CNC Ethercat conversion of a HM32 milling machine using linuxcnc.

This is a way over the top almost finished upgrade to a HM32 mill that I purchased from a guy who had converted it to Mach3 in a very dodgy way years ago. It used the original leadscrews and rubber hose and hose clamps for misalignment couplings. I sold the Mach3 PC and controller and single phase motor. I replaced the motor that only ran in one direction with a 3 phase one and wired it up to a 5.5 kW 3 phase VFD. I tore out the leadscrews and replaced them with ballscrews. For drives, I used the Rtellignet Ethercat ECT86 closed loop stepper drivers which can accept 80 volts AC. The motors were replaced with NEMA34 closed loop ones from rtelligent. The NEMA24 motor I purchased did not like the bigger drives. They need the ECT60 drive but I wanted to use a 65 volt AC toroid which the ECT60 did not support. So I replaced the NEMA 24 with an open loop NEMA34 I had spare. I ran up the ethercat config pretty easily on a PC at home but had a lot of trouble because I used Debian Bullseye that the etherlabmaster does not support. Just as I was about to reformat the HDD back to Debian Buster, Linuxcnc user Michel Winja from the Netherlands built a deb file for me that got me out of trouble once I set up the linker include paths and worked out a way to load the ethercat driver on startup. I tried hard to use the built in CIA402 homing feature of these drives but was unable to get it working. I think homing.c needs modifications to get this working. So I reverted to normal linuxcnc homing which is waiting for a couple of prox sensors to complete. This build also incorporates a safety relay. The HMI was plasma cut and houses a 15" touch screen and an Odroid H2+ PC that unfortunately is no longer made. There is a bit more wiring to do and then I'll be tackling the spindle which needs to be controlled through the VFD as I don't have anything on the ethercat bus to do it differently. So stay tuned as I finish this off.

الفئة