Adjustable Trident Internal Spool Holder

I used Logan’s horseshoe spool holder but kept running into problems with the wheels breaking and/or falling off the frame.  I modified Logan’s wheel bolts to make them tighter and that helped a bit, but the wheels would eventually break along a layer line.   I found Dr. Mursey’s mod and gave it a try but found the frame just a bit too tight to work with a 200mm spool.  I looked at Logan’s original Fusion file and decided to remix from scratch, making it fully parameterized.  I also remixed elcrni’s wheels so that both sides are identical.  As I was doing the frame and wheel’s for a 200mm spool it occurred that me that I could make the design adjustable to accommodate 200mm and 195mm spools(such as West3D’s Ambrosia or Flashforge).  What I made could probably adapt to spools from 190mm to 210mm.  With a different frame it could handle even smaller spools.

New Improved Wheels!

Although the wheels based off of the Dr Mursey remix are better than the original Logan design, I still have problems with the hubs breaking under compression.  This version will hopefully address that.  Instead of 8mm ID F88 bearings this version uses 5mm ID F695-2RS bearings which are common in the Voron design.  Instead of plastic hubs I use M4x10mm binding screw posts that are common in furniture.  They have a 5mm outer post and a 4mm inner screw.  Unfortunately the 5mm post is just a little too short so I included a 3mm spacer to help the wheel to frame clearance.  You could get a M5 x 3mm aluminum spacer if you prefer. 

It might be possible to use a regular 5mm screw or even a 8mm screw with F88 bearings but the wheel slots will have to be enlarged. 

I left the original wheels in the Fusion file for reference as well as the original model files.  I strongly recommend moving to the F695-based wheels.

The wheels are attached to the frame with the M5 binding post.  I found that you really only need to adjust one of the wheels.  Set the other two roughly in the middle of their slot and use the third wheel to get the correct tension on the spool.  It doesn’t need to be too tight.  Hopefully the pictures help, maybe in a future version I’ll include an assembly in Fusion.

The orientation of the parts is correct for printing.  Print quantities as specified in the file name.  Note that the latest version uses different wheels so you will need to print those.

BOM (F695 Version)

• 9 Voron standard M3x5x4 Brass Heat Inserts  (three per wheel)
• 6 F695-2RS flange bearing
• 9 M3 x 8mm countersunk screws (M3x8 BHCS or SHCS should work also)
• 3 M4x10mm Binding Post Screw (https://www.amazon.com/dp/B0CKSDJ68N)
• (optional) 3 M5 spacer (https://www.amazon.com/dp/B0CRL95WH2)
• 2 M5 T-Nut (regular or Hammerhead)
• 2 M5 x 8 (BHCS or SHCS)

BOM (Original Version):

• 15 Voron standard M3x5x4 Brass Heat Inserts  (three per wheel plus 1 per each axle cap)
• 6 F88ZZ or F688-2RS flange bearing 8 x 16
• 9 M3 x 8mm countersunk screws (M3x8 BHCS or SHCS should work also)
• 3 M3 x 20 SHCS for Axle  (or M3x25 or M3x30 BHCS if using the updated axle caps)
• (optional) M3 washer
• (optional) M3 wing nut or thumb nut if using the updated axle caps
• 2 M5 T-Nut (regular or Hammerhead)
• 2 M5 x 8 (BHCS or SHCS)

Print Settings

• Material: ABS or ASA, I printed with ASA
• Ellis PIF standard profile 
• I lowered the infill to 30 and increased the perimeters to 5 to beef up the wheel mounting slots

I took Logan Fraser's spool holder and recreated it as a fully parameterized design.  As with Dr Mursey's remix I use guides (wheels) from elcrni's model.  I recreated the guides so both sides are the same (you need two of each per wheel).  The latest version is based on F695 bearings and has more durable axles. The biggest change is making the wheels adjustable to accommodate different spool sizes.