{"id":6829,"date":"2025-12-12T17:08:35","date_gmt":"2025-12-12T09:08:35","guid":{"rendered":"https:\/\/www.qhsmt.com\/?post_type=product&#038;p=6829"},"modified":"2025-12-12T17:08:43","modified_gmt":"2025-12-12T09:08:43","slug":"desktop-selection-welding-qso-300b","status":"publish","type":"product","link":"https:\/\/www.qhsmt.com\/zh\/product\/desktop-selection-welding-qso-300b\/","title":{"rendered":"Desktop selection welding QSO-300B"},"content":{"rendered":"<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1007\" height=\"1024\" src=\"https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/4-1007x1024.png\" alt=\"\" class=\"wp-image-6830\" style=\"aspect-ratio:0.9834086377522089;width:800px;height:auto\" srcset=\"https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/4-1007x1024.png 1007w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/4-737x750.png 737w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/4-768x781.png 768w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/4-1510x1536.png 1510w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/4-2013x2048.png 2013w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/4-133x135.png 133w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/4-235x239.png 235w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/4-480x488.png 480w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/4-740x753.png 740w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/4-1520x1546.png 1520w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/4-600x610.png 600w\" sizes=\"(max-width: 1007px) 100vw, 1007px\" \/><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong><mark style=\"background-color:#fcb900\" class=\"has-inline-color has-white-color\">Functions<\/mark><\/strong><br><strong>Precise local soldering: <\/strong>Selective tin spraying soldering is performed for specific solder joints on PCBs, such as plug-in components and irregular components, to avoid sensitive components and reduce thermal damage.<br><strong>Suitable for small batch production:<\/strong> The desktop design is flexible and portable, suitable for research and development sampling, small batch and multi variety SMT production line soldering, and reduces the cost of changing lines.<br><strong>Improving welding quality:<\/strong> Compared to manual welding, the amount of solder can be controlled, the consistency of solder joints is high, reducing virtual soldering and continuous soldering defects, and ensuring product reliability.<\/p>\n\n\n\n<figure class=\"wp-block-video\"><video height=\"720\" style=\"aspect-ratio: 1280 \/ 720;\" width=\"1280\" controls src=\"https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/5d3d83af541865387d594d0fe17b46ce-1.mp4\"><\/video><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Specifications<\/td><td>Parameter<\/td><\/tr><tr><td>Overall Dimensions<\/td><td>1100L*790W*1500H(mm)<\/td><\/tr><tr><td>Machine frame<\/td><td>Steel structure+baking paint<\/td><\/tr><tr><td>Machine appearance<\/td><td>Open-type<\/td><\/tr><tr><td>Board-taking and<br>-placing method<\/td><td>Manual taking and placing<\/td><\/tr><tr><td>Operating height<\/td><td>900\u00b120mm<\/td><\/tr><tr><td>Weight<\/td><td>Approx.280KG<\/td><\/tr><tr><td>Power supply<\/td><td>1\u03c6 220V 50\/60HZ<\/td><\/tr><tr><td>Total power<\/td><td>3KW<\/td><\/tr><tr><td>Welding real-time monitoring<\/td><td>Standard configuration<\/td><\/tr><tr><td>Programming methods<\/td><td>Picture programming,Gerber document,visual teaching programming,<br>etc.<\/td><\/tr><tr><td colspan=\"2\">PCB&nbsp;parameter<\/td><\/tr><tr><td>PCB size<\/td><td>Min:30(L)*30(W);Max:350(L)*250(W)(mm)<\/td><\/tr><tr><td>Top component height<\/td><td>Max280mm<\/td><\/tr><tr><td>Bottom component height<\/td><td>Max30mm<\/td><\/tr><tr><td>PCB Weight<\/td><td>Max5Kg<\/td><\/tr><tr><td>PCB Process Edge<\/td><td>&gt;3mm<\/td><\/tr><tr><td colspan=\"2\">Selective&nbsp;spray&nbsp;system<\/td><\/tr><tr><td>Spray movement mode<\/td><td>PCB movement in XYZ axis<\/td><\/tr><tr><td>Spray flux volume<\/td><td>1L<\/td><\/tr><tr><td>Spray flux add mode<\/td><td>Manual<\/td><\/tr><tr><td>Spray nozzle type<\/td><td>Needle<\/td><\/tr><tr><td>Spray cycle time<\/td><td>1 Sec\/soldered dot(The minimum spray time can be set to 0.1 seconds)<\/td><\/tr><tr><td>Spray movement precision<\/td><td>0.05mm<\/td><\/tr><tr><td>Spray