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Take a look at this article about flat belt pulley crowning: Flat belt tracking on pulleys.
You should be able to crown the lower pulley easily with a mill file will the motor is running or take it to a machine shop and have it turned on a lathe.
Happy sawing!
ballast fluorescent lamps+transistor type
Kip:
Finally got around to reading the patent, too many other things in the way :(
In the text, a NPN transistor 2N3055 is mentioned along with a few other components and some of their values.
How did the repair job turn out?
Tanuki
d882 ballast
Kip:
"I'd be interested if your program can suggest an NPN transistor by number"?
No, Micro-Cap is circuit simulator (SPICE); the user has to select the specific components from a limited library or make their own SPICE model of a part.
I think many NPN transistors will work...
cfl schematic why they fail
Kip
Thanks for the pointer on the patent, I didn't read it just looked at the pictures ... 20KHz will be my target frequency then.
One other thing, when the lamps fail are they operating or do they fail to start.
If they were operating then it was most likely...
transistor marking kip
Great, the new photos take all of the guessing out of it. Backlighting worked really well. I've got the circuit completed now.
The NPN transistor pinout is Pin 1: Base, Pin 2: Collector, Pin 3: Emitter. The emitter is connected to white wire (i.g. ground). Collector to...
transistor role in cfl pcb
Found this patent issued to Thin-Lite for a switchable two lamp system which has the schematic for your PCB. There are several unloaded components on the PCB and most likely this schematic is the full monty. From what I've reversed so far, it looks nearly identical...
85 watt fluorescent ballast schematics
Kip:
Sorry to be delayed so long, I had to repair a friend's computer that had a bad hard drive controller.
I started reversing the PCB today and I need some help.
I'm creating a micro-Cap simulation scehmatic. Once we get all of the parts and...
thinlt
Ah! "REC" is on the reverse side of the printed circuit board and "REC" is also on the transistor.
The maunfacture has private labeled all of the parts to their own code. I found Thin-Lite in California and this is their website where they offer new ballast: **broken link removed**...
Here is a free tool for trace currents: TrAMP V1.1
You will need to use multiple via where large currents change layers: https://www.ultracad.com/articles/viacurrents.pdf
Other free tools:
**broken link removed**
https://www.ultracad.com/calc.htm
kip hansen floursecent ballast
I found some cross referencs to IR parts.
It could be IRFR9024N.
http://search.digikey.com
Your local wiz-guy should be able to tell between a bipolar transistor and a FET with only a DC volt-meter. If he has an oscilloscope then even better.
If you...
dc-dc inverter 4kw
Ok, EV motor control.
Regardless of the SMPS topology, the SMPS must be bidirectional, i.e. able to move power in either direction, to the load or from it.
Most SMSP topologies can be converted to bidirectional operation so Full Bridge is not the only solution. It is a...
step up dc dc converter
There was perviously no mention of a motor control.
Is there regenative braking?
You need to specify more completely what you need and want help for.
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