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I copied your code into my Arduino IDE, I compiled for Uno hardware. I fixed your missing quotes. Also a mis-spelled attempt to print degrees as degreesetKey. #include <Wire.h> #include <LiquidCrystal_I2C.h> #include <Keypad.h> const byte /* */ ROWS = 4; const byte COLS = 4; char...

I saw this months ago. The guy makes a bees wax cutting fluid.

The input diodes, are designed for single phase input up to the 3HP drive size. This I've gotten from many different forums with VFD experts commenting. For larger then 3HP, the derating is double the Drive size for the motor. But that would be for full rated motor power delivered. In my case I...

I just purchased from eBay a Mitsubishi Electric FR-D720-042-W1 VFD for $69USD (brand new). This is a 1 HP max drive. I just tested it today with single phase power on a 1 HP 3 phase motor. This price is unbeatable. I could not find what the W1 means in the part number. That location is...

Any issues of EMI (or electro magnetic compatibility; EMC) are from long runs of wire between the VFD and motor, keep them less then 6ft/2meters long and you'll have zero issues of upset of any control wires used to remote the start stop speed. The manual has the requirements for the...

I'm not opposed to the noname VFDs I see on eBay. Just last week my neighbor purchased one to run his 10HP air compressor. It took a bit to get it to run the machine, as acceleration time and other parameters caused it to overcurrent. I got that to operate pretty well. They have been improving...

I'm late to this discussion. First the VFD, if you want high torque at low Hz output, you want to make sure it is of the "sensorless vector drive" type of VFD, not the typical scalar type drive. For both my mill and lathe, I leave the V-belts set to the mid range of the machine. The motors are...

My 10x24 bench top lathe was noisy, and I replaced the two belts with link belts. Made a big difference.

I got replacements from eBay, so far they have not rounded out the torx head.

On my computer it brings up this;

I purchased this same rotary table about 15 years ago from Harbor Freight. It was made in India. It is very poor quality. I recall paying $90 for mine. The crank drive to the worm gear is very stiff, and there was too much backlash. Maybe the quality has improved. But mine sits on the shelf...

I can't see any big differences between the Nano and Uno in I/O that would account for non operation. I would take a guess you have a ground not connected between the Nano and your stepper motor drivers. But I'm guessing without seeing your wiring diagram.

Thank you for your post. I'm not wanting to fix a B&S as the OP is doing. I was looking for general information for the repair of the Onan engine. It's a very old design. Cummings bought them a few years back and stopped all parts deliveries. So it's make the parts or scrap it. But I was asking...

My understanding is Stellite is a special conformal coating of valves to enable high temp operation. I've never heard of it in a solid form to make valves or seat from. I'll have to research that.

I came to this post to see what sort of heat treat steel should be used to make a valve seat. I'm only seeing recommendations of using common pipe or ductile iron. I understand this is a cheap B&S engine, and disposable. I fix mine also. But a few years back I needed to make a new exhaust valve...

I was 'surfing' youtube and this channel came up with this about high voltage coil drivers; I hope this is of interest to this thread.

Those look very clean of noise. Looks like the low pass RC worked per design. So is that ringing frequency a function of your transmission line length, assuming it's the reflected wave bouncing back and forth?

I wanted to see what it would come up with. My career was doing the qualification testing of commercial avionics products (Shake, Bake, EMI per RTCA DO-160) as part of the FAA and EAA certification process for TSO or PMA products. I spent hours trying to fix EMI emissions and susceptibility...

Don; Other's may be interested in the technical aspect of making these measurements, so I'm replying to your post. For laughs, I asked openAI (ChatGPT) this question; "How to filter the broadband noise while measuring spark plug voltage and current in an experimental ignition system?" I got the...

Don, I'm curious to understand how you took your digital scope data loaded into Excel, and computed the Joules given a voltage and current waveform. Reference the first table, in your report in post #1. I'm guessing you are treating them as sine waves, and computing some sort of RMS averaging...