To get the four bolts to hold the extruder together I had to use a total of 7 washers. Two each on the top bolts and bottom left. The bottom right only needed one washer. It might have been fine without it, but I figured it couldn’t hurt. Until the bolt length / spacer size (the effector mount) gets rectified, I’d recommend putting two washers on each bolt for clarity and simplicity.
Note on: “Note that the stepper motor connector must face up.” I took this to mean that the cable connector for the stepper needs to be oriented up. This doesn’t match the pictures in Cindy’s build notes and will direct the stepper motor wires into the patch of the printer’s arms. I think the stepper should be mounted such that the connectors face left or right (personally orienting them on the right for easier cable management.
Note: in the E3D instructions it mentions a “spacer” between the motor and the extruder. This spacer is built into the SLS printed effector (with the 6 ball ends for the arms).
Whatever’s clever, but if you follow E3D’s instructions then the wires from the thermistor and heat cartridges will be on the other side. This should be noted one way or the other (so simply say that it doesn’t matter). I was scratching my head wondering how I messed it up, tried to reinstall the heatbreak/hotend and then removed and reinstalled the cartridges.
This needs to be updated as the printers are no longer shipping with the Tusk part cooling part. I’ll try to give notes as I have time.
If someone could make a video of this process, it would be super helpful. I couldn’t figure out how to get the belts properly pretensioned and still get it put together. I currently have the tensioners tightened to the max and the Easy Tensioner App is telling me that I’m getting about 30 Hz instead of the recommended. I’m sure I did something wrong (first complete build), but I can’t figure it out.
Note on the belt tensioners: The hole is tapered so the top is slightly smaller than the bottom. This allows the wedges to use friction to hold the belts. Also, if there’s a way to install them on the carriage without having to remove them later to get the belts on, I don’t know and couldn’t figure out how.
I read this and the original several times and kept looking at the printed wedges wondering, “where the #$%# do these go?” You end up putting one in each of the square holes (there one in each SLS printed tensioner [with the wedge on it] and one on the bottom of the carriage.
Note: This is the correct “up” position. I put on the carriages upside down and had the pleasure of having to remove the top and endstops to fix.
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