{"id":16922,"date":"2026-06-09T15:36:43","date_gmt":"2026-06-09T07:36:43","guid":{"rendered":"https:\/\/www.fhopepack.com\/zh\/?p=16922"},"modified":"2026-06-09T15:46:48","modified_gmt":"2026-06-09T07:46:48","slug":"steel-tube-bundling-and-strapping-line-online-commissioning-showcase","status":"publish","type":"post","link":"https:\/\/www.fhopepack.com\/zh\/steel-tube-bundling-and-strapping-line-online-commissioning-showcase\/","title":{"rendered":"Steel tube bundling and strapping line online commissioning showcase"},"content":{"rendered":"<h2>\ud83d\udee0\ufe0f Working Principle<\/h2>\n<iframe width=\"1391\" height=\"788\" src=\"https:\/\/www.youtube.com\/embed\/6AaBhbmk7lg?list=PLAkNl2G4zKB6DF2B9YCbfDaslZ34OLgVe\" title=\"Steel tube bundle stacking and strapping packing line\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<p><strong>The <a href=\"https:\/\/www.fhopepack.com\/Automatic-Steel-Tube-Packing-Line\/\">steel tube bundling and strapping line<\/a> uses a chain conveyor with nylon blocks spaced at 200\u202fmm (large) and 50\u202fmm (small) to align round or square tubes, then a magnetic pickup and strapping head form uniform bundles under PLC\u2011controlled sensor feedback.<\/strong> The large blocks create a cradle for round tubes; the small blocks between them act as anti\u2011roll separators. If block spacing deviates beyond the vendor\u2011recommended \u00b10.5\u202fmm tolerance, tube misalignment causes counting errors or jams during bundling\u202f<sup id=\"fnref1:1\"><a href=\"#fn%3A1\" class=\"footnote-ref\">1<\/a><\/sup>. The PLC synchronizes feeding, counting, and strapping using inductive proximity sensors (4\u202fmm sensing distance) and a configurable dwell time.<\/p>\n<h2>\ud83c\udfd7\ufe0f Parameter Breakdown<\/h2>\n<p><img decoding=\"async\" src=\"\/zh\/wp-content\/uploads\/2026\/06\/steel-tube-bundling-strapping-line1.webp\" alt=\"steel tube bundling &amp; strapping line\" \/><\/p>\n<p><strong>The critical parameters controlling bundle quality are conveyor block pitch, counting interval, servo position offsets, and layer count settings\u2014each must be tuned to match tube diameter and line speed according to the commissioning record\u202f<sup id=\"fnref2:1\"><a href=\"#fn%3A1\" class=\"footnote-ref\">1<\/a><\/sup>.<\/strong> All changes outside vendor\u2011defined limits require PLC code modification by a qualified technician.<\/p>\n<table>\n<thead>\n<tr>\n<th>Parameter<\/th>\n<th>Value \/ Range<\/th>\n<th>Tolerance \/ Variation<\/th>\n<th>Condition \/ Source<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Large nylon block pitch<\/td>\n<td>200\u202fmm (typical)<\/td>\n<td>\u00b10.5\u202fmm (vendor\u2011recommended; verify on site)<\/td>\n<td>Verified during mechanical alignment<\/td>\n<\/tr>\n<tr>\n<td>Small nylon block pitch<\/td>\n<td>50\u202fmm (typical)<\/td>\n<td>\u00b10.5\u202fmm (vendor\u2011recommended)<\/td>\n<td>Prevents tube rolling between large blocks<\/td>\n<\/tr>\n<tr>\n<td>Counting operation interval<\/td>\n<td>\u2265\u202f3\u20134\u202fseconds<\/td>\n<td>Hard minimum; no tolerance permitted<\/td>\n<td>Minimum pause to avoid false counts<\/td>\n<\/tr>\n<tr>\n<td>Conveyor chain speed<\/td>\n<td>65\u202fm\/min (from upstream flying saw)<\/td>\n<td>\u00b15\u202fm\/min safe range<\/td>\n<td>Used for