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S. K. Sinha et al.
1. Electric motor
2. Worm reduction gearbox
3. Specially designed cast iron cam
4. Bearing as a follower
5. Set of presser plate
6. G-shaped electric heater coil
7. Base to hold all the above parts together.
Electric Motor. Electric motor powers both the cam presser mechanism and
conveyor assembly. This type of motor uses electromagnetic induction from the
magnetic field of the stator winding to produce an electric current in the rotor and
hence torque. These are the most common type of AC motor and important in industry
due to their load capacity with single-phase induction motors being used mainly for
smaller loads, like used in house hold appliances, whereas three-phase induction
motors are used more in industrial applications including like compressors, pumps,
conveyor systems, and lifting gear. As our application is household based, we selected
single-phase motor.
Specifications—1.5 HP, 1440 RPM, single phase, flange mounted.
Worm Reduction Gearbox. We needed the minimum rpm to get enough torque
and speed for cam follower and to slow down the conveyors for minimum baking
time of roti. So, we have chosen worm reduction gearbox with 80:1 reduction ratio.
Worm gears are the most minimal sort of framework and give high-proportion speed
decrease. They are regularly the favored sort of gearing framework when space is
constrained and large speed reduction is required. Worm apparatuses can be utilized
to either enormously build torque or extraordinarily diminish speed. They are additionally the smoothest and calmest of the rigging frameworks, as long as they are
appropriately mounted and greased up.
Specially Designed Cast Iron Cam. Maximum distance from the center to
circumference of the cam is 100 mm, and minimum distance from the center to
circumference of the cam is 55 mm.
Set of Presser Plate. Cam follower presser mechanism consists of a stationary presser
plate and a moving presser plate as shown in Fig. Stationary plate is attached to the
welded metal strips of the upper section of main frame structure by bolts. Moving
presser plate has a hinge at the bottom which can be interlocked with the base of
the mechanism. Due to such design, moving plate has only one angular degree of
freedom which helps to press the dough ball sandwiched between the two plates
(Figs. 2 and 3).
Each presser plate is made up of three components:
Cast iron plate with circular slot at the center. Casted out in a unique pattern to
minimize the weight of mechanism with a circular slot for inserting electric G coil.
Electric G coil of 800 w is used to preroast the roti before baking on open flame
through conveyors.
S. K. Sinha et al.
1. Electric motor
2. Worm reduction gearbox
3. Specially designed cast iron cam
4. Bearing as a follower
5. Set of presser plate
6. G-shaped electric heater coil
7. Base to hold all the above parts together.
Electric Motor. Electric motor powers both the cam presser mechanism and
conveyor assembly. This type of motor uses electromagnetic induction from the
magnetic field of the stator winding to produce an electric current in the rotor and
hence torque. These are the most common type of AC motor and important in industry
due to their load capacity with single-phase induction motors being used mainly for
smaller loads, like used in house hold appliances, whereas three-phase induction
motors are used more in industrial applications including like compressors, pumps,
conveyor systems, and lifting gear. As our application is household based, we selected
single-phase motor.
Specifications—1.5 HP, 1440 RPM, single phase, flange mounted.
Worm Reduction Gearbox. We needed the minimum rpm to get enough torque
and speed for cam follower and to slow down the conveyors for minimum baking
time of roti. So, we have chosen worm reduction gearbox with 80:1 reduction ratio.
Worm gears are the most minimal sort of framework and give high-proportion speed
decrease. They are regularly the favored sort of gearing framework when space is
constrained and large speed reduction is required. Worm apparatuses can be utilized
to either enormously build torque or extraordinarily diminish speed. They are additionally the smoothest and calmest of the rigging frameworks, as long as they are
appropriately mounted and greased up.
Specially Designed Cast Iron Cam. Maximum distance from the center to
circumference of the cam is 100 mm, and minimum distance from the center to
circumference of the cam is 55 mm.
Set of Presser Plate. Cam follower presser mechanism consists of a stationary presser
plate and a moving presser plate as shown in Fig. Stationary plate is attached to the
welded metal strips of the upper section of main frame structure by bolts. Moving
presser plate has a hinge at the bottom which can be interlocked with the base of
the mechanism. Due to such design, moving plate has only one angular degree of
freedom which helps to press the dough ball sandwiched between the two plates
(Figs. 2 and 3).
Each presser plate is made up of three components:
Cast iron plate with circular slot at the center. Casted out in a unique pattern to
minimize the weight of mechanism with a circular slot for inserting electric G coil.
Electric G coil of 800 w is used to preroast the roti before baking on open flame
through conveyors.