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Author Topic: Problem with % SRO Mach3  (Read 156 times)

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Problem with % SRO Mach3
« on: October 29, 2020, 08:04:37 AM »
Hello good day, I wanted to make a question about my WMD45 milling machine converted to CNC.
It has CSMIO IP / M controller board with closed loop nema 34 motors and I use mach3.
I am doing the installation of a variable frequency drive to be able to control the speed of the spindle motor (4 poles, 380V, 1500 rpm, 1.5 hp).
I already did the installation according to the diagram provided by CSLABS, until then I had no problems. The problem I have is that when varying the% SRO in Mach3, the revolutions goes from 1% to 94% (when reaching 94 the rpm is 1500), from 95 to 100% there are no changes.
This makes for example take the RPM to 50% instead of going to 750rpm it goes 790. It is as if the last 5% did not count.
Something similar happened to someone or know how to configure it?

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Re: Problem with % SRO Mach3
« Reply #1 on: October 30, 2020, 04:13:02 AM »
i assume you are using a analog Output for Speed control.

you can go to Plugin Control -> CSMIO and then to Analog IO

here you can watch the voltage of your Analog Output and check the value.
anything is possible, just try to do it.
if you find some mistakes, in my bad bavarian english,they are yours.
Re: Problem with % SRO Mach3
« Reply #2 on: October 30, 2020, 07:11:53 AM »
Hello, yes, I use an analog output.
I Check the Analog IO in the plugin
Analog output voltage does not reach full when SRO is 94%, but the motor goes to 100%

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Re: Problem with % SRO Mach3
« Reply #3 on: October 30, 2020, 08:59:52 AM »
then the Problem is on your frequency converter.
anything is possible, just try to do it.
if you find some mistakes, in my bad bavarian english,they are yours.