speed\u2011match logic in PLC<\/td>\n<\/tr>\n<tr>\n<td>Layer count (example)<\/td>\n<td>8 layers<\/td>\n<td>Must match actual stack height<\/td>\n<td>Configurable via HMI<\/td>\n<\/tr>\n<tr>\n<td>Compensation parameter (length offset)<\/td>\n<td>Initial 50, adjusted to 51<\/td>\n<td>\u00b11 unit per calibration step<\/td>\n<td>Fine\u2011tune when measured length shows 1\u202fmm deviation<\/td>\n<\/tr>\n<tr>\n<td>Servo position &amp; speed<\/td>\n<td>Adjustable via HMI<\/td>\n<td>N\/A<\/td>\n<td>Under &#8220;Square tube mode&#8221; or &#8220;Round tube mode&#8221; interface<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Key Point:<\/strong> The counting delay (3\u20134\u202fs) is the most commonly mis\u2011set parameter. Operators often try to speed up the cycle by reducing this delay, which causes the magnetic pickup to miss its home position (see Counter\u2011Intuitive Insights).<\/p>\n<h2>\ud83d\udcc8 Operating Envelope &amp; Limits<\/h2>\n<p><strong>The line operates reliably only within a restricted window: block alignment tolerance \u2264\u00b10.5\u202fmm, conveyor speed 50\u201370\u202fm\/min, and counting dwell \u2265\u202f3\u202fs.<\/strong> Exceeding these limits triggers three documented failure modes from the commissioning record\u202f<sup id=\"fnref3:1\"><a href=\"#fn%3A1\" class=\"footnote-ref\">1<\/a><\/sup>:<\/p>\n<ul>\n<li>\n<p><strong>Failure 1: Magnetic pickup fails to return home<\/strong> \u2013 Occurs when counting interval &lt;\u202f3\u202fs (e.g., trying to feed 10 layers for an 8\u2011layer bundle). The PLC receives more counts than physical layers, causing the magnet to remain energized after the last layer.<\/p>\n<\/li>\n<li>\n<p><strong>Failure 2: Length measurement offset<\/strong> \u2013 If the compensation parameter is changed by more than \u00b11 step per calibration, the servo offset drift accumulates. Maximum safe adjustment: \u00b13 units per calibration cycle.<\/p>\n<\/li>\n<li>\n<p><strong>Failure 3: Double tube feed \/ stacking<\/strong> \u2013 Happens when downstream conveyor stop timing mismatches actual line speed. Safe flying saw speed range: 55\u201370\u202fm\/min. Outside this range, the PLC timing logic must be rewritten by a technician.<\/p>\n<\/li>\n<\/ul>\n<p><strong>Key Point:<\/strong> The system is not \u201cplug\u2011and\u2011play\u201d \u2013 every parameter change outside vendor\u2011defined limits requires a program code modification. Never adjust core servo gain or counting threshold without supplier approval.<\/p>\n<p><img decoding=\"async\" src=\"\/zh\/wp-content\/uploads\/2026\/06\/steel-tube-bundling-strapping-line3.webp\" alt=\"steel tube bundling &amp; strapping line\" \/><\/p>\n<h2>\ud83d\udee1\ufe0f Counter\u2011Intuitive Insights<\/h2>\n<p><strong>Slowing down the test cycle improves reliability\u2014a 3\u2011second counting pause prevents the magnetic pickup from missing its home position, opposite to operator intuition that faster cycles increase throughput.<\/strong> In the commissioning record\u202f<sup id=\"fnref4:1\"><a href=\"#fn%3A1\" class=\"footnote-ref\">1<\/a><\/sup>, operators who accelerated simulation (counting every 1\u20132\u202fs) caused the PLC to lost synchronization between actual layer count and preset value. The magnet stayed on, leaving an incomplete bundle and requiring emergency stop.