I am building a Y axis using this motor but it now looks like the object its carrying is too heavy, all I want is a manufacturer who actually gives a datasheet with these motors so i can look at the torque on the motor shaft and relook at the screw pitch and all, problem is I seem to find motors but no datasheet!!!
would be brilliant if someone could suggest a manufacturer who sells and also provides a datasheet.
also has any one used these type of steppers before?? they seem to be same dimensions as the ones in the above link but perhaps with a bit more torque available. any one who has anything to say about these and perhaps a matching driver?
These gadgets seem to be made mostly for opening and closing dvd drives. They are made for single specific applications and not for general purposes. That is why there is no datasheet.
Hi Mich , point noted :D, although people are selling these all over the internet .. I was just hoping if there was someone who actually bought one with a datasheet.... but thanks anyways for taking time to respond!
anyone else on this forum who has experience with either of the two of motors in the earlier links and could share their knowledge please.
I am building a Y axis using this motor but it now looks like the object its carrying is too heavy, all I want is a manufacturer who actually gives a datasheet with these motors so i can look at the torque on the motor shaft and relook at the screw pitch and all, problem is I seem to find motors but no datasheet!!!
would be brilliant if someone could suggest a manufacturer who sells and also provides a datasheet.
also has any one used these type of steppers before?? they seem to be same dimensions as the ones in the above link but perhaps with a bit more torque available. any one who has anything to say about these and perhaps a matching driver?
Bstanko6 , I found this datasheet for a company you linked , checked their site for the same model but they don't have the product in their catalog, I have emailed them asking if they still make it and would want to sell it .. but top effort mate ! thanks a lot.
I am after external linear actuator type and looks like other websites either have captive or non captive ones so Minebea is the way to go for now guys.
Polymorph, I am trying to use these motors ( attached) to move a vertical load.
It appeared during the test run that the motor moving load vertically upwards is struggling to move at all. ( it clogs but if you give it tad of a push it does what it needs to)
The existing set up was made by hacking some computer parts and in which case I didn't know what the motors or the drivers ratings etc were and hence I was trying to find any data sheets that I could use to check and compare some calculations.
I found the datasheet attached here, that gave me something to work with also found this great link MYCNCUK on how to size the motor.
Once I have sized the motor properly for rated load I will match it to a better driver.(I believe the existing driver in floppy drives and DVD drives limits the current to a value that doesn't provide enough power for motor to move load upwards .. which makes sense as these motors are meant for horizontal motion and not vertical movements and that too with an attached load) and build it again.
If you guys go through the link on motor sizing and have any suggestions or ideas or want to check something let me know, I am working on the same sheet so might be able to check results and all.
I am looking at a weight of 400grams, with max linear speed of 600mm/min where the motor revs of 1200rpm(as per earlier motor datasheet). The accelerating torque for given inertia came out to be 12.8X10^-5Nm (from earlier excel sheet).
The screw length is 10mm(attached motor data sheet) so not completely sure if i would actually require a linear speed of 600mm/min or something less would be far sufficient.
If the acceleration torque is that low its insignificant - bearing friction will be larger.
The best approach to determining torque is measure it, if you have all the mechanical
parts set up, since then you get to include all the friction losses. Failing that you can
calculate the torque to move the load plus the torque to accelerate, add them and multiply
by a safety margin.
Steppers do not have a well behaved speed/torque curve, unlike DC motors, so looking
at the actual curve in the datasheet is really useful, but that curve itself depends on
the circuitry and voltage used to drive the motor...
Thanks for taking interest, you mentioned ,measure the torque .. How can I do this ? Some sort of a torque sensor ?.. Also the shaft looks non lubricated , perhaps another reason why static frictional force is large in this case ? What would the recommended lubricant for lead screw type shaf would be .. Would a motorbike chain lube be ok..