MwTech Inc
Titanium
- Joined
- Feb 6, 2005
- Location
- Fishersville VA
Customer brought me a machine used in the food industry.
Came to me disassembled, used to it.
Anyway, the machine portions out food and is driven by a servomotor on the gearcase.
Servomotor is used to propel the head and I am sure it it used for portion control, CPU reads the rotations and starts/ stops motor and/or controls other accessories.
Problem: servomotor is bad(customer inflicted) among other things.
OEM wants $5k for servomotor
They want $75.00 for a buna o-ring 170x2.0. to give you an idea of their pricing?!
So............turns out customer doesn't want portion control, they have never used it for portion control
They want the machine to feed continuously, controlled by a foot pedal by a human, simple ON/OFF.
So................I say lose the servo and mate a std motor to gearbox. Add a VFD to control motor speed. Program the ramp-up speed to be easy on startup , use "coast to stop" when pedal is released.
Question: servo is rated at 2.4 KW at 3000rpm-19 amp,
A 3 hp std motor is 2.2kw+- @3450,
close enough to swap???
Realize an adapter will/may be needed between new motor and old gearbox.
Anything I don't know about the differences between servos and std motors? ( in the context of this application)
I am assuming they both have approx the same perfomance?
Thanks
Andy
Came to me disassembled, used to it.
Anyway, the machine portions out food and is driven by a servomotor on the gearcase.
Servomotor is used to propel the head and I am sure it it used for portion control, CPU reads the rotations and starts/ stops motor and/or controls other accessories.
Problem: servomotor is bad(customer inflicted) among other things.
OEM wants $5k for servomotor
They want $75.00 for a buna o-ring 170x2.0. to give you an idea of their pricing?!
So............turns out customer doesn't want portion control, they have never used it for portion control
They want the machine to feed continuously, controlled by a foot pedal by a human, simple ON/OFF.
So................I say lose the servo and mate a std motor to gearbox. Add a VFD to control motor speed. Program the ramp-up speed to be easy on startup , use "coast to stop" when pedal is released.
Question: servo is rated at 2.4 KW at 3000rpm-19 amp,
A 3 hp std motor is 2.2kw+- @3450,
close enough to swap???
Realize an adapter will/may be needed between new motor and old gearbox.
Anything I don't know about the differences between servos and std motors? ( in the context of this application)
I am assuming they both have approx the same perfomance?
Thanks
Andy