Comments on: 3D Printer Extruder Filament Drive Gear Review & Benchmark http://airtripper.com/1676/3d-printer-extruder-filament-drive-gear-review-benchmark/?utm_source=rss&utm_medium=rss&utm_campaign=3d-printer-extruder-filament-drive-gear-review-benchmark 3D Printer usage and modifications plus Arduino powered electronic projects and 3D Printing designs. Sun, 08 Jun 2014 11:30:05 +0000 hourly 1 http://wordpress.org/?v=3.8.3 By: Mark Heywoodhttp://airtripper.com/1676/3d-printer-extruder-filament-drive-gear-review-benchmark/#comment-596 Fri, 20 Dec 2013 05:03:46 +0000 http://airtripper.com/?p=1676#comment-596 Hi Jason,

The filament does curve round the MK7 Drive Gear, but with it’s large difference in the effective diameter against the MK8 Drive Gear, a little extra filament friction is minimal compared to the already reduced torque of the stepper motor.

I did recommend using the MK7 Drive Gear on a planetary stepper motor later in the post, it’s larger diameter will then become an advantage because of it’s wider surface contact with the filament; I reckon you have the best gear for your geared stepper.

MK7 Drive Gear on direct drive extruders has worked reliably, it’s only when there is a problem with the hot end where the stepper motor starts to stall.

Mark

]]> By: Jason Wuhttp://airtripper.com/1676/3d-printer-extruder-filament-drive-gear-review-benchmark/#comment-595 Fri, 20 Dec 2013 04:15:57 +0000 http://airtripper.com/?p=1676#comment-595 A thorough and scientific review. In the Airtripper V3 extruder, the filament path looks like designed for 7-8mm effective diameter gear. When putting a MK7 (10mm effective diameter), the filament will not be a straight line but a little bended by the gear. I am wondering if this will affect the result of the measurement.

Myself using an Airtripper variation for planetary stepper with mk7 gear with 8mm bore (from ebay) and a 1:5 geared motor. I am pretty satisfied by the performance.

Thanks!

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