New start

[Nr1madman]

Okey..
Made some changes.
Jazz will get upset because I made several changes at once and should this work I still don't know the fault :)

I looked at all wiring and found some places where I could improve so a little better cable management. Moved my relays with 24v logic further away from 230v and 50v.
Also disconnected and removed vfd control from the bob. Had it connected to on/off relay and 1-10v speed control.

After these changes it's been running 3h without fake e stop.

Read on cncdrive forum about similar problem and it turned out that it was interference from switches that caused it. Strange when the e stop was set to port and pin 0!

If it continues to work for me I need another solution for vfd control! Is rs485 to usb twowire system ok?
But that only let's you control speed and not start/stop from system? Or am I mistaken? :D

Skickat från min SM-G955F via Tapatalk

[Doddy]

Okey..
Read on cncdrive forum about similar problem and it turned out that it was interference from switches that caused it. Strange when the e stop was set to port and pin 0!

If it continues to work for me I need another solution for vfd control! Is rs485 to usb twowire system ok?
But that only let's you control speed and not start/stop from system? Or am I mistaken? :D

You can control the forward/reverse control, as well as spindle speed, over the serial bus - I do that now with Mach3, using the HuanYang controller plugin. Clearly depends somewhat on your controller (being a HuanYang) and the plug-in for UCCNC (I've not tried it, but it seems pretty basic functionality - I've got the code for the LinuxCNC driver and it's just a different control sequence that gets sent).

USB interface?, it's fine using that for a USB->Serial convertor - there's nothing time critical sent over this interface if all you're doing is controlling spindle speed etc (standard chinese AC spindle, etc). Just use a decent twisted-pair cable to connect the interface to the spindle inverter. (also, I can't remember WHAT connector I used - but I found it easier to fit a 2-pin connector into the side-wall of the inverter to allow the modbus interface to be easily made/unmade (my frequent changes to the control box solution made me want some flexibility between modbus and discrete control).

[A_Camera]

If it continues to work for me I need another solution for vfd control! Is rs485 to usb twowire system ok?
But that only let's you control speed and not start/stop from system? Or am I mistaken? :D

Yes, you are mistaken. I don't know which VFD you have, but as far as I know, all VFD which allows RS485 control has at least on/off/forward/reverse/speed commands. I control mine via Modbus protocol and even download some monitoring data.

The USB dongle is fine for Modbus but some models are better than others. I have one like this...



...which I don't use because I wanted Ethernet control, so I bought this one:



Both works reliably, and in fact, you can also buy a WIFI version, which I'd probably go for today, if I not already had this wired one.