BLUF: Can a rotary motor kill a FBLI-B-LV4 contoler card?
Background: i had aquired a rotary decice with a ring chuck. My current rotary was a 3 jaw chuck.
I went to replace the chucks but found that the shafts we different sizes.
Option 1. Drill out the ring chuck to accept the larger shaft.
Option 2. Order the correct device. Promptly discarded this option cus im that guy.
Option 3. Swap the armature between the cases.
Yes i went with option three. They were the same frame size so what could be the problem?
Problem 1 (of many im sure folks can list without thinking hard. ) the ring motor was a 3 phase motor 3 wires . Original rotary was single phase.4 wires
No problem i will resolder with the new wire and add the black wire into the card on the back of the case windings of the two phase motor.
Shoved in the new armature, hooked up the device to my laser fired up lightburn enabled rotary. Did a test and it spun the chuck as expected. Once. Then LightBurn could nologer see the laser.
Disconnect the rotary set everything back to normal. No luck. Attempted to reinstall drivers and lightburn. Just in case. But no luck.
So i figure i blew up the card.
I will be honest i havent checked to see if i just screwed up the power supply. Will check that.
Has anyone else ran into something like this?
Im ok being the only one in the kiddie pool just thought i would ask.
Picture of the single phase solder connection. For clarity..
If I understand correctly, you disassembled both motors and installed the 3-phase rotor into the 2-phase armature.
Those are not interchangeable, because the two motors have different magnetic pole layouts. A 3-phase rotor will not work in a 2-phase armature and vice versa, regardless of the wiring.
It’s not clear what you rewired, but most likely it shorted one of the driver outputs to either the power supply or ground. Although the drivers generally have short-circuit protection, they’re not bombproof. In particular, mis-wiring the stepper power supply to a logic I/O pin or power rail will kill the whole board stone cold dead.
At least in the Old Days, stepper rotors were magnetized after installation. Removing them from the armature demagnetizes them enough that, while they may rotate (in the proper armature), their weaker magnetic field means the motor torque will be a mere shadow of its former self. If that’s still true, both motors are now crippled and will never work well regardless of the driver.
Remember: Experience is what you get when you don’t get what you want.
I have a t-shirt in that style, so, yeah, I feel your pain.
