Dgarratt: Updated by push_wiki.py

2026-04-01T09:57:57Z

Updated by push_wiki.py

← Older revision		Revision as of 11:57, 1 April 2026
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	[[~~Category~~: ~~Commander4j~~]]		The Weight Checks Module is a quality control system within Commander4j for capturing, analysing, and reporting on product weight measurements during production. It monitors individual sample weights against statutory and internal tolerances, calculates pass/fail results automatically, and integrates with electronic scales via serial port for automated weight capture.
	[[~~file~~:~~WeightChecks1.png\|600px~~]]
			The module is governed by European average weight legislation, which uses two tolerance thresholds — T1 and T2 — to determine whether a sample is within acceptable limits.

			== Overview ==

			During production, an operator places products on a connected scale. The system reads the weight automatically (or allows manual entry), collects a configured number of samples, and calculates the sample mean and standard deviation in real time. If individual weights or statistical results fall outside defined tolerances, the system flags T1 (warning) or T2 (critical) failures. All results are stored and are available for historical reporting and trend analysis.

			== Concepts ==

			=== Nominal Weight and Tolerances ===

			Each product has a '''nominal weight''' — the declared weight stated on the packaging. The Weight Checks Module uses a '''Tolerable Negative Error (TNE)''' to define how far below the nominal weight an individual unit may legally fall.

			Two thresholds are derived from the TNE:

			{\| class="wikitable"
			\|-
			! Threshold !! Meaning !! Typical value
			\|-
			\| '''T1''' \|\| Warning — weight is approaching the limit \|\| Typically 80% of TNE below nominal
			\|-
			\| '''T2''' \|\| Critical — weight has breached the statutory limit \|\| 100% of TNE below nominal
			\|}

			TNE values by nominal weight are defined in the '''Tolerable Negative Errors''' table and are used automatically when a sample is taken.

			=== Product Groups ===

			Materials are assigned to '''Product Groups''', which define the nominal weight, tare weight (the weight of the empty container), and tolerance specifications for that group. When an operator selects a process order, the system looks up the material's product group and pre-fills the relevant weight specifications automatically.

			=== Sample Points ===

			A '''Sample Point''' represents a physical location in the facility where weight checks are performed — for example, a point at the end of a production line, or in the quality bay. Each sample point is associated with a required resource (production line).

			=== Workstations ===

			A '''Workstation''' links a specific computer to a sample point and a scale device. When the Weight Capture screen opens, the system identifies the workstation automatically by matching the computer's name. This determines which sample point and scale to use without requiring the operator to configure anything.

			== Configuration ==

			Before the module can be used, the following must be set up through the desktop administration screens:

			# '''Scales''' — define each scale device (make, model, serial port settings)
			# '''Sample Points''' — define the measurement locations
			# '''Workstations''' — link each computer to a sample point and a scale
			# '''Product Groups''' — define nominal weights, tare weights, and tolerance specs
			# '''Tolerable Negative Errors''' — define T1 and T2 thresholds for each nominal weight

			=== Supported Scales ===

			The module communicates with electronic scales via a serial port (RS-232/USB serial). The following scale makes are supported:

			{\| class="wikitable"
			\|-
			! Make !! Reset command !! Response format
			\|-
			\| Mettler Toledo \|\| @ \|\| <code>S S 123.45g</code>
			\|-
			\| Avery W-Tronix \|\| C \|\| <code> 1G 123.45g</code>
			\|}

			Serial port parameters (baud rate, data bits, stop bits, parity, flow control) are configured per scale in the Scale Admin screen.

			=== Sample Size ===

			The default number of individual measurements taken per sample session is controlled by a system key. Individual workstations can override this if a different sample size is required at a specific location.

