Gantry Router

[stevep]

Hi Silyavski, I have already built my machine, and have been wondering how to safe guard the failure of one side of the gantry to move, on my machine they are lead screws with stepper motor and drivers on each side of the gantry axis,
so the problem is how to save damaging the machine if one of the stepper motors, stepper units or even a slipping feed nut coupling etc failed
Stevep

[Clive S]

Hi Silyavski, I have already built my machine, and have been wondering how to safe guard the failure of one side of the gantry to move, on my machine they are lead screws with stepper motor and drivers on each side of the gantry axis,
so the problem is how to save damaging the machine if one of the stepper motors, stepper units or even a slipping feed nut coupling etc failed
Stevep

As have been stated modern digital drives have an alarm output which is then connected to the BOB or motion controller etc and that will then disable all drives and thus the motors. ..Clive

[Boyan Silyavski]

i would rather change the 2 drives to Leadshine AM882.

Otherwise you will have to stay and watch the machine at all times. Ok, sorry, i am joking.

the only other method that i am aware of is using steel cord and some pulleys

[Boyan Silyavski]

here is the original solution https://cockrum.net/cnc.html

[stevep]

Thanks for the info.....the cross linked cable is interesting
Stevep

[JAZZCNC]

Thanks for the info.....the cross linked cable is interesting
Stevep

It also doesn't work very well so don't waste your time and effort.!!

This can be done without changing drives using an arduino and tacho's or encoders on each screw then compare readings and if large difference then send a signal to the input on controller to e-stop.

But for the cost and complexity you may has well just buy AM882 drives that have stall detect and will most likely be much better than the drives you have already.