Weigh Feeder
Dear Mr.Tan,
Please read the book "Weighing & proportioning" by COLLINS. We will get good idea.
Regards.
A.Banerjee ■
Weigh Belt Feeder Operation
Tan,
The most common type of weigh belt feeders have very simple theoretical modes of operation, but can seem complex when implemented.
The function of a typical weigh belt feeder is to speed up and slow down the belt to compensate for bulk density changes in a meterial and maintain a user-defined target feedrate called "setpoint".
To do this a weight sensing device and belt movement sensor send information to a microprocessor-based controller.
As a material (powder, granule, pellet, etc.) passes across a defined section of the belt conveyor, the signal from the weight sensing device is used to develop a belt load value in weight/length units. This would be pounds/foot or kilograms/meter.
At the same time as the belt load is developed, pulses from an encoder (normally mounted on a pulley) are used to determine how far the belt has moved in a period of time. The "belt speed" is in length/time units, such as feet/minute or meters/minute. The belt speed is multiplied times the belt load to arrive at the current feedrate of the material.
The current feedrate is then compared to the desired feedrate (setpoint) and the belt speed is increased or decreased based on the error. The result is minimum error between the setpoint and the actual feedrate. The weigh belt feeder also supplies a total of material fed through the feeder.
There are many algorithms and parameters associated with weigh belt feeders, as well as other control schemes such as constant belt speed with control of a variable pre-feed device.
Merrick does have an executable (.exe) program which is a simulation for our weigh belt feeder controller. It allows a PC user to simulate belt speed and belt load and enter various parameters for a belt feeder control scheme. I would be glad to provide a a copy by e-mail if you desire. ■
Re: Belt Weighfeeder Simulation Software
Dear Mr. Tan,
Mr. Shagndink has explained the working of belt weight feeder in detail.
The objective of weigh feeder is to have discharge of material at selected capacity from control panel. There are different variants of weigh feeder to achieve this objective. The particular type depends upon the material, capacity, discharge accuracy, space / length and budget. The best course for you is to discuss the matter with manufacturer / designer of weigh feeder. The weigh feeder is a system itself and its proper explanation is difficult in the forum.
The variants are, weigh feeder without pre-feeder, weigh feeder with pre-feeder and simple belt feeder cum conveyor with weight scale beyond skirt zone (the belt on conventional troughing idler would be comparatively wider for this type of arrangement).
The balancing of flow at different points in the system i.e. in system before weigh feeder, at weigh feeder and in system after weigh feeder is equally important to design equipment / system.
Regards,
Ishwar G Mulani.
Author of Book : Engineering Science and Application Design for Belt Conveyors.
Advisor / Consultant for Bulk Material Handling System & Issues.
Email : parimul@pn2.vsnl.net.in
Tel.: 0091 (0)20 25882916 ■
Re: Weigh Belt Feeder Operation
Originally posted by shagndink
Tan,
The most common type of weigh belt feeders have very simple theoretical modes of operation, but can seem complex when implemented.
The function of a typical weigh belt feeder is to speed up and slow down the belt to compensate for bulk density changes in a meterial and maintain a user-defined target feedrate called "setpoint".
To do this a weight sensing device and belt movement sensor send information to a microprocessor-based controller.
As a material (powder, granule, pellet, etc.) passes across a defined section of the belt conveyor, the signal from the weight sensing device is used to develop a belt load value in weight/length units. This would be pounds/foot or kilograms/meter.
At the same time as the belt load is developed, pulses from an encoder (normally mounted on a pulley) are used to determine how far the belt has moved in a period of time. The "belt speed" is in length/time units, such as feet/minute or meters/minute. The belt speed is multiplied times the belt load to arrive at the current feedrate of the material.
The current feedrate is then compared to the desired feedrate (setpoint) and the belt speed is increased or decreased based on the error. The result is minimum error between the setpoint and the actual feedrate. The weigh belt feeder also supplies a total of material fed through the feeder.
There are many algorithms and parameters associated with weigh belt feeders, as well as other control schemes such as constant belt speed with control of a variable pre-feed device.
Merrick does have an executable (.exe) program which is a simulation for our weigh belt feeder controller. It allows a PC user to simulate belt speed and belt load and enter various parameters for a belt feeder control scheme. I would be glad to provide a a copy by e-mail if you desire.
■
Re: Weigh Belt Feeder Operation
Dear sir,
I have the same curiosity abount the way, wayfeeders work,
I would be highly grateful if you could send me the WeighFeeder simulation program to this address:
dakheli54@yahoo.com ■
Weigh Belt Feeder Operation
Dear Sirs,
I do my project about weighfeeder and i had problem,
Weight sensing device value in weight/length units, length value from what?
and can anyone send me weighfeeder simulation software.
