LinuxCNC hardware.
14 Jul 2020 00:33 - 14 Jul 2020 00:36 #174556
by Storen
Replied by Storen on topic LinuxCNC hardware.
Today I exchanged several emails with the DMM tech support. Here is what I learned:
As we thought the RS-232 connector on the DYN2 drive is for gathering the encoder information, configuring the drive, and controlling the motor. They use their own software (Windows only) for that. It could be used as a simple controller for testing and experimenting. Unfortunately, the RS-232 connector cannot be used by LinuxCNC directly. The DYN2 drive is designed to function with a minim input from the user. Setting the HOME in the drive is very easy. Once the HOME location is set the drive will automatically move the motor there every time the drive is turned ON. Basically, when you turn ON the machine both axises will move to HOME without any homing commands from the controller. The Drive doesn't offer any manual input for that. I guess this is good enough for many applications, but I find it dangerous for a lathe. If the drives are powered OFF when the cutting tool is close to the part, the automatic homing from this position may damage the tool and the part.
Fortunately, DMM offers Absolute Homing Input on their larger, high voltage drive DYN4. It seems this would work fine with LinuxCNC and it turned out to be quite simple.
As we thought the RS-232 connector on the DYN2 drive is for gathering the encoder information, configuring the drive, and controlling the motor. They use their own software (Windows only) for that. It could be used as a simple controller for testing and experimenting. Unfortunately, the RS-232 connector cannot be used by LinuxCNC directly. The DYN2 drive is designed to function with a minim input from the user. Setting the HOME in the drive is very easy. Once the HOME location is set the drive will automatically move the motor there every time the drive is turned ON. Basically, when you turn ON the machine both axises will move to HOME without any homing commands from the controller. The Drive doesn't offer any manual input for that. I guess this is good enough for many applications, but I find it dangerous for a lathe. If the drives are powered OFF when the cutting tool is close to the part, the automatic homing from this position may damage the tool and the part.
Fortunately, DMM offers Absolute Homing Input on their larger, high voltage drive DYN4. It seems this would work fine with LinuxCNC and it turned out to be quite simple.
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07 Jan 2022 19:58 #231053
by Lcvette
Replied by Lcvette on topic LinuxCNC hardware.
This is fantastic!!!Today I exchanged several emails with the DMM tech support. Here is what I learned:
As we thought the RS-232 connector on the DYN2 drive is for gathering the encoder information, configuring the drive, and controlling the motor. They use their own software (Windows only) for that. It could be used as a simple controller for testing and experimenting. Unfortunately, the RS-232 connector cannot be used by LinuxCNC directly. The DYN2 drive is designed to function with a minim input from the user. Setting the HOME in the drive is very easy. Once the HOME location is set the drive will automatically move the motor there every time the drive is turned ON. Basically, when you turn ON the machine both axises will move to HOME without any homing commands from the controller. The Drive doesn't offer any manual input for that. I guess this is good enough for many applications, but I find it dangerous for a lathe. If the drives are powered OFF when the cutting tool is close to the part, the automatic homing from this position may damage the tool and the part.
Fortunately, DMM offers Absolute Homing Input on their larger, high voltage drive DYN4. It seems this would work fine with LinuxCNC and it turned out to be quite simple.
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