CNC Shark Forum

Just a thought: I've made clock hands from 1/64, or 1/32 plywood. I purchased it from hobby shops that have model airplane supplies. If necessary, I make a small diameter hub and glue it to a hand.
Bob

Jon You may have a dull bit when: Burn marks are on the wood Discolored bit Fuzzy edges on cuts The cut no longer looks clean The cutting may sound different than when the bit was new Making dust instead of chips Magnified visual inspection of the cutting edge shows a dull bit A bit that is running ...

There are many possible causes: The bit may have come loose. The collet may be not clean. The bit may be extended too far out of the collet. The wood may not be clamped down securely. The bit may be dull. The collet or bit may have lubricant on it, causing the bit to slip. There may be sawdust in th...

Another question: In what place on the bit does it break? The same place?
Bob

I was just thinking...If a collet is damaged internally, it can cause higher pressure on one side of the bit. Causes of damage: a broken bit, normal wear, improperly cleaned collet, improperly cleaned bit, dropped collet, and the list goes on. Also sawdust in the collet can cause uneven clamping pre...

Usually heat is caused if you're not making chips...The feed rate is too slow. If the feed is too slow you're making dust, which does not remove heat. Or, the bit speed is too fast...same result, dust instead of chips. Your boxes don't seem to show burning, so I'm not sure what is causing the bits t...

Tim,
I've never had that problem. My recommendation is to contact Next Wave directly. https://www.nextwavecnc.com/support I have always found them to be very helpful.

Bob

First step: Stop pulling out your hair! It sounds like you have tried some good problem identifying methods so far. Second: Try a different direction of cut. Try less depth of cut per pass. Post your settings. Or, Post your crv file. Or, Post a picture of the defective project. Sometimes it's easier...

My first thought is that if it's been working well for the past 8 years and just broke down, the Porter cable 890 8902 might be a good one to to use as a replacement. Other thoughts: Spindles are really a good way to go and are made for extended run times and are quiet, but you need to add component...

Mark,
I'm not sure if pvc would be strong enough for this project. It seems to be lightweight. Just be careful when trying the feather boards. The cutting board that I used was made from a tougher plastic. Probably HDPE.
Bob