{"id":31255,"date":"2026-10-21T23:45:32","date_gmt":"2026-10-21T15:45:32","guid":{"rendered":"https:\/\/lintyco.nl\/checkweigher-combineren\/"},"modified":"2026-10-21T23:45:32","modified_gmt":"2026-10-21T15:45:32","slug":"checkweigher-combineren","status":"publish","type":"post","link":"https:\/\/lintyco.nl\/en\/checkweigher-combineren\/","title":{"rendered":"Combining a checkweigher with a VFFS: Closing the Quality Chain"},"content":{"rendered":"

A vertical form, fill, and seal machine<\/a> It fills bags at a steady pace, but it relies on its own dosage: the machine itself does not check what the screw or checkweigher dispenses. The checkweigher does that\u2014every bag, on the conveyor belt, immediately after sealing. Combined with a metal detector, this ensures the entire quality chain from dosage to approved bag.<\/p>\n

What the checkweigher measures<\/h2>\n

Each bag passes over the weighing belt at a rate of 30 to 60 bags per minute; the load cell reads the weight in milligrams within a window of approximately 200 ms. From the series of readings, the control system calculates the average, the spread, and the percentage outside tolerance. You set this tolerance around the target net weight: for example, 500 g with a tolerance range of minus 2 to plus 4 g, depending on what is permitted by law and your customer.<\/p>\n

Feedback to the dosing system<\/h2>\n

The strength lies not in measuring but in making adjustments: the checkweigher reports the running average to the dosing control system, and the screw adjusts the number of revolutions per cycle\u2014the hybrid approach takes the equation out of the picture screw feeder or multihead weigher<\/a>. This ensures that the average remains at the target weight even if the product's density varies due to humidity or batch differences. Without this link, your operator would have to calibrate manually, and that would happen only as often as work permits.<\/p>\n

Metal Detection and X-ray Screening<\/h2>\n

Weighing is followed by detection: a metal detector scans the bag for ferrous and non-ferrous particles starting at approximately 1.5 mm for steel and 2.5 mm for non-ferrous metals in wet products; an X-ray scanner also detects stone, glass, and dense bone. Which of the two you choose depends on your product and target market\u2014retail chains often require detection. Both devices belong in the category auxiliary equipment<\/a> around the core machine.<\/p>\n

Discharge and Logging<\/h2>\n

A bag that\u2019s out of tolerance isn\u2019t allowed to pass: a pusher or flip-over device removes it from the line into a sealed bin. The logging system does the rest\u2014every weighing is time-stamped, and every rejection is logged with a reason. After an hour of production, you\u2019ll see whether the rejections represent normal variation or a trend indicating wear and tear\u2014a sign that you\u2019ll also notice in the maintenance schedule<\/a> finds.<\/p>\n

\n\n\n\n\n\n\n\n\n
Station<\/th>\nMeasure or do<\/th>\nResponse in Case of Deviation<\/th>\n<\/tr>\n<\/thead>\n
VFFS with dosing unit<\/td>\nprepare a dose<\/td>\n\u2014<\/td>\n<\/tr>\n
Checkweigher<\/td>\nweigh each bag<\/td>\nadjust, drain<\/td>\n<\/tr>\n
Metal Detector<\/td>\nmetal scanning<\/td>\nRemove, Block batch<\/td>\n<\/tr>\n
Coder<\/td>\ndate and time<\/td>\ntraceability<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

Frequently Asked Questions<\/h2>\n

Q: Does every bag have to be weighed?<\/strong><\/p>\n

No, random sampling is also acceptable\u2014but 100% weighing is the standard as soon as the line allows for it. Random sampling only reveals a trend after dozens of bags; inline weighing detects the deviation in the bag that\u2019s still there.<\/p>\n

Q: How much does a checkweigher cost per Tempo?<\/strong><\/p>\n

Practically nothing: the weighing conveyor runs at the same speed as the production line and adds milliseconds per bag. The real limitation is synchronization\u2014at 120 bags per minute, the control system requires tight synchronization with the VFFS, which you specify when placing the order, just as with instant coffee packaging machine<\/a>-projects are common.<\/p>\n

Q: Can the checkweigher be integrated into an existing production line?<\/strong><\/p>\n

Yes, provided there is sufficient cable length and an available control connection. Have the supplier specify the communication between the checkweigher and the dosing control system before placing the order\u2014the integration is the project; the devices are the components.<\/p>\n

Related pages<\/h2>\n

vertical form, fill, and seal machine<\/a> | auxiliary equipment<\/a> | screw feeder or multihead weigher<\/a> | maintenance of a packaging machine<\/a> | instant coffee packaging machine<\/a><\/p>\n

\n

Request a technical proposal<\/a> Please specify the product, bag size, and desired output.<\/p>","protected":false},"excerpt":{"rendered":"

The dose produced by the machine is only reliable if it is also measured. This guide explains how a checkweigher weighs each bag after the VFFS, feeds the deviation back to the dosing system, and\u2014together with the metal detector\u2014closes the quality chain, using the setpoints and rejection logic specific to a production line.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"","_seopress_titles_desc":"Checkweigher combineren met een VFFS: 100% weging, bijsturing van de schroefdoseur en metaaldetectie in \u00e9\u00e9n lijn \u2014 zo sluit u de kwaliteitsketen.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","footnotes":""},"categories":[1],"tags":[243,244,245],"class_list":["post-31255","post","type-post","status-publish","format-standard","hentry","category-blog","tag-checkweigher","tag-kwaliteitscontrole","tag-metaaldetector"],"_links":{"self":[{"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/posts\/31255","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/comments?post=31255"}],"version-history":[{"count":0,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/posts\/31255\/revisions"}],"wp:attachment":[{"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/media?parent=31255"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/categories?post=31255"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/tags?post=31255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}