<\/p>\n<p>The root cause: the magnetic pickup de\u2011energizes only after receiving a \u201clayer complete\u201d signal. At intervals below 3\u202fs, the PLC\u2019s internal counter exceeds the physical layer count before the magnet releases. The 3\u20134\u202fs dwell gives demagnetization enough time to stabilize before the next cycle.<\/p>\n<p><strong>Another counter\u2011intuitive fix:<\/strong> When bundle length reads 401\u202fmm instead of target 400\u202fmm, increase the compensation parameter by <strong>only 1 unit<\/strong> (e.g., 50\u202f\u2192\u202f51). Jumping +2 or +3 overshoots and causes under\u2011length bundles. Always use 1\u2011unit steps with re\u2011measure after each adjustment.<\/p>\n<h2>\u2699\ufe0f Specification Table<\/h2>\n<table>\n<thead>\n<tr>\n<th>Specification<\/th>\n<th>Value<\/th>\n<th>Notes<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Tube diameter range (round)<\/td>\n<td>20\u201380\u202fmm<\/td>\n<td>Estimated from block pitch; <strong>confirm with supplier<\/strong> and verify on site<\/td>\n<\/tr>\n<tr>\n<td>Tube profile (square)<\/td>\n<td>20\u00d720 \u2013 60\u00d760\u202fmm<\/td>\n<td>Supported in &#8220;Square tube mode&#8221;<\/td>\n<\/tr>\n<tr>\n<td>Maximum bundle layers<\/td>\n<td>8 layers (typical)<\/td>\n<td>Configurable via HMI<\/td>\n<\/tr>\n<tr>\n<td>Maximum bundle weight<\/td>\n<td>1000\u202fkg<\/td>\n<td>Estimated; depends on strapping head rating\u2014verify with supplier<\/td>\n<\/tr>\n<tr>\n<td>Conveyor speed<\/td>\n<td>0\u201370\u202fm\/min<\/td>\n<td>PLC\u2011controlled; safe range 50\u201370\u202fm\/min<\/td>\n<\/tr>\n<tr>\n<td>Counting sensor type<\/td>\n<td>Inductive proximity<\/td>\n<td>NPN\/PNP, 4\u202fmm sensing distance<\/td>\n<\/tr>\n<tr>\n<td>Magnetic pickup voltage<\/td>\n<td>24\u202fV DC<\/td>\n<td>Standard industrial<\/td>\n<\/tr>\n<tr>\n<td>Strapping tension<\/td>\n<td>200\u2013500\u202fN<\/td>\n<td>Adjustable via hydraulic pressure valve<\/td>\n<\/tr>\n<tr>\n<td>Control system<\/td>\n<td>PLC\u202f+\u202fHMI<\/td>\n<td>Bilingual (English\/Chinese) interface<\/td>\n<\/tr>\n<tr>\n<td>Power supply<\/td>\n<td>380\u202fV \/ 50\u202fHz \/ 3\u2011phase<\/td>\n<td>Check local voltage before connection<\/td>\n<\/tr>\n<tr>\n<td>Air consumption<\/td>\n<td>10\u202fL\/min @ 6\u202fbar<\/td>\n<td>For pneumatic pushers (if equipped)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Key Point:<\/strong> Before first power\u2011on, perform the five\u2011step commission check: (1) confirm wiring, (2) power on, (3) check PLC inputs by triggering each sensor, (4) check outputs without starting the hydraulic pump (only verify solenoid valve LEDs), (5) jog each motor individually while ensuring no mechanical interference\u202f<sup id=\"fnref5:1\"><a href=\"#fn%3A1\" class=\"footnote-ref\">1<\/a><\/sup>.<\/p>\n<p><img decoding=\"async\" src=\"\/zh\/wp-content\/uploads\/2026\/06\/steel-tube-bundling-strapping-line2.webp\" alt=\"steel tube bundling &amp; strapping line\" \/><\/p>\n<h2>\ud83d\udee0\ufe0f Purchase\u2011Decision Checklist<\/h2>\n<ul>\n<li>\n<p>[ ] <strong>Mechanical alignment<\/strong> \u2013 Verify nylon block pitch tolerance \u2264\u00b10.5\u202fmm using a caliper. Request a block alignment report from the supplier.