ICSTATION 4 Digital Red LED Tachometer RPM Speed Meter AC 110V-230V Digital Motor Tachometer with Hall Proximity Switch Sensor NPN for Lathe Conveyor Belt

I have a Shopsmith Mark 5 machine. I primarily use the drill press function these days. It has a variable speed dial labeled with letters rather than actual RPM, so I was looking to add a digital speed readout. This tachometer is reasonably priced and looked like it would do the job. The package arrived quickly and was easy to assemble, but required soldering three wires to connect the hall sensor to the three-pin connector. I wired up a 110 power cord and attached the magnet to the power take-off shaft, held the hall effect sensor close to the shaft and the RPM was immediately displayed. I also attached the magnet to the side of the chuck and the sensor still read the RPM. I will need to fashion a bracket to permanently mount the Hall sensor and the electronics. In summary, it works great.

Installed according to the instructions, proper distance, etc and I get HHHH and varying RPM. I bought two of these and tried them both. Same results. What's wrong? UPDATE: it's not the product. I'm getting line interference from my VFD. Shut off the VFD, put a socket in the chuck and spun it up freewheel. Works fine. Check your line interference

I bought this for my lathe. Installed it in the control cabinet and the sensor & magnet on the spindle pulley. I got the sensor about .060 inches from the magnet. Erratic readings, it jumps all over. adjusted sensor position multiple times, same result. erratic readings. Kind of works, but number jumps around too much to be useful. I'm buying an induction sensor to see if that works any better per another reviewer's success. (Taiss 2pcs LJ12A3-4-Z/AX Proximity Switch Inductive Proximity Sensor) So why 4 stars? Great support! Vendor provided refund for my second unit, I am now trying a third. (First one I put on my drill press) I really want this to work as otherwise there is a big hole in my cabinet.

This tach works great on the lathe. Attaching the magnet to the change-gear end of the spindle lets me know what the true spindle rotation speed is. It is simple to make a small bracket to hold the sensor under the gear cover. I mounted the display on a plastic project box with a small switch for power. I chose this tach because it was AC powered and didn't need an extra power supply. Very happy with this product.

This item did not function for me. No ouput on the display. Multiple adjustments made without resolve. This is unfortunate as I already have it hard wired into a system. I hope the seller sees this and has some way of helping me figure it out.

Works really well after I installed an EMI filter (uxcell a15060800ux0461 10A CW1B-10A-L Noise Suppressor Power EMI Filter, AC 115V/250V ) on the power side of it. I'm running a VFD and I think it was getting noise from it. before it just kept changing from the speed I was running to some speed 2 or 3 times faster and back again.

Does everything it's suppose to. Messed up the magnet orientation originally so fair warning that the magnet orientation matter a lot (probably my fault).

The product was priced right and looks like it would be a good choice for checking the rpm of a piece of machinery. It is fairly intuitive on how it should be wired but there were no directions included... no specifications for the distance the pickup should be from the magnet, or that the magnet polarity is important for the unit to work. I learn this information from You tube. My unit powered up but didn't read the RPM and just blinked "HHHH" on the read out. I sent it back for a replacement and I am waiting to see if the next unit will work. The good thing is that Amazon has a great return policy.