After a long laundry list of health issues I will spare everyone the details of, I have returned. Just here to share a Project I’ve been working on for the Longmill Mk2.
After the Auto dust shoe project I was wondering, What else can be driven with a stepper with the SLB Controller?
After what felt like a $2-3K shopping spree, I later ended up with a 100mm Diameter BT30 3KW atc spindle w/ 10x ER32-70mm tool holders and set forth on designing a Concept for a BT30 tool magazine.
I wanted it to be mostly 3d printed for ease of proto-typing (because I the rest of the bits and bobs were expensive enough already) and so that maybe other people can try and replicate for their longmill once its ready. Good thing I can print rather quickly thanks to owning multiple printers…
This one has been in the works for about a year so far and Im getting close to a first proto type. Here is the progress on the model so far:

I will keep posting about this in free time so thank you if anyone took the time to view this and I hope everyone has a great long memorial day weekend!
Update #1:
I have a completed 15 slot BT30-ER32 ATC magazine printed out. Total print time for this Mag was around 1 day per segment (seen in Black CF-PETG). With 4 printers running all at once what would have taken 5 days only took 2 days. The linkages (seen in Red PETG) took around 1.5 hrs for a single unit. The prints for the Black CF-PETG from Sunlu are printed with 20% infill and will be strong enough for this use case. The Prints in Red PETG are printed solid 100% infill.
For the bottom part that accepts the NEMA-23 motor and Linear Guide rod mounting Beam this was a semi structural part so I printed each segment in black CF-PETG with 75% infill and again the Red PETG linkages were 100% infill.
Next update will hopefully be soon as Im waiting on an amazon order for the T8 leadscrew, Linear guide bearings and Rods, and I should have the rest of the parts printed by the end of this week. Stay tuned and keep Machining everyone!