flow control<\/td><td>Pressure gage +flow valve<\/td><\/tr><tr><td>Spray travel speed<\/td><td>0-400 mm per second adjustable<\/td><\/tr><tr><td colspan=\"2\">Selective&nbsp;Soldering&nbsp;System<\/td><\/tr><tr><td>Welding movement mode<\/td><td>PCB movement in XYZ axis<\/td><\/tr><tr><td>Movement mode<\/td><td>Servo motor +linear rail<\/td><\/tr><tr><td>Solder feeding mode<\/td><td>Manual<\/td><\/tr><tr><td>Solder capacity<\/td><td>15KG<\/td><\/tr><tr><td>Solder melting time<\/td><td>45min<\/td><\/tr><tr><td>Solder power<\/td><td>1.2KW<\/td><\/tr><tr><td>Solder nozzle size<\/td><td>Standard with 5 solder tips(3-64-86-108-1210-14)<\/td><\/tr><tr><td>Solder cycle time<\/td><td>1~6 Sec\/soldered dot<\/td><\/tr><tr><td>Temperature control mode<\/td><td>PID+SSR<\/td><\/tr><tr><td>Temperature setting range<\/td><td>Max350\u2103<\/td><\/tr><tr><td>Temperature accuracy<\/td><td>\u00b12\u2103<\/td><\/tr><tr><td>Waver height<\/td><td>Max 0-8mm<\/td><\/tr><tr><td>Welding precision<\/td><td>\u00b10.1mm<\/td><\/tr><tr><td>welding moving speed<\/td><td>0-4000mm adjustable<\/td><\/tr><tr><td>Solder dross<\/td><td>0.2Kg\/8H(Not N2 protection);0.01Kg\/8H(N2 protection)<\/td><\/tr><tr><td colspan=\"2\">N2 protection system<\/td><\/tr><tr><td>N2 protection mode<\/td><td>Nozzle and solder pot<\/td><\/tr><tr><td>N2 consumption<\/td><td>1.5M\u00b3\/h(Nitrogen&nbsp; concentration&gt;99.999%)<\/td><\/tr><tr><td>N2 flow control<\/td><td>Glass rotor flowmeter<\/td><\/tr><tr><td colspan=\"2\">Exhaust&nbsp;system<\/td><\/tr><tr><td>Top cover exhaust<\/td><td>Customer supply<\/td><\/tr><tr><td>Exhaust quantity<\/td><td>1 PCS<\/td><\/tr><tr><td>Exhaust volume<\/td><td>About 5m\u00b3\/h(Provided by the customer with an external exhaust<br>channel)<\/td><\/tr><tr><td colspan=\"2\">Control&nbsp;system<\/td><\/tr><tr><td>Control mode<\/td><td>PC+motion control card<\/td><\/tr><tr><td>PCB Process parameter<\/td><td>Setting,save,open in the PC screen<\/td><\/tr><tr><td>Other<\/td><td>PCB counting,message,alarm can be read in the PC<\/td><\/tr><tr><td colspan=\"2\">Option<\/td><\/tr><tr><td colspan=\"2\">Electromagnetic pump tin furnace<\/td><\/tr><tr><td colspan=\"2\">Flux injection valve<\/td><\/tr><tr><td colspan=\"2\">500\u00b0high temperature tin furnace<\/td><\/tr><tr><td colspan=\"2\">Peak height detection<\/td><\/tr><tr><td colspan=\"2\">2cubic nitrogen generator<\/td><\/tr><tr><td colspan=\"2\">Common&nbsp;Wear&nbsp;&amp;Tear&nbsp;Parts<\/td><\/tr><tr><td colspan=\"2\">Welding nozzle,nozzle cleaning fluid,high-temperature bearing<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<div data-block-name=\"woocommerce\/product-best-sellers\" class=\"wc-block-grid wp-block-product-best-sellers wc-block-product-best-sellers has-3-columns has-multiple-rows\"><ul class=\"wc-block-grid__products\"><li class=\"wc-block-grid__product\">\n\t\t\t\t<a href=\"https:\/\/www.qhsmt.com\/zh\/product\/single-rail-cap-pulling-machine-rh02\/\" class=\"wc-block-grid__product-link\">\n\t\t\t\t\t<div class=\"wc-block-grid__product-image\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/05\/4-300x300.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Industrial manufacturing machine with a side-mounted touchscreen monitor and control panel on the right side.\" srcset=\"https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/05\/4-300x300.png 300w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/05\/4-400x400.png 400w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/05\/4-90x90.png 90w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/05\/4-480x480.png 480w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/05\/4-740x740.png 740w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/05\/4-100x100.png 100w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div>\n\t\t\t\t\t<div class=\"wc-block-grid__product-title\">Single Rail Cap Pulling Machine RH02<\/div>\n\t\t\t\t<\/a>\n\t\t\t\t\n\t\t\t\t<div class=\"wc-block-grid__product-price price\"><\/div>\n\t\t\t\t\n\t\t\t\t<div class=\"wp-block-button wc-block-grid__product-add-to-cart\"><a href=\"https:\/\/www.qhsmt.com\/zh\/product\/single-rail-cap-pulling-machine-rh02\/\" aria-label=\"\u8be6\u7ec6\u4e86\u89e3 \u201cSingle Rail Cap Pulling Machine RH02\u201d\" data-quantity=\"1\" data-product_id=\"7109\" data-product_sku=\"\" rel=\"nofollow\" class=\"wp-block-button__link wp-element-button add_to_cart_button\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\">\u9605\u8bfb\u66f4\u591a<\/a><\/div>\n\t\t\t<\/li><li class=\"wc-block-grid__product\">\n\t\t\t\t<a href=\"https:\/\/www.qhsmt.com\/zh\/product\/wave-soldering-output-conveyor-qj400-bo\/\" class=\"wc-block-grid__product-link\">\n\t\t\t\t\t<div class=\"wc-block-grid__product-image\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/\u672a\u6807\u9898-2-300x300.