Well that didn't end well...

[Dangle_kt]

the small sample program was what I edited, it was set to run above the work peice to demo the machine to me when I bought it. I just set it to run the same path but 1mm into the material. stupid mistake to have not thought it through more. I have since learned that plunge rate needs to be a lot slower than feed rate.

My max spindle speed is 5000, and I'm not sure what it can rapid at

[Chaz]

the small sample program was what I edited, it was set to run above the work peice to demo the machine to me when I bought it. I just set it to run the same path but 1mm into the material. stupid mistake to have not thought it through more. I have since learned that plunge rate needs to be a lot slower than feed rate.

My max spindle speed is 5000, and I'm not sure what it can rapid at

Yep, a lot slower plunge. Keep in mind, some end mills cannot mill straight down if they are not cutting in the centre. Its better to helix or profile in at an angle anyways.

What is the HP rating of the spindle?

[Dangle_kt]

its a novamill so it only has 0.5hp I think

[JAZZCNC]

If at all possible avoid Plunging into material. Or like mentioned helical into it. Or at very least peck into it using peck drill cycle.

However the most likely reason your tool broke was too low feedrate and too low Spindle RPM for aluminium. 1000rpm isn't anywhere near fast enough unless was using really large cutter.
Can't really give you any figures to use because we don't have enough info regards cutter used but I'm pretty sure you'll need nearly all your 5000rpm if trying to cut aluminium.