Weight control on the cotton carding machine has been accomplished for long incremental lengths of sliver. The engineering challenge is to shorten this length by the application of modern technology with an understanding of the processes involved. Generally, the sliver mass is monitored by measuring the thickness of compressed sliver as it passes between a set of tongue and grooved rollers or by using a sensor to determine pressure or sound changes at the trumpet that are related to fluctuations in sliver density. Using one of these two methods the speed of the input batt is then regulated at the feed to deliver a more uniform sliver. The draft of the carding machine is about 120 which produces a lag between the sliver that is going through the trumpet and the batt of fibers input at the rear of the card which is being controlled. Other methods and technologies need to be considered for weight control on the cotton card in order to affect shorter lengths thus increasing overall uniformity.