Magswitch Technology MAGJIG95 On/Off Magnetic with 95 lb/43 kg of Vertical Holding Force Yellow

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Now, the cool part about a Magswitch ® is that you can turn it OFF. Here’s where the magic happens. The change from the AH180 hall-effect sensor to the S-5716 sensor changes the way that the switch works. Previously, the switch would change state when the magnet was removed. Now... Read more » If you need more than a design, we’ve got you covered at a fraction of the cost of a machine shop. Magswitch can help you customize a range of components to expand the usability of your tool. Edit 2020-02-02: BHarbour pointed out my laziness in his comment. The following is a bit of extra work to solidify the design.] Reducing the standby current:

With load current 35A, the voltage across the switch was 40mV (that's 1.1mΩ). Power dissipation is only 1.3W, which should not be a problem for a board even this small. I repeated the measurement with 20A load current and got 22mV across the switch, and the same switch resistance. No changes required. So here's the plan:

Our products are designed to be ‘fail safe’ since there is no need for any power during a lift. With a positive indication of the magnetic circuit, the operator can confidently perform knowing the material is fully attached. Magswitch offers Electric, Pneumatic, or Manual for ‘on-off’ actuation. Performance Magswitch Technology, a worldwide leading manufacturer of switchable magnets, the introduction of the original MagPry was revolutionary new way to align steel plates or press stiffener beams in shipyards. Changing the Way Things Were Done Magnets can be positioned at different points on the fence for optimal placement on drill press tables. There may be some users that want to locate the hall-effect sensor away from the main circuit board. I added pads to allow leads to be soldered instead of mounting the sensor on the board. The condition of the surface also matters. If it’s painted, the magnet is a tiny bit farther away from the steel, so you get less force. Have a rusty surface? Less force. Maybe your surface has an irregular shape; this might also affect the force.

The switch no longer is sensitive to disconnection by high currents. I ran more than 35A through it and it remained closed. It is apparent that a 30V rating is not enough to prevent inductive transients damaging the LDO. The second pass, and all the other mag switch circuits, will have a protection resistor to prevent this in the future. After replacing the LDO and the hall-effect device, which was also damaged by the event, I jury-rigged a 330Ω protection resistor in between the LDO and the battery. I plugged/unplugged the battery many times to see if there was any remaining tendency to smoke, but the circuit doesn't have that problem anymore. High Current measurements: At Magswitch, we strive to ensure every Magswitch tool makes the work place safer, improves productivity, is maintenance free, reduces energy consumption, is easy to use and has an ROI measured in weeks or months. In short, a Magswitch tool is designed to exceed customer expectations! Electromagnetic and vacuum lifting systems are costly in the long term regarding energy and maintenance costs. Magswitch ‘Greentech’ technology will offer you significant savings in energy and repairs while increasing productivity. Custom SolutionsIt’s a great demonstration of how it works. Initially, when building it, we thought we might show all the details so our readers could learn how to do it themselves (and maybe buy some K&J magnets to do it). However, we learned that assembly is a real challenge. We also found that we spent more money on magnets and parts from the hardware store than if we had just bought a Magswitch ®. Every Magswitch product is proudly designed, developed, manufactured and tested by Magswitch to ISO 9001:2015 standards. Frequently Asked Questions What is Magswitch Shallow field?