I've had two jobs where the router went off program and started plowing through wood along the Y axis. Both times this happened as the router was cutting a curve.
Last night I realized that router wasn't getting extra instructions, or firing erratically. Instead, the X-axis was stalling. Since it was cutting a curve, the stall showed up as a move in the Y axis. After looking around for a bit, it looks like a heat related problem and adding a fan to the setup would help.
I ordered a small 24V fan, and made plans to build a wood box to house the fan and the gShield/Arduino Uno combo.
I was going to wait for the fan to arrive, but then I realized I didn't need to. I already had a very large fan in the room that I could use to cool the gShield. My shopvac. I hooked the shopvac exhaust up so that it would blow over the gShield.
I had no stalls on the next, larger and longer run. I had one problem where it lost some steps on the X-axis, but I'm going to assume for now that's because I had upped the cutting depth to 3mm.
Friday, December 25, 2015
Sunday, December 13, 2015
Successful run
I've been working on a dresser for my daughter, and using the CNC for some of the curves that will go on the dresser's bottom.
Last week I had an unsuccessful run where the CNC router suddenly decided to diverge from the path. I'm not sure if it was a user error or something else; it happened as I was preparing to hand things off to another operator. One of the things that I noticed was that the router had no problems going through the oak, even though it was already about 10mm deep.
But this week I had a successful run. The parameters were: cut depth of 2mm (up from 1mm), feed rate of 197.302 mm/min. The full file is available at http://a360.co/1NOrm5Y.
One of the reason this run was a success was that none of the plunges happened in the wood; they all happened slight off to the side.
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