I have a load cell with a HX711 connection everything work fine, not i want to upgrade my project to create a balance, i put a large plat board over the load cell, when i move the weight over the plate board the value of the weight is changing constantly can someone help me i'll send you some attachement with the load cell and the plate board.
file_one : the loadcell + plate board
file_two : the plate board + weight on a position x he gave me weight = 0.39 kg
file_three : the plate board + weight on another position x he gave me weight = 0.22 kg
what i want is a solution for this issue, so when i move the weight over the board whatever the position it supposed to give me the same result.
The load cell is a block of metal with a hole in the middle part. Fixate one end on the table (for example) and the other end on the plate that will hold the weights.
pylon:
The load cell is a block of metal with a hole in the middle part. Fixate one end on the table (for example) and the other end on the plate that will hold the weights.
Do you know the level principle? The value you read is "generated" by bowing the load cell. If you increase the level to do so by placing the weight on the far end of the plate the bowing is a bit more and you get a bigger value. You can either compensate that mechanically (quite complicated) or use multiple load cells and add the values up.
pylon:
...by placing the weight on the far end of the plate the bowing is a bit more and you get a bigger value. You can either compensate that mechanically (quite complicated) or use multiple load cells and add the values up.
There are single load cells that are capable of dealing with this issue without mechanical systems or multiple load cells.
They are designed to support a "tray" and can accommodate loads not placed directly on the tip of the load cell.
They are usually called "platform" or "single point" load cells.
For example, in Omega's LCAE series, their 20 kg cell's maximum platform size is 300 mm x 300 mm.
What is the specified maximum size of platform for that load cell? How big is your platform?
And when you said "I have a load cell with a HX711 connection everything work fine" - what did you mean? Give some examples of results without the board...actual weight vs measured weight over the intended weight range.
Also, please learn how to insert images in your posts - see first post here: Website and Forum - Arduino Forum Then go back and fix your post (#4) with the Dropbox images - some of us can't see those due to internet security restrictions.
