Recent content by ahrouhi

Dear NVN. i don't understand why u use 36 in p1(better to say f1) calculation and 70 in p2(f2) calculation. menwhile the L= length of yellow pin is not 18, its 10+1.5+1.5=13 and yallow pin width a=3.3 mm. am i right? or we have to calculate the slot size in formula instead of pin size. and...

Dear nvn please note to attached picture. actually the pinch bar shape is not rounded. they are in oval shape. please inform me if i want to use a pinch bar for each hole(totaly 3 pinch bar), would you guide me how to calculate?

please send me some more circutes for designeing PWM . and let me know haw to calculate the frequency to adjust my motor speed from 2700 to 2100?

i am eagerly waiting

if the picture is not clear please let me know.

thanks, i found many good information in wikipedia. but still waiting for your guidances. experience is precious and i respect to your experience and eager to hear that.

i attached a proper picture for better understanding my problem. please answer.

many thanks for your suggestion of using PWM. would you please guide me how to calculate the specification of PWM? our DC motor normal speed (normally is high) is 2700 RPM. for reduction to 2200 RPM what should be the parameters or specifications of PWM? (1 khz rectangular wave would be...

Dear friend. in industry we should consider many things such as price, durability... i am very eager to know that using an electronic board for PWM ,on our project , in compare with the traditional method, using resistor,is economical or no? presently we should consider about 1.5 $ for resistor...

would you explain more about PWM? i am nat familiar with that.

I am working in an Auto Parts manufacturer company which one of its production is DC motors used in different wheicles. I have two type of question about a DC motor : 1: we have a new model DC motors which get too hot. what's the reason? what does the effect of the thickness of cooper wire...

first of all please accept my apologize for latency in reply. please note to the picture: the tube and the sqeezing area and the pivot housing which should be attached to both end side of tube are shown. the yellow part of pivot housing would be inserted in tube and the red part on pivot...

Dear nucleus many thanks for your solution. your method is applicable. but i wanted to use formula and then investigate the subject in action. i wait for your new suggestions too. dear dingpud i am on mission, at first time i got office , i send picture, but as i am new in this forum , i...

i am still waiting for your guidance.,,,,

I know the formula for yield strength : p=2.Y. ((D/t)-1) / (D/t) pow2 The resault is 19 N/MM2 . it seems this formula is not correct for my purpose. whats your idea?