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Wave soldering output conveyor QJ400-BO\" srcset=\"https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/\u672a\u6807\u9898-2-300x300.png 300w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/\u672a\u6807\u9898-2-400x400.png 400w, 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class=\"wp-block-button__link wp-element-button add_to_cart_button\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\">\u9605\u8bfb\u66f4\u591a<\/a><\/div>\n\t\t\t<\/li><li class=\"wc-block-grid__product\">\n\t\t\t\t<a href=\"https:\/\/www.qhsmt.com\/zh\/product\/benchtop-manual-smt-frameless-pcb-solder-paste-stencil-printer-printing-machine\/\" class=\"wc-block-grid__product-link\">\n\t\t\t\t\t<div class=\"wc-block-grid__product-image\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/BB0A9B8B1412089AF6AB7C4FB7C82DFD-1-300x300.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Benchtop Manual Smt Frameless PCB Solder Paste Stencil Printer Printing Machine\" srcset=\"https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/BB0A9B8B1412089AF6AB7C4FB7C82DFD-1-300x300.jpg 300w, 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Smt Frameless PCB Solder Paste Stencil Printer Printing Machine\u201d\" data-quantity=\"1\" data-product_id=\"7003\" data-product_sku=\"\" rel=\"nofollow\" class=\"wp-block-button__link wp-element-button add_to_cart_button\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\">\u9605\u8bfb\u66f4\u591a<\/a><\/div>\n\t\t\t<\/li><li class=\"wc-block-grid__product\">\n\t\t\t\t<a href=\"https:\/\/www.qhsmt.com\/zh\/product\/smt-manual-frameless-pcb-solder-paste-stencil-printer\/\" class=\"wc-block-grid__product-link\">\n\t\t\t\t\t<div class=\"wc-block-grid__product-image\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/8faf33ca071fa856257cea836c4de4b4-300x300.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"SMT Manual Frameless Pcb Solder Paste Stencil Printer\" 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srcset=\"https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/\u5fae\u4fe1\u56fe\u7247_20260113110602_321_31-300x300.png 300w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/\u5fae\u4fe1\u56fe\u7247_20260113110602_321_31-750x750.png 750w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/\u5fae\u4fe1\u56fe\u7247_20260113110602_321_31-400x400.png 400w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/\u5fae\u4fe1\u56fe\u7247_20260113110602_321_31-768x768.png 768w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/\u5fae\u4fe1\u56fe\u7247_20260113110602_321_31-90x90.png 90w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/\u5fae\u4fe1\u56fe\u7247_20260113110602_321_31-133x133.png 133w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/\u5fae\u4fe1\u56fe\u7247_20260113110602_321_31-235x235.png 235w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/\u5fae\u4fe1\u56fe\u7247_20260113110602_321_31-480x480.png 480w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/\u5fae\u4fe1\u56fe\u7247_20260113110602_321_31-740x740.png 740w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/\u5fae\u4fe1\u56fe\u7247_20260113110602_321_31-600x600.png 600w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/\u5fae\u4fe1\u56fe\u7247_20260113110602_321_31-100x100.png 100w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2026\/01\/\u5fae\u4fe1\u56fe\u7247_20260113110602_321_31.png 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div>\n\t\t\t\t\t<div class=\"wc-block-grid__product-title\">SMT frameless steel stencil screen printing table<\/div>\n\t\t\t\t<\/a>\n\t\t\t\t\n\t\t\t\t<div class=\"wc-block-grid__product-price price\"><\/div>\n\t\t\t\t\n\t\t\t\t<div class=\"wp-block-button wc-block-grid__product-add-to-cart\"><a href=\"https:\/\/www.qhsmt.com\/zh\/product\/smt-frameless-steel-stencil-screen-printing-table\/\" aria-label=\"\u8be6\u7ec6\u4e86\u89e3 \u201cSMT frameless steel stencil screen printing table\u201d\" data-quantity=\"1\" data-product_id=\"6946\" data-product_sku=\"\" rel=\"nofollow\" class=\"wp-block-button__link wp-element-button add_to_cart_button\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\">\u9605\u8bfb\u66f4\u591a<\/a><\/div>\n\t\t\t<\/li><li class=\"wc-block-grid__product\">\n\t\t\t\t<a href=\"https:\/\/www.qhsmt.com\/zh\/product\/nitrogen-generator-used-for-selective-welding\/\" class=\"wc-block-grid__product-link\">\n\t\t\t\t\t<div class=\"wc-block-grid__product-image\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/\u5236\u6c2e\u673a1-300x300.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Nitrogen generator, used for selective welding\" srcset=\"https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/\u5236\u6c2e\u673a1-300x300.png 300w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/\u5236\u6c2e\u673a1-400x400.png 400w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/\u5236\u6c2e\u673a1-90x90.png 90w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/\u5236\u6c2e\u673a1-133x134.png 133w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/\u5236\u6c2e\u673a1-480x480.png 480w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/\u5236\u6c2e\u673a1-740x740.png 740w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/12\/\u5236\u6c2e\u673a1-100x100.png 100w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div>\n\t\t\t\t\t<div class=\"wc-block-grid__product-title\">Nitrogen generator, used for selective welding<\/div>\n\t\t\t\t<\/a>\n\t\t\t\t\n\t\t\t\t<div class=\"wc-block-grid__product-price price\"><\/div>\n\t\t\t\t\n\t\t\t\t<div class=\"wp-block-button wc-block-grid__product-add-to-cart\"><a href=\"https:\/\/www.qhsmt.com\/zh\/product\/nitrogen-generator-used-for-selective-welding\/\" 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add_to_cart_button\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\">\u9605\u8bfb\u66f4\u591a<\/a><\/div>\n\t\t\t<\/li><li class=\"wc-block-grid__product\">\n\t\t\t\t<a href=\"https:\/\/www.qhsmt.com\/zh\/product\/smt-semi-automatic-pick-and-place-machine-with-dispenser\/\" class=\"wc-block-grid__product-link\">\n\t\t\t\t\t<div class=\"wc-block-grid__product-image\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/11\/3-1-300x300.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"SMT semi-automatic pick and place machine with Dispenser\" srcset=\"https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/11\/3-1-300x300.png 300w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/11\/3-1-400x400.png 400w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/11\/3-1-90x90.png 90w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/11\/3-1-133x134.png 133w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/11\/3-1-480x480.png 480w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/11\/3-1-740x740.png 740w, https:\/\/www.qhsmt.com\/wp-content\/uploads\/2025\/11\/3-1-100x100.png 100w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div>\n\t\t\t\t\t<div class=\"wc-block-grid__product-title\">SMT semi-automatic pick and place machine with Dispenser<\/div>\n\t\t\t\t<\/a>\n\t\t\t\t\n\t\t\t\t<div class=\"wc-block-grid__product-price price\"><\/div>\n\t\t\t\t\n\t\t\t\t<div class=\"wp-block-button wc-block-grid__product-add-to-cart\"><a href=\"https:\/\/www.qhsmt.com\/zh\/product\/smt-semi-automatic-pick-and-place-machine-with-dispenser\/\" aria-label=\"\u8be6\u7ec6\u4e86\u89e3 \u201cSMT semi-automatic pick and place machine with Dispenser\u201d\" data-quantity=\"1\" data-product_id=\"6771\" data-product_sku=\"\" rel=\"nofollow\" class=\"wp-block-button__link wp-element-button add_to_cart_button\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\">\u9605\u8bfb\u66f4\u591a<\/a><\/div>\n\t\t\t<\/li><\/ul><\/div>","protected":false},"excerpt":{"rendered":"<p>FunctionsPrecise local soldering: Selective tin spraying soldering is performed for specific solder joints on PCBs, such as plug-in components and irregular components, to avoid sensitive components and reduce thermal damage.Suitable for small batch production: The desktop design is flexible and portable, suitable for research and development sampling, small batch and multi variety SMT production line 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