			== Screens ==

			{\| class="wikitable"
			\|-
			! Screen !! Purpose
			\|-
			\| [[Weight Checks Data Capture]] \|\| Primary screen for operators to record weight samples
			\|-
			\| [[Weight Check Reports]] \|\| Query and report on historical weight sample data
			\|-
			\| Scale Admin \|\| Create and manage scale device records
			\|-
			\| Workstation Admin \|\| Create and manage workstation assignments
			\|-
			\| Sample Point Admin \|\| Create and manage sample point locations
			\|-
			\| Product Group Admin \|\| Define weight specifications by product group
			\|-
			\| Tolerable Negative Errors \|\| Define T1/T2 thresholds by nominal weight
			\|-
			\| Container Codes Admin \|\| Define packaging types
			\|}

			== Database Tables ==

			{\| class="wikitable"
			\|-
			! Table !! Contents
			\|-
			\| APP_WEIGHT_SAMPLE_HEADER \|\| One record per sampling session (header information, statistics, pass/fail counts)
			\|-
			\| APP_WEIGHT_SAMPLE_DETAIL \|\| One record per individual weight measurement
			\|-
			\| APP_WEIGHT_TNE \|\| Tolerable Negative Error values by nominal weight
			\|-
			\| APP_WEIGHT_SCALE \|\| Scale device configuration
			\|-
			\| APP_WEIGHT_WORKSTATION \|\| Workstation-to-scale-and-sample-point assignments
			\|-
			\| APP_WEIGHT_SAMPLE_POINT \|\| Sample point locations
			\|-
			\| APP_PRODUCT_GROUP \|\| Product group weight specifications
			\|-
			\| APP_WEIGHT_CONTAINER_CODE \|\| Packaging type codes
			\|}

			See also: [[Weight Checks Data Capture]], [[Weight Check Reports]], [[Tolerable Negative Errors]], [[Process Orders]]

			[[Category:Commander4j]]

Dgarratt at 09:42, 25 August 2024

2024-08-25T09:42:38Z

← Older revision		Revision as of 11:42, 25 August 2024
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			[[Category: Commander4j]]
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Dgarratt at 12:06, 21 August 2024

2024-08-21T12:06:22Z

← Older revision		Revision as of 14:06, 21 August 2024
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Dgarratt at 12:04, 21 August 2024

2024-08-21T12:04:41Z

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Dgarratt at 12:03, 21 August 2024

2024-08-21T12:03:56Z

← Older revision		Revision as of 14:03, 21 August 2024
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Dgarratt at 19:02, 19 August 2024

2024-08-19T19:02:34Z

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	[[file:WeightChecks3.png\|~~px600~~]]		[[file:WeightChecks3.png\| 600px]]

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	[[file:WeightChecks5.png\|~~px600~~]]		[[file:WeightChecks5.png\| 600px]]

Dgarratt: Created page with " px600 px600 px600 px600 px600"

2024-08-19T19:02:03Z

Created page with " px600 px600 px600 px600 px600"

New page

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← Older revision		Revision as of 21:02, 19 August 2024
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	[[file:WeightChecks1.png\|~~px600~~]]		[[file:WeightChecks1.png\|600px]]

	[[file:WeightChecks2.png\|~~px600~~]]		[[file:WeightChecks2.png\| 600px]]

	[[file:WeightChecks3.png\|~~px600~~]]		[[file:WeightChecks3.png\| 600px]]

	[[file:WeightChecks4.png\|~~px600~~]]		[[file:WeightChecks4.png\| 600px]]

	[[file:WeightChecks5.png\|~~px600~~]]		[[file:WeightChecks5.png\| 600px]]

Weight Checks Module - Revision history

Dgarratt: Updated by push_wiki.py

Dgarratt at 09:42, 25 August 2024

Dgarratt at 12:06, 21 August 2024

Dgarratt at 12:04, 21 August 2024

Dgarratt at 12:03, 21 August 2024

Dgarratt at 19:02, 19 August 2024

Dgarratt: Created page with " px600 px600 px600 px600 px600"