12" Axial Ventilation Fan: Difference between revisions
m (→Modbus code reference: changed address) |
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from multitimer import MultiTimer | from multitimer import MultiTimer | ||
instr = minimalmodbus.Instrument("/dev/ttyS2", 1) | instr = minimalmodbus.Instrument("/dev/ttyS2", 1) | ||
instr.baudrate = 38400 | instr.serial.baudrate = 38400 | ||
runcmd = 0 | runcmd = 0 | ||
Revision as of 05:04, 11 June 2021
 Location: On the Ceiling towards the back |
| Fan |
|---|
|
Brand: Unknown |
Background
The 12" Axial Ventilation ceiling fan of questionable pedigree is in a sheet metal and fiberboard enclosure of questionable pedigree.
In the time when droplets of water fall from the sky, the fan enclosure leaks water into the interior of the makerspace. Nobody knows why.
The ceiling fan is placed on a ceiling perforation that was made before the industrial unit was rented by the makerspace. The perforation was originally for an 18" turbine ventilator.
Underneath the ceiling perforation, a plenum box of similarly questionable pedigree was constructed out of paper-backed foam board found in the dumpster.
Current Usage
Please plug in the ceiling fan when the laser cutter is running. Use the drive control panel located inside the grey drive enclosure to start the fan or stop the fan.
As of 2021-04, the fan was upgraded to a VFD controlled 3 phase motor. It is possible to use the fan by pressing the buttons on the VFD. The VFD is Invertek model ODE-3-110043-1012.
Modbus code reference
This code can be used to run the VFD while the Haldor Fan Controller is under development, but the drive is currently configured to be controlled via the control panel.
You may gain access to the controller by contacting User:BLu.
import minimalmodbus
from multitimer import MultiTimer
instr = minimalmodbus.Instrument("/dev/ttyS2", 1)
instr.serial.baudrate = 38400
runcmd = 0
# these registers can be found in the invertek manual
CONTROL_WORD = 0
FREQ_SETPOINT = 1
DRIVE_STATUS = 5
# these control word bits can be found in the invertek manual
ON = 1
FAULT_RESET = 4
def renew():
global runcmd
instr.write_register(CONTROL_WORD, runcmd)
timer = MultiTimer(interval = 1, function = renew)
timer.start()
instr.read_register(DRIVE_STATUS)
instr.write_register(FREQ_SETPOINT, 300)
runcmd = ON
Future Usage
The ceiling fan is planned to also vent from the 3d printers when the ABS fume extraction apparati are installed. Please wait warmly.
The fan will be controllable via the screen on HAL in the near future. For the moment, the fan is controllable through the VFD display aperture which will be covered in the future.
Picture Gallery
TODO: Ceiling View
Fan Belt
Single Phase Motor
The fan!
