Do you have a diagram how your speed controller is connected to your tinyG and how both are connected to respective power supplies.
Pretty sure that’s the same controller I’m using.
@donkjr I will see if I can draw a diagram and post it. Interestingly if I don’t use the PWM mode of the controller and “switch pins” to manual mode I can easily adjust the motor without issue. However when I use PWM mode the power supply “shuts down” or goes into overload protection and drops all output to 0VDC. The only way to reset the power supply is to cycle the mains connection.
Even more interesting observation: On initial start up of the controller and PS if the last time I ran it and tingyG was set to a low speed value such as S6000 I have no problems. If however on initial startup if I use a higher speed value such as S10000 the power supply shuts down. I can go from S6000 to S10000 no problems but I can’t start with a higher value!
Very weird… it’s as if the power supply does not like the high current load at startup.
@Rob_Mitchell1 by manual mode you mean set the jumper to allow Pot control?
When you are in manual:
…do you have the same power supply connected as when in PWM control?
… is the PWM connected?
… is the tinyG powered on?
@donkjr Yes, manual mode = setting the jumper to allow for the controllers onboard POT control.
Yes, when in POT control mode (manual mode) I have the same power supply connected.
TinyG is always powered on by another power supply.
@Rob_Mitchell1 try this:
…Disconnect the PWM signal but not its ground from the spindle controller
…Turn the POT full on
…Turn on the Spindle power
…Turn on the tinyG power and assert the PWM ( I know its not connected :))
Does it still fail if so where in the sequence.
@Rob_Mitchell1 try reducing the speed of the spindle ‘S840’ for example. I found a similar problem and reduced the speed to a maximum limit for it to work correctly
@Kevin_Worsfold If I start initially with a lower speed such as S6000 I can get the motor to spin. However if I start with a higher speed setting initially such as S9000 the power supply shuts down (no output DC power) and a red light appears inside the power supply which normally shows a green light (internally) when working. It appears as though the power supply is in overload protection mode.
@donkjr Did as you suggested. The failure occurs only when in PWM mode and initial speed is high such as S9000. It appears as though the power supply goes into over load protection mode. If I control the motor using PWM contoller in “manual” mode with the onboard pot there are no issues with the power supply failing and I turn the pot all the way to maximum speed (~11900RPM).
This speed controller is earthed by being bolted to a grounded backplane in the control cabinet. This is not double insulated and also needs GFCI and current limiting protection upstream as a MINIMUM safety requirement. Think safety because these DIY machines contain lethal energy.
@Peter_Spiess yes
Exactly same as I need for my spindle motor