Is there a safety mechanism on Mega V XL to prevent damage

[cb942]

I've experienced a jam on a cnc with the bit dropping to the edge of stock and router was unable to move.  Made some noise before I could stop it and I'm sure it slipped a cog or so on the belt.  With a solid drive on the Mega V what prevents serious damage in case of immovable object?  Shear pin/slip clutch?  or?  I'm looking to upgrade from what I have but this concerns me.

[oldtech]

I have a power route that I upgraded to Linuxcnc in part for just that reason. At least both soft and hard limits work. It has now been three years and so far the machine only has a few cuts in the table. For extra safety I could add additional limit switches, but so far I have not seen a reason to do that.

Linuxcnc provides quite a few checks. I just got one that warned that the z depth was negative (I had the origin set to the top and I set it up for lower right hand stock).

I am not sure where you would add a shear pin or slip clutch to prevent damage.

[bLouChip]

Clearly the Mega V series drive train is powerful and non-slip if all parts are tightened properly, and thus there is cause for concern that damage could occur if the axes are driven into the end stops. However, I can attest after having a couple of those "end stop crash" events that the machine can sustain it without damage; basically the motors consume the steps thrown at them from the control box drivers without harm, but in doing so they let you know you screwed up, it's quite a racketing noise.  I certainly wouldn't want to do this often.  I find that using grbl config soft limits will do the job in preventing this in most cases; leaving the cases where the "end stop crashes" occur to be those where the axes are not where grbl believes they are .  Lessons learned, re-home if you believe one or more of the axes has skipped some steps for any reason.