. because it is 3x as many steps to travel the same distance. It also shines when you start dropping...

Flexion:
https://flexionextruder.com/

or

Titan:
http://e3d-online.com/Titan-Extruder?gclid=COfP4rnH8tQCFSsW0wod10wE4Q

These are the top end solutions on the market right now. Flexion is a...