Machsupport Forum

Third party software and hardware support forums. => Modbus => Topic started by: fish.norling@gmail.om on December 24, 2023, 12:29:47 PM

Title: Mach 4, Pokeys and a VFD - spindle control issue
Post by: fish.norling@gmail.om on December 24, 2023, 12:29:47 PM

Hi All,

I am having trouble with spindle control using CNC57 pokeys, Mach 4 and an Allen Bradley VFD. 

Here is what I get;

Call for 500 RPM, get 665
Call for 1000 RPM get 783
Call for 1500 RPM get 905

Any ideas?

Thanks,
Dave

Title: Re: Mach 4, Pokeys and a VFD - spindle control issue
Post by: Graham Waterworth on December 24, 2023, 02:44:18 PM

Have you set the speed range in the pulley screen, mach uses this to work out the 0-10v range.

Title: Re: Mach 4, Pokeys and a VFD - spindle control issue
Post by: fish.norling@gmail.om on December 24, 2023, 08:25:19 PM

I have not but wondered about it as I have seen the screen in Mach 4,  Thank you!  Are you aware of any print material to guide me in this process?

Title: Re: Mach 4, Pokeys and a VFD - spindle control issue
Post by: Graham Waterworth on December 25, 2023, 07:44:50 AM

Its just a case of selecting the pulley and entering the 0 for min speed and enter what ever you max is for the spindle, if you check the Help menu you can open the documents