"> Keeping the spool sync'd with the filament feed rate Recently bumped on my priority list: a powered filament feeder that automagically maintains the loop feeding the extruder, specifically to eliminate the usual feed tube with all the usual problems. The drive gear/pulley/wheel ramming filament into the hot end shouldn't also drag filament through a long tube!"
You might want to consider this from a different perspective. The linear feed rate at the spool is identical to the feed rate at the extruder. I only have a 4 axis controller, but you could treat the spool feed as an additional axis whose feed rate is the same as the 4th axis. "> 4) Temperature reading. Dan Newman wrote some code for the TC4 thermocouple shield that converts it to a USB HID hal_input device that I'll be using with my M2 printer: http://softsolder.com/2013/06/10/tc4server-eagle-hal-device/"; That will work. Now that I think about it, measuring the table temp for a heated table bed would also be good. On Sat, Jun 15, 2013 at 6:29 AM, Ed Nisley <ed.08.nis...@pobox.com> wrote: > On 06/13/2013 06:12 PM, Charles Buckley wrote: > > 1) None of the current GUIs are really good for this, > > I've been using http://gcode.ws/ to visualize the actual paths within > each layer, but that's probably too weird for most folks. > > > Keeping the spool sync'd with the filament feed rate > > Recently bumped on my priority list: a powered filament feeder that > automagically maintains the loop feeding the extruder, specifically to > eliminate the usual feed tube with all the usual problems. The drive > gear/pulley/wheel ramming filament into the hot end shouldn't also drag > filament through a long tube! > > I think the simplest approach will be a filament position sensor so a > HAL circuit can run the feed motor as needed to maintain the loop > height. Those I've seen in the wild can benefit from HAL... > > Given a filament position station, I have a notion that would add > two-axis filament diameter sensing. That can feed into a HAL component > that would produce the filament area, which could then twiddle the feed > on the fly. > > > PWM to control the heating element. > > With control based on actual thermal properties and measurements, rather > than by-guess-and-by-gosh. I just laid in a stock of DC-DC SSRs for that > very purpose! > > > 4) Temperature reading. > > Dan Newman wrote some code for the TC4 thermocouple shield that converts > it to a USB HID hal_input device that I'll be using with my M2 printer: > > http://softsolder.com/2013/06/10/tc4server-eagle-hal-device/ > > > pushing as much of the machining steps into hardware as possible. > > I really want to use automagic probing to compensate for platform shape > & positioning, because there don't seem any cheap, flat, removable > hotplates out there. Methinks this one is easier to fix in the > kinematics than in the metal; the shape of the platform changes as it > heats up and nobody wants to measure a hot platform by hand. > > The M2 is rigid enough to do XY axis homing once per session and be done > with it, but the general case probably requires that on a per-print > basis along with the platform compensation. > > Let many LinuxCNC installations blossom! > > -- > Ed > softsolder.com > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Windows: > > Build for Windows Store. > > http://p.sf.net/sfu/windows-dev2dev > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
