This question is mostly for the Math Smiths. We will be using one of our servo amplifiers to micro step a two phase stepper motor. The customers controller creates sine and cosine current commands, we supply two current loops.
The amplifier is a linear amplifier so the customers sensors don't...
We have been asked to bid on a custom amplifier for a US Navy application. All of our work to date has been commercial, ship board Navy is entirely new territory for us. Can some one direct me to documents on environmental requirements and testing. Also, preferred parts for connectors...
Is EtherCAT becoming the defacto standard for servo amplifier serial communication? Are the commands likely to be PWM, Phase command current or position? Aor all of the above?
I now this has been asked many times before [and answered] but; the compnay I work for has purchased a machine builder in Europe [Holland] with the intent of building the machines in the USA. We need to translate their drawing material call outs to US equivilents. I know there are...
Gentlemen,
Where I work we have a mechanical designer who often makes bold assertions to support his position that I believe are often specious. Having said that:
A weldment had to be made from 304 SS instead of Aluminum because it would be very difficult to weld Aluminum. The weldment is a...
Can anyone provide a starting point for MIL SPECs related to Electronics used on a US Nuclear Submarine. Temperature, shake rattle and roll, EMI, Electrical Suceptabilty, etc.
I need some conformtion of a power calculation.
If a resistor [R] is droven by a sinusoidal current source that at time zero is
i = Asin[wt]
and "A" decreases to zero linearly, what is the RMS Power.
This is not a home work assignment, this is an approximation of the current waveform I'm...
Here's another question directed at the Math Gurus. Copper windings are often hit with short bursts of current far above their continous rating. The question is how long can that power burst be applied and not exceed the magnet wire varnish temperature rating.
To get a limiting case, one can...
This question is sort of motor related (X Axis servo ramping profile) but I put it here because I hang out here a lot and there are a bunch of calculus "Geeks" who hang out here.
We have a lens polisher that spins a lens slowly and a fast spinning polishing ball is loaded against the lens. The...
I use to purchase high speed induction motors from a German Company called E and A (E und A). I believe they were purchased by someone. Does anyone know who?
Seen in a trade magazine. There have been several threads on this subject.
http://www.ips.invensys.com/en/products/autocontrols/Pages/ControlSystemMigration-P025.aspx
I guess I have always assumed that one could purchase deep groove radial bearings with an initial preload. And I said so in a design meeting. Then looking at an SKF catalog, I don't see how to specify this. I'll call SKF Monday but I thought I'd ask here this weekend to see if I'm just...
In recent threads, EN61800-3 has been said to allowed different categories of radiated emissions. Could someone give a brief summary of the categories and the levels of radiated emissions allowed.
