Mach3 Brain: How to Write a Brain to Stop Feed if Spindle Stalls

[@helomynameizearl]

My tooling and I thank you!!! I have been chasing rare intermittent spindle issues (random stopping) but I'm still needing to make parts until I can tear it down to find the issue. I used your information here to stop movement in case of spindle failure.

[@UnorthodoxFabrication]

Man, You are on another level! Thanks for sharing. I cant wait to learn this end of mach 3.

[@jeffweigold1359]

If you have a spindle encoder and program with G95 ipr instead of ipm, the carriage will stop when the spindle stops, only moving when spindle moves.

[@rpicinic]

That was awesome. Thank you for sharing.

[@renyk]

please tell me the name o this plate, i need one. thanks

[@zmajmr]

Hi, I have question why did you select blended feedrate in creating brain, thing is that I do not understand meaning 100% of blended , does that means moving one of existing axis (z or x ) ? Anyway will use your tutorial to make spindle protection because I had few situation where I saw it will be really useful , like drilling and boring deep holes, when built up chips inside of part can stall spindle .

[@ricochetproducts]

good job! thanks for sharing

[@sasasasa711]

Hey Buddy..Can You help me write a screenset for a Tenon and Mortise making CNC? It will be fun,,,!

[@idranktoomuch2]

I have workpieces that vary in z plane and I run the same xy program on them. I have a capacitance sensor that detects if the tool gets too close to the workpiece it is triggered but am having trouble finalizing the brain to adjust the z height a fixed incriment upward. Anyone know a command that would do this? basically, if sensor is triggered while program is running, adjust zheight .25" upward and continue running. thanks!

[@builtrodewreckedit]

That's really cool. Have you tried the brain with that feed hold instead of the estop. I would imagine if the feed stops for a second maybe the spindle rpms would pick back up. That way the program would continue to finish the job. I would think it would work well if the feed rate percentage were turned down untel the spindle rpms went back up also

[@FrancoCNC]

Thanks. I tried feed hold and, for some strange reason, Mach3 gets all messed up when I try to resume the program. The tool paths go crazy. I figured it was safer to do an e-stop and then restart the program.

[@builtrodewreckedit]

oic thanks. I need to go find screen4 and play with it... thanks for showing me i hadn't heard of it befor

[@FrancoCNC]

+builtrodewreckedit Screen4 is free on the Artsoft website.

[@daniba73]

Hello. is it possible to synchronize with the brain the G95 (millimeter feed per revolution) with the rotation of the spindle ??.

[@engomar5530]

Do you do that??

[@daniba73]

Hi i'm italian, use google translate. I'm doing first test with mach3 turn. Do you use G96 constant cutting speed? Because I noticed not good behavior with constant cutting speed G96 with use of G95 (mm / min) Especially in turning face, does not respect F. It works correctly with G97 fixed speeds.

[@bosaru2]

Is there a way to interface it with a feedrate over-ride?

[@FrancoCNC]

Maybe. Since I've first posted this, I've updated the brain to look at the condition of the spindle on LED. The brain only triggers the estop if the spindle is on, the RPM is less than 90% of what is commanded and the axis are moving. This seems to be the winning combination.

[@FedererGuga]

@@FrancoCNC Do you have a .. how to... on this new setup? Thanks!

[@FrancoCNC]

I made a few improvements to the brain. Follow the link to download the brain, screen sets and macros. www.dropbox.com/sh/h97cq08r88uk0t9/AAAuoF4YJNzfvebD8xTxEF3Ha?dl=0 Use the macros (M201 to activate and M200 to deactivate) to control the brain from within a CNC program. This new version of the brain checks the status of the Spindle On LED. If the spindle is not commanded to be on, it won't trigger the e-stop. However, if the spindle is commanded to be on and the brain is activated (either with M201 or by pressing the button), anytime the actual RPM drops below 90% of the commanded RPM while an axis is moving, the e-stop will be triggered.

[@danielkitson6878]

nice brain, my question is when the spindle is not running a cant jog with it turned on ?? plus my spindle is controlled by a vfd so when the program goes for a tool change and the spindle aint runnig it estops before it get to the m3s1100 to start the spindle, as your spindle is manual i can sse how this works well for you, keep up the good work, thanks daniel

[@FrancoCNC]

You are spot on. I have to turn off this feature before I can jog manually. You can probably create a M code to enable and disable this function from your program. I'll have to look into that...

[@danielkitson6878]

I will look at it too and see if I can come up with a way to do this, i was thinking maybe add a turn off command to the homing marco as this is normally the first thing you do.when you turn on a machine and on the wizards screens adding an option to add this brains or not, when you make your g code file ?? What do you think ??, thanks for your rely daniel

[@FrancoCNC]

I just made custom M codes to turn this feature off and on. Create a file called M200.m1s and save it in the MACROS folder under Mach3. The macro will have one line of code: SetUserLED(2000,0) Now you can call M200 to disable the speed fluctuation detection. I also created another file called M201.m1s to turn it on. The macro will have one line of code: SetUserLED(2000,1) I hope this helps.

[@danielkitson6878]

+Franco that's brilliant, I will try it when I get home, thanks daniel

[@BrianFyhnPetersen]

Another option to save your tools and machine, is to wire your VFD in series with the E-stop button. If your VFD unexpectedly stops for ANY reason during an operation, it can be programmed to cut the signal and activate the E-stop. I use it on my mill and it works great.

[@dokasgaspar719]

I Franco,it is possible to have another axis in the Mach3 turn? besides having the x-axis and z-axis have for example the c axis, if we can speak for PM is so mean. thank you

[@FrancoCNC]

I don't think turn can handle more than two axis. But, you can configure a milling profile to handle what you are doing. Just switch over to milling when you need it.

[@zmajmr]

it is possible, i use y axis

[@ProKopen]

Tell me, I have a CNC plasma cutter, I need to turn off the TНС 2 seconds before the end of the cut, can this be done through brains? if so how?

[@RuiSjm]

Before end cut or before turn off plasma?

[@ProKopen]

@@RuiSjm 5 mm before the end of the cut

[@RuiSjm]

@@ProKopen I think is impossible do that

[@ProKopen]

@@RuiSjm Thanks

[@johnpgerrity]

Great video - could you put your camera on a fixed location? I bet a lot more people would watch your videos if it was stable.

[@FrancoCNC]

Yeah...I guess I need to invest in a tripod. Sorry about that.

[@johnpgerrity]

Other than that you have great content - Thanks :)