Not wanting to teach my grandmother to suck eggs, - but you should Never leave a router cutting wood unattended. If the spindle manages to pick up on a piece wood and rotates with that piece on the cutter, when making the next Z down move can cause a fire in no time due to the friction of the rotating wood rubbing on the job. Matters can be even worse with a vacuum bed as the vacuum can cause the sacrificial board to smoulder, and perhaps burst into flames hours later when the machine has been abandoned for the night. I think you have indeed had a lucky escape!!!G.
Last edited by GEOFFREY; 24-01-2014 at 07:51 PM. Reason: spelling - again!
Just looked at the photos again, and it looks like the spindle itself has blackened? Is that just soot? I hope it's not got hot enough to anneal the collet taper, as that would clearly be a big problem.
On reflection I think your right and it's worth a look.
You mention it getting hot enough to anneal the collet taper, forgive my ignorance but why would this be an issue?
Last edited by Jonathan; 24-01-2014 at 10:03 PM. Reason: excessive punctuation
Jim I'd strip it just to be safe better spending 60mins and £1 worth of grease than 2 weeks waiting and £150 for new spindle or even £80 on bearings.
Like Jon says there's nothing to it other than plucking up the balls to do it.!!
Wouldn't worry to much about the annealing has while it could have I doubt it did because it didn't fire up and the amount of heat required to anneal would have set the wood on fire.!!
Last edited by Jonathan; 24-01-2014 at 10:14 PM.
Back to the Potential fire and E-stop then I've seen Larger machines use a Rope E-stop with rope that runs around the machine that can be pulled from anywhere on the machine and activate the E-stop.!!
Oh by the way I'd already seen these pics fews weeks ago and asked Jim if he'd please post because it's important to show just how powerful and potentially dangerous even small machines can be.
I see it often people saying " Not botherd about E-stop because the steppers will stall or spindle will stall " or " I'll just switch it off at the wall" but they don't realise the full power even medium torque steppers can have when attached to ballscrews or how like a startled rabbit your froze on the spot for what seems like minutes but is nano seconds and by the time your brains recovered from the shock and told your arm to do something it's all just too late.!!
It's not until you actualy have some thing like this happen or see stationery 12mm cutter punch a hole thru 30mm of bed like it was punching butter do you stand back and say "OH SHITE".!!
So thanks for sharing Jim and Boy's he deserves some Thank's so get clicking. .
Last edited by JAZZCNC; 24-01-2014 at 11:02 PM.
Last edited by cncJim; 25-01-2014 at 07:00 PM.
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