Thanks,
acheundip@yahoo.com ■
Re: Belt Weighfeeder Simulation Software
i had the same problem too. from the manual it said that to measure the centerline between 0 to +1 idlers and divide the your known test weight with that distance between centerline of idlers.
by the way, can you please also send me that simulation software on belt weighing. fritz.amellabon@rrpi.com.ph or fritzdam51711@yahoo.com ■
Re: Belt Weighfeeder Simulation Software
i had the same problem too. from the manual it said that to measure the centerline between 0 to +1 idlers and divide the your known test weight with that distance between centerline of idlers.
by the way, can you please also send me that simulation software on belt weighing. fritz.amellabon@rrpi.com.ph or fritzdam51711@yahoo.com ■
Rq Feeder Software
please send me weighfeeder software too to my email.
prinyas@lamax.co.th ■
Re: Belt Weighfeeder Simulation Software
Originally Posted by shagndink
The most common type of weigh belt feeders have very simple theoretical modes of operation, but can seem complex when implemented.
The function of a typical weigh belt feeder is to speed up and slow down the belt to compensate for bulk density changes in a meterial and maintain a user-defined target feedrate called "setpoint".
To do this a weight sensing device and belt movement sensor send information to a microprocessor-based controller.
As a material (powder, granule, pellet, etc.) passes across a defined section of the belt conveyor, the signal from the weight sensing device is used to develop a belt load value in weight/length units. This would be pounds/foot or kilograms/meter.
At the same time as the belt load is developed, pulses from an encoder (normally mounted on a pulley) are used to determine how far the belt has moved in a period of time. The "belt speed" is in length/time units, such as feet/minute or meters/minute. The belt speed is multiplied times the belt load to arrive at the current feedrate of the material.
The current feedrate is then compared to the desired feedrate (setpoint) and the belt speed is increased or decreased based on the error. The result is minimum error between the setpoint and the actual feedrate. The weigh belt feeder also supplies a total of material fed through the feeder.
There are many algorithms and parameters associated with weigh belt feeders, as well as other control schemes such as constant belt speed with control of a variable pre-feed device.
Merrick does have an executable (.exe) program which is a simulation for our weigh belt feeder controller. It allows a PC user to simulate belt speed and belt load and enter various parameters for a belt feeder control scheme. I would be glad to provide a a copy by e-mail if you desire.
Sir, i would be thankfull if you provide the .exe to me at atliboy@gmail.com. thanks ■
Re: Belt Weighfeeder Simulation Software
Dear Sir,
According to my knowledge,Wiegh feeders are mainly used in packaging machines.
We also make vibratory feeders. ■
Re: Belt Weighfeeder Simulation Software
Originally Posted by VindhyawasiniNo no, there are many applications nothing to do with packaging. ■
Re: Belt Weighfeeder Simulation Software
Dear Mr Shagndink,
I would be highly thankful to you if you could send me the WeighFeeder simulation program.
I really nead it. Hope that you would help me!
Thank you so much
My mail is Bluepaperdc@yahoo.com
I am from Vietnam. ■
Belt Weighfeeder Simulation Software
The most common type of weigh belt feeders have very simple theoretical modes of operation, but can seem complex when implemented. A weight sensing device and belt movement sensor send information to a microprocessor-based controller. There are many algorithms and parameters associated with weigh belt feeders, as well as other control schemes such as constant belt speed with control of a variable pre-feed device. ■
Weighfeeder Simulation
Dear Mr Shagndink,
I would be highly thankful to you if you could send me the WeighFeeder simulation program.
I am a student from Vietnam and I am doing a research on weighfeeder from PFister.
Thank you so much
My mail is nguyen.kirk.die@gmail.com ■
Re: Belt Weighfeeder Simulation Software
Dear friend
thanks for meaningful data you show please could u send me the simulation software coz i need to learn mor about belt weighfeeders ■
New Person Want To Learn
Dear sir,
can you send to me the software too.
to my email.
ahmad.safwan@annjoosteel.com.my ■
Re: Belt Weighfeeder Simulation Software
I am also having difficulty in our weighfeeders. Can you email weighfeeder simulation program.
da8388@yahoo.com ■
Untitled
please send me weighfeeder software too to my email.
thanks,
hendraftje2000@yahoo.com ■
Belt weighfeeder simulation software
Dear Sirs,
I want to know how a belt weighfeeder operates. I read the manual but I do not understand clearly.
Do you have a belt weighfeeder simulation software?
Please help me!
Tan ■