<\/p>\n<\/li>\n<li>\n<p>[ ] <strong>Sensor calibration<\/strong> \u2013 Inductive sensors must detect tube presence with a 4\u202fmm gap. Test with a sample tube at both ends of the chain.<\/p>\n<\/li>\n<li>\n<p>[ ] <strong>Count timing validation<\/strong> \u2013 Run a dry cycle (no tubes) with at least 20 sensor triggers at 3\u2011second intervals. The PLC counter must match exactly.<\/p>\n<\/li>\n<li>\n<p>[ ] <strong>Magnetic pickup demagnetization<\/strong> \u2013 After a full bundle cycle, confirm the pickup releases within 0.5\u202fs. Use a gaussmeter if available.<\/p>\n<\/li>\n<li>\n<p>[ ] <strong>Speed match test<\/strong> \u2013 Feed tubes at actual line speed (e.g., 65\u202fm\/min). No double\u2011fed tubes allowed over 10 consecutive bundles.<\/p>\n<\/li>\n<li>\n<p>[ ] <strong>Emergency stop test<\/strong> \u2013 Press E\u2011stop at any random point in the cycle. The machine must stop within 200\u202fms and require manual reset.<\/p>\n<\/li>\n<li>\n<p>[ ] <strong>Spare parts kit<\/strong> \u2013 Confirm the supplier provides extra nylon blocks, spare sensors, and a programmed PLC backup card.<\/p>\n<\/li>\n<\/ul>\n<p>For detailed technical consultation, refer to the <strong>original equipment manual<\/strong> at <a href=\"https:\/\/www.fhopepack.com\/Steel-tube-strapping-machine\/\">Steel tube strapping machine<\/a>.<\/p>\n<blockquote>\n<p>\ud83d\udee1\ufe0f <strong>Compliance Note<\/strong>: This equipment is designed to meet ISO and ASTM requirements. Verify with the manufacturer.<\/p>\n<\/blockquote>\n<p><img decoding=\"async\" src=\"\/zh\/wp-content\/uploads\/2026\/06\/steel-tube-bundling-strapping-line4.webp\" alt=\"steel tube bundling &amp; strapping line\" \/><\/p>\n<h2>\ud83c\udfd7\ufe0f FAQ<\/h2>\n<p><strong>Q: Can I reduce the counting interval below 3 seconds for higher production?<\/strong><br \/>\nA: No \u2013 the commissioning record\u202f<sup id=\"fnref6:1\"><a href=\"#fn%3A1\" class=\"footnote-ref\">1<\/a><\/sup> shows intervals below 3\u202fs cause magnetic pickup failures. The 3\u2011s dwell is a hard limit for the current PLC logic. If faster cycles are required, ask the supplier to reprogram the counting algorithm with a hardware\u2011accelerated sensor.<\/p>\n<p><strong>Q: How do I know if the compensation parameter needs adjustment?<\/strong><br \/>\nA: Measure the actual bundle length with a tape measure. If the deviation exceeds \u00b12\u202fmm from the set value, adjust the compensation parameter by <strong>1 unit only<\/strong>. Re\u2011measure. Repeat until the deviation is \u22641\u202fmm.<\/p>\n<p><strong>Q: What should I do if the servo motor does not respond after a normal stop?<\/strong><br \/>\nA: Try a full power\u2011off cycle (disconnect main power for 30\u202fs, then restart). If the issue persists, check the servo driver error code. Common cause: over\u2011travel limit switch triggered. Manually jog the servo back to home position via the HMI (use \u201cServo Fault Reset\u201d button in the interface).<\/p>\n<p><strong>Q: The HMI shows \u201cDouble feed\u201d alarm \u2013 how to clear it?<\/strong><br \/>\nA: First, remove the two stacked tubes manually. Then restart the cycle from the beginning. The alarm is a safety lock; it will not clear automatically. Verify the upstream conveyor speed matches the PLC\u2011expected value (see Parameter Breakdown table). If the speed varies, the technician must adjust the timing code.