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General Mach Discussion / pwm mode set up issues
« on: October 01, 2008, 11:11:25 PM »
Hello, I am new to Mach 3 and have a problem. I am trying to use the pwm spindle output and something is not working properly. I need to ultimately get a 0-10v signal to my motor drive, and have purchased a board from Baldor to do just this. It accepts 4-20ma and outputs 0-10v.....their part number BC145.
I have set up the spindle config, assigned ports, etc. and I think that part is working. I don't have a way to measure frequency so I'm just using a digital volt meter set on 20ma. With this connected in parallel with one of the leads at it's attachment point on the converter board, I get a reading of .2 - .8. Problem is I get no voltage output from the board. I know it's not advised to check the pwm with a voltmeter, but it's all I've got at the moment and I'm trying to decide if I have some configuration issues in Mach3 or if maybe my board isn't working.....I just got it today from the manufacturer, but it could be defective. Has anyone ever tried to measure this with a voltmeter and did they get similar values, or does it sound way off?
My problem may well be in my configuration but I have tried various settings all day and have had no luck.
Thanks in advance for any suggestions, and if more information is needed to make more sense, please ask!
Jeff
I have set up the spindle config, assigned ports, etc. and I think that part is working. I don't have a way to measure frequency so I'm just using a digital volt meter set on 20ma. With this connected in parallel with one of the leads at it's attachment point on the converter board, I get a reading of .2 - .8. Problem is I get no voltage output from the board. I know it's not advised to check the pwm with a voltmeter, but it's all I've got at the moment and I'm trying to decide if I have some configuration issues in Mach3 or if maybe my board isn't working.....I just got it today from the manufacturer, but it could be defective. Has anyone ever tried to measure this with a voltmeter and did they get similar values, or does it sound way off?
My problem may well be in my configuration but I have tried various settings all day and have had no luck.
Thanks in advance for any suggestions, and if more information is needed to make more sense, please ask!
Jeff