Well as the title suggests I'm trying to achieve speed control for the spindle through Mach4.
I'm using a Teco VFD part number is something like JNEV-202-H1. Operators manual can be found here...
https://www.tecowestinghouse.com/wp-...ing_manual.pdf
I have laptop running Mach4 with an ESS controller.
I think I have 90% of it sorted through reading other post and info I have found on the net but the one thing that eludes me is what to do about a common between the ESS and the VFD. The VFD currently uses a com, AIN and +10v pins connected to a pot for speed control or more precisely control the frequency of the output.
The ESS has a pins designated for FWD, REV and PWM. I'm reading 0 - 5.1v off the ESS PWM pin depending on what speed I punch in on Mach4, So I have that side of it sorted.
My problem is I don't want to connect the ground of my ESS to the com pin on the VFD, Something deep within my subconscious is screaming "Don't do it" or maybe it was the internet saying that, who knows. Anyway how can I complete the circuit otherwise? I'm not even sure I can send a 0-5v digital signal to and analog input? Ether way I'll need some sort of common ground from the Ethernet Smoothstepper FWD, REV and PWM pins to the digital (FWD,REV) and analog (PWM) inputs of the VFD.
Now before anyone states the obvious, "The vfd needs 10v and you only have 5v". What I'm hoping to do is use the Parameter F17 AIN gain (%) and increase it to 200% in order to reach full speed. I'm not sure it this will work or not but I'd like to try it before I buy or try to create a BOB that's capable of turning my 0-5v into 0-10v.
Any advise would be greatly appreciated.
Cheers,
J