I'm a little slow on the uptake here, but I've recently made a discovery (spurred in part by the speed printing discussion a few days ago):
* Higher temperature hot-ends can extrude faster.
So my question is: does +Printr bot
(or someone) have a table of recommended hot-end temperature to max flow rate?
I was struggling with jamming and heat creep on my +Printr bot
Simple (Maker ed). I finally noticed a max flow rate setting in KISSlicer. With my hotend at 195C, I turned the flow rate down to 2.75mm/S and completely stopped any jams/skips in the extruder. That effectively limits my print speed to well under 30mm/S (~20?).
A few days ago it hit me: If I turn up the temperature, I bet I can turn up the flow rate and keep the heat from creeping by ramming more (cool) filament through the hotend!
Turned the temperature up to 210 and the flow rate up to 7 the printer is printing much
faster (40-50+ mm/S) and no sign of jamming, slipping, skipping extrusion steps!
Since the first layer is printed slow to stick to the bed, I now actually start at 200C, 15mm/S speed for the first layer, then up to 210C and open the print speed wide open - limited by the flow rate.