rambinator Posted February 13, 2007 Report Share Posted February 13, 2007 hi there!I have problems with the mf's (alps) and the MBLC i am currently working on:The faders are connected correctly, the touchsensors are not connected yet.The mf_directcontrol lets me test the faders correctly. i press a button, fader moves, fader stops.When i try the calibration tool, moving one fader doesn't work to move the others, they just move some milimetersoccasionally. I am using a voltage of 7,5 but allso tried higher. When i load the LC 1.6 app and use a daw with it the faders drive to their limit and still "struggle" to move further.that makes the ic's get hot very quickly. when i move a fader in the software the MF also moves but it doesnt stop at the place where it should, it just moves on slowly to the other and and "drives against the wall" again. i am quite clueless about what could be going on. btw: my psu is sais it can supply 2A on the 12V rail, so that shoudlnt be a problem i guess (didnt measure for voltage drops)cheers,rambinator Quote Link to comment Share on other sites More sharing options...
TK. Posted February 14, 2007 Report Share Posted February 14, 2007 Hi,I remember, that somebody else had similar problems with a switching power supply. What kind of PSU are you using, and does the v_mf voltage change when a fader is moved?Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
rambinator Posted February 15, 2007 Author Report Share Posted February 15, 2007 hi thorsten!I am using this psu:http://www.exclaim.de/tests/artikel/212_1/Externes-Universal-Netzeil.htmlso far i didnt see any voltage drops when i move 2 faders at the same time (this is what i tried):if i set a lover mf_voltage so that the faders barely move they still try to slowly move to the bedstop.as i said this doesnt happen with the direct control application.some other issue that i found out about yesterday. so far i had been using a 10k pot to regulate the mf_voltage (as i didnt find another one). it was very painfull to really hit the right value with it. so i got a 1k pot like in the schematics, yesterday. the weird thing is that i cant go further than mf_v: 6,8V with it. does this mean that some other parts of my circuit are out of spec? Quote Link to comment Share on other sites More sharing options...
rambinator Posted February 15, 2007 Author Report Share Posted February 15, 2007 i just tried with a good lab psu and it doesnt change anything. i also installed another resistor to have exactly 7,5V mf_voltage. what i really find weird is that in the calibration app nothing moves at all, not even the slightest bit and with LC the faders drive crazyedit: problem seems to be partially solved. the calibration app couldnt read the positions properly due to a defunct connectionedit2: problem seems to be almost completely solved: bad dont trust jumpers to give you a good connection!something else now: is there something i can do so that all faders have the same position when the software sets them to 0db or unity gain? Quote Link to comment Share on other sites More sharing options...
seppoman Posted February 15, 2007 Report Share Posted February 15, 2007 if i set a lover mf_voltage so that the faders barely move they still try to slowly move to the bedstop.Has this got something to do with sex? ;D :PSorry, couldn´t resist :)Seppoman Quote Link to comment Share on other sites More sharing options...
rambinator Posted February 15, 2007 Author Report Share Posted February 15, 2007 yeah, it is called electrosex. you put electrodes on your testicles... Quote Link to comment Share on other sites More sharing options...
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