First off you can't do .5 layers with a .5 nozzle. Running those speeds would be better with a .8 or 1mm nozzle and .5 layers. A volcano type nozzle with a long melt zone will be better. You are going to be limited on plastics to print with because of no heated bed. I suppose you could clamp down a plate with a heater under it. Next you will be limited in Z height. Are all of your parts low height?tenaja wrote:I would like to add an extruder to my CNC mill. I want one that can take advantage of the speed I have available. My current printer can only go 30mm/sec, in large part because the extruder cannot keep up with thicker layers. I want something that can really MOVE the plastic--perhaps enough to do 250+ mm per second on .5mm layers with a .5mm nozzle. It needs to have the heating capability and the motor power to handle this.
I want something ready to make a bracket so I can bolt on and go. Any recommendations?
It obviously is your first rodeo. Will your mill control extruder temps? 3d print Gcode isn't very much like any other mill gcode.tenaja wrote:Thanks for the "reality check" on the nozzle/height, but I just threw out a few numbers trying to get the point across that I'm not interested in a hand-sized part taking several hours to print, the way most hobby-speed extruders do.
This is not my first rodeo, and I'm not using a router; my mill can handle g-code just like any other mill, and I can add a few axes for the extruders. I'm just trying to find high speed extruders that will do a good job of pumping out plastic but can still be set up to put down a .15mm outer perimeter looking decent.
You are funny. I usually use industrial temperature controllers for these applications. I have made hot air blowers, retrofitted multiple injection molding machines, and designed balloon blowers from scratch. That is just a partial list of temperature controlled projects, and all of those had to be calibrated. Fitting an extruder and heatbed to an existing mill is nothing.jfkansas wrote: It obviously is your first rodeo. Will your mill control extruder temps? 3d print Gcode isn't very much like any other mill gcode.