<\/p>\n<hr \/>\n<div class=\"footnotes\">\n<hr \/>\n<ol>\n<li id=\"fn:1\">\n<p>The failure modes and limits cited throughout this guide are documented in the commissioning record for this line (internal document #CR\u20112023\u201105). All numerical limits are sourced from measured data during site acceptance testing unless otherwise noted. For estimated specifications (e.g., tube range, bundle weight), confirm with the supplier and verify on site.&#160;<a href=\"#fnref1%3A1\" rev=\"footnote\" class=\"footnote-backref\">&#8617;<\/a> <a href=\"#fnref2%3A1\" rev=\"footnote\" class=\"footnote-backref\">&#8617;<\/a> <a href=\"#fnref3%3A1\" rev=\"footnote\" class=\"footnote-backref\">&#8617;<\/a> <a href=\"#fnref4%3A1\" rev=\"footnote\" class=\"footnote-backref\">&#8617;<\/a> <a href=\"#fnref5%3A1\" rev=\"footnote\" class=\"footnote-backref\">&#8617;<\/a> <a href=\"#fnref6%3A1\" rev=\"footnote\" class=\"footnote-backref\">&#8617;<\/a><\/p>\n<\/li>\n<\/ol>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>\ud83d\udee0\ufe0f Working Principle The steel tube bundling and strapping line uses a chain conveyor with nylon blocks spaced at 200\u202fmm (large) and 50\u202fmm (small) to align round or square tubes, then a magnetic pickup and strapping head form uniform bundles under PLC\u2011controlled sensor feedback. The large blocks create a cradle for round tubes; the small [&hellip;]<\/p>","protected":false},"author":1,"featured_media":16938,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"The steel tube bundling and strapping line uses a chain conveyor with nylon blocks spaced at 200\u202fmm (large) and 50\u202fmm (small) to align round or square tubes, then a magnetic pickup and strapping head form uniform bundles under PLC\u2011controlled sensor feedback.","_seopress_robots_index":"","fifu_image_url":"https:\/\/www.fhopepack.com\/blog\/wp-content\/uploads\/2023\/07\/Steel-Tube-Bundle-Strapping-Machine.webp","fifu_image_alt":"","footnotes":""},"categories":[726],"tags":[],"class_list":["post-16922","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-steel-tube-packing-systems"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.fhopepack.com\/zh\/wp-json\/wp\/v2\/posts\/16922","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fhopepack.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fhopepack.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fhopepack.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fhopepack.com\/zh\/wp-json\/wp\/v2\/comments?post=16922"}],"version-history":[{"count":3,"href":"https:\/\/www.fhopepack.com\/zh\/wp-json\/wp\/v2\/posts\/16922\/revisions"}],"predecessor-version":[{"id":16939,"href":"https:\/\/www.fhopepack.com\/zh\/wp-json\/wp\/v2\/posts\/16922\/revisions\/16939"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fhopepack.com\/zh\/wp-json\/wp\/v2\/media\/16938"}],"wp:attachment":[{"href":"https:\/\/www.fhopepack.com\/zh\/wp-json\/wp\/v2\/media?parent=16922"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fhopepack.com\/zh\/wp-json\/wp\/v2\/categories?post=16922"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fhopepack.com\/zh\/wp-json\/wp\/v2\/tags?post=16922"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}