I'd like to check our motors with a Hipot test. The field wires are a bit close to the metal housing. The motors are universal and we run them on 115 vac 60 hz. I assume I should use an AC Hipot. When would one use a DC Hipot test?
We currently use double roll pins to attach a gear to a shaft (5/16 OD with 3/16 OD Pin pressed inside). I need about another 30% shear strength. I thought about a heat treated 4340 solid pin for high strength but am worried about its shock resistance. Any suggestions on a good...
I'm using an MC34071 op amp with a "FlexiForce" load sensor connected per the drawing supplied by the maker of the load sensor (Tekscan):
http://www.tekscan.com/flexiforce/specs_flexiforce.html.
The output of the op amp goes to about +8.5 volts and won't change much (changes about .2 volts)...
I'm using a Linx single chip receiver to control an electric motor. The motor puts out a lot of electrical noise. Shielding it helps considerably. I'm wondering what might be going on in the receiver when it cuts out. It acts like it might be going into saturation somewhere. The motor will...
I'd like to use a silicone rubber keypad for our products. However, my experience with membrane switches hasn't been good. I find that many, over time, have trouble making electrical contact. I'm guessing a film develops on the PCB. Is the contact technology better these days? What would I...
How does one receive the radio broadcasted time signal? Is there a single chip out there that will receive the signal and demodulate it and decode it? So many inexpensive clocks use the signal so it must be fairly easy to get.
I'm incorporating a Linx RF module onto a circuit board. How to get its RF input to a remote antenna is my challange. A this point I'd like to connect a couple of small gage stranded wires between the board and a bulkhead SMA connector- one wire soldered to the central post of the connector...
I'd like to forge several steel shafts but I think the quantites we use may be too small. We go thru about 800 pcs/year. The shafts would be about 7/8 dia x 12" long with a hub of 2" dia x .88 long on one end. Quantities too small for any forging process?
We test the electrical controls for our winches by actually connecting the controls to the winch and loading the winch. I'd like to use a programable electronic load in place of the winch. To simulate the on/of transients of the winch's motor the electronic load would ideally have a...
We're thinking about power coating our aluminum products. The powder needs to be baked @375 Deg F for 10 minutes. The castings are 356 - T6 both permanent mold and sand cast. I'm worried they might distort in the oven. Anyone with experience with something like this?
We're working on adding an RF control to our winches. Our winches use a high speed commutating motor that emits a fair amount of RF noise. I'm not pleased with the range we're getting with the 418 Mhz RF modules. Without the motor running the range is much better. I'm thinking the motor...
I need to design a small dyno to test our product. It will need to drive and "absorb" power. Near zero to about 700 RPM in torque control. Max torque about 180 in#. I was thinking a vector drive with regen. Any comments?
I've read the description on their web site but I can't figure out how it works. It sounds like there is no iron in the rotor and just a lot of "turns" to get a high NI. I'm sure I'm missing something. Can anyone explain how it develops torque different than a wound DC motor?
