Chassis mount current sense:
Typ Thru hole:
there's two pages of results..
Andrew wrote:
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Another suggestion is to use Nichrome wire and make the resistance whatever you need. Nichrome wire is what is used to make wire wound resistors.
I have some and am willing to mail you a few cm/inches to try.
Cheers,
Andrew in Melbourne
On 05/02/13 07:21, alex4459jopiklal44 wrote:
--- In 7x12minilathe@... <mailto:7x12minilathe%40yahoogroups.com>, "alex4459jopiklal44" wrote:
I agree , either use a 0.022 or 4 in parallel .
If you look at the schematic, you will see that all curent drawn is
going through this resistor, and an opamp are then measuring on the current ..
The only thing that could happen is that the motor draw a bit more
before the regulator cutt out.
it would be close to 12 percent more..if they are spot on value..
therefore choose 5% or better ,in tollerance.
to be on the safe side, you could choose a 0.033 .,but if there is
room for 4 , maybe 2watt then I would choose this solution with four 0.1 R
alex
I think ,now after looking at the schematic again, that it is best to get as close as possible to the original value,,that is 4 times 0.1 ohm parallel = 0.025 ohm ,as said from others.
there is a CL adjust in conection to the resistor ,guess this is current limit..it look as it turn the regulation to zero when max current is exceeded.. There are another path through an adjustment marked IR ,witch I think is current- regulation.. it end at the same point where the speed potmeter goes. so it must be a regulation to keep the moment steady ,when motor is loaded..
alex
