John Pfleger wrote: > Long time reader, first time poster. Welcome!
> I have been running a 3 axis desktop mill using Animatics Smart Motors > (emulating stepper motors) for 12 months now. But as the smart motors are > only emulating steppers, I have been thinking about converting them to > operate as servo motors. They have inbuilt rotary encoders that can be > connected to the out pins and velocity/direction can be supplied to an input > as a 5V analogue signal. > My current plan is use a Mesa 7I43-U-4 to read the encoders and supply the > PWM signals (convert the PWM into analogue signal). Is this a > feasible/sensible way to go? > > I must admit that I am struggling to understand exactly how to configure EMC2 > to achieve this. Am I correct in assuming that the PID will output a > velocity/direction signal to the motor until the encoder counts = the new > positional counts. Also, the velocity will decrease as it gets closer to the > desired position? Hi there, what you propose sounds perfectly reasonable. The hm2-servo sample config included with emc2 controls a 3-axis servo machine using a 7i43 board, that would be a good place for you to start. I dont know if the raw PWM signal from the 7i43 will provide a sufficiently clean "analog" signal to the motor amps, you may need a DAC board like the Mesa 7i33 or similar to produce a really smooth control voltage. > This email (including any files) transmitted with it is confidential and > should be read only by those persons or entities to whom it is addressed. If > you are not the intended recipient, you are notified that any use, > dissemination, distribution or copying of this message or data is prohibited. > > If you have received this message in error, please notify us immediately by > way of reply. Please also destroy and delete the message from your computer. > Any unauthorised form of reproduction of this message is strictly prohibited > and all attached information and data remains the property of Daniels. > > It is the duty of the recipient to virus-scan and otherwise test the > information provided before loading onto any computer system. > > Daniels and any member of the Daniels group does not warrant that the > information is free of a virus or any other defect or error. > > Any views expressed in this message are those of the individual sender, > except where the sender specifically states them to be the views of Daniels. This email list is archived in a couple of public places, you may want to rethink your "terms of use" for posts to public mailing lists. -- Sebastian Kuzminsky Dualism? Sure. Brain and Mind are different. "Brain" is a noun. "Mind" is a verb - it's what a properly functioning Brain does. -- DHuff ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
