Does anyone know how the E-stop button with the AltMill can/will interact with a spindle over modbus/rs485? Will it issue any sort of command?
Or, can the SLB be configured to output a logic signal that an e-stop would kill? (Better said, a default high signal, that is then low if the e-stop is pressed).
Hi Greg,
This is what sienci has to say on estop.
It seems there is some signaling going on, not sure how yet. Maybe the schematic can help you there?
Here’s the estop page.
For what I can tell, the estop triggers a signal low on a line called HALT-ext triggering D32 to light up. HALT-ext gets fed into the mcu via a convertor as a line called HALT < speculation > wich uses it to switch enable lines < /speculation >
I have no spindle so don’t know what it needs to function but there seems no enable line at the RS485 connector. Only 5v gnd and tx/rx lines.
Maybe you can figure it out with the schematics at your disposal?
Thanks! The link you provided seems to suggest it will kill the spindle, but it’s unclear if that supports spindles via RS485 as well (and not just a spindle controlled with PWM going to 0)
Each SLB comes with an E-stop and pre-made wiring to keep you safe out-of-the-box when cutting. When pressed, the E-stop is designed to cut all power to your CNCs stepper motors and also send a signal back to the MCU to disable all other accessories that your SLB controls. This includes turning off the spindle, IOT Relay, and anything else that’s triggered by M3/4 and M7/8 commands.
Hopefully when Sienci is back in the office next week they could comment. I feel like RS485 is superior for talking to the VFD, so hopefully it issues either a spindle stop command at the minimum, or (if supported) an e-stop condition to the VFD.
Nudge to Sienci staff maybe for more info?
@greg5 You may want to open a support ticket with Sienci.
I heard back - e-stop will send a spindle stop command over rs485/modbus to the VFD.