Howdy all! I built a Primo over the summer, and have been struggling to get it working for actually cutting wood. Cutting in styrofoam works great, but I’m getting huge jerks forward on the x-axis when actually cutting into wood (and I keep destroying bits about 30 minutes into the projects in wood). Can anybody help diagnose my problem? (video in dropbox link below, hopefully I have done this correctly).
For reference, that’s “soft” maple, and I’m running at 10,000 RPM, 60 mm/min, feed-per-tooth 0.003, depth of cut 2mm with an upcut-2-flute-1/8" cheapo bit off Ali (I thought maybe the bits might be the problem but I think it’s got to be the machine with that wobble/jerk). I added that fan on the bit this morning as I thought not clearing chips was the problem, but that thing is clearing chips great and still having the problem! (you can see yesterday’ attempt that broke the bit on the second contour pass to the left in the video). For the build I
got the full kit from the store including motors/belts/wiring/hardware, and it’s running on a Jackpot with the stock firmware it came with, and movement seems excellent otherwise. Thanks for the help!
With your router off and out of the material, grab the router and see how much play you have. Given the range of movement, I’m guessing the bearings are not fully engaged on the tubing, and therefore there is a lot of slop.
If there is slop, you will need to adjust it out. You should also examine all of your core clamps. Cracked core clamps can be the source of the slop.
If you didn’t buy the materials for your build from V1, make sure you did not buy steel reinforced belts. The steel in the belts will breask going around the tight corners resulting in uneven streatching and therefore uneven movement.
I’m not sure any of my suggestions matches perfectly to what I see in the video, but we can start by eliminating some possible causes.
WHOA, I didn’t even see that! You guys have eagle eyes! Looks like I need to scare up a kg of filament! I bet that’ll help. It cracked right where I’ve tightened that core clamp that used to have a ton of play on it that I had ton of trouble with. Thanks for helping!
I am! 60 mm/min in Fusion. I have progressively gone down & down & more down as I’ve failed. Maybe fixing stuff as other posters have mentioned will let me go faster!
