Spokane Create Delta Printer

[ABearden]

I seen this on the makerfarm webpage: http://www.makerfarm.com/index.php/hot-e...t-end.html it is the magma All-Metal hotend supposedly regularly $70 on sale for $29 but they only have it in the 3mm filament option.

Trinity Labs (makers of the Magma) are no longer in business, thus the sale. But good find on an all-metal hotend! Unfortunately, the JHead order is already in (should be here next Wednesday).

Tonight went well, Dan and I discussed the frame. We're thinking we'll go with the full 4' rods, with 6" on either end dedicated to mounting them to the platforms. Should give us a nice build envelope, but not allow too much twisting of the frame. Then the real question came up...12" or 18" carriage rods? We've got a couple of design tradeoffs to make. Do we want to be able to make larger pieces? Do we want speed? Do we want accuracy?

18" carriage arms with a 20.75" edge leads to a 14.9" diameter build circle (23.9" max build height, for 4167 cu in total build volume).

12" carriage arms with a 13.5" edge leads to a 9.7" diameter build circle (29" max build height, for 2143 cu in total build volume)

The 12" will move faster and be more accurate than the 18" due to reduced momentum and arm flex. We can get around it with a more complex carriage using 3 or 4 arms per tower instead of the normal 2, but that adds weight which adds to belt stretch (less accuracy) and cost (50 or 100% more rods). Would look pretty cool though.

We all know speed is good, but I guess the real question is how much build width do we want? Wide and tall, or narrower and slightly taller? I don't think height will ever be an issue. I just don't see us needing a 2' tall part any time soon that can't be assembled with additional build techniques.