You worry a lot about heat from stepping motor driving part and stepping motor?

First, please check followings. Even if the specification of stepping motor is 5V, please use 24V in rated voltage for our stepping motor controller. Stepping motor is usually supplied the voltage 3~8 times higher normal specification to drive. And, AM-CS2P and AM-MS2, our stepping motor driving parts is intended to start operating from 10V in idle condition in respect of specification and use 24V in rated voltage. If torque is low, stepping motor works well just if the sufficient current is supplied to 12V.

Even if so, stepping motor driving part will generate 24V inside it. But, you had best supply 24V because heat can occur due to efficiency for voltage conversion. If current is not sufficiently supplied, voltage becomes unstable with motor driving part leading to heat. The reason that current is not sufficiently supplied is the specification of SMPS which supplies the current to motor driving part does not supply the current sufficiently or SMPS has a fault.

Please note that SMPS doesn’t often conform to real specification even if marked specification of SMPS is sufficient. Our stepping motor driving part is allowed to use up to 3A but, you need to add heat sink if the current is more than 1.5~2A. For maximum specification, each motor requires different specification of SMPS, but you had better use SMPS with approx. 24V 100W a motor which is available up to DV 24V 5A.

However, please note that consuming current of each motor is different. If you operate loading the motor driving part, operate the variable resistance in the center of motor driving part and adjust to the suitable bias so that a proper torque outputs. If you handle this process properly, motor driving part and motor will have less heat.  How many voltages do you supply to step motor driver as voltage for motor? The driver will operate provided that approx. 12V must be applied at least and the current is also different depending upon torque but the requirement is as stated above.  

For your information, in case of small line-tracer, SMPS with approx. 12V 1A can cover. 24V 100W SMPS for driving stepping motor is also available at NEWTC. If you need it, please contact us.

In addition to, please note even if using SMPS with sufficient specification, the current cannot be supplied sufficiently if cable from SMPS to motor driving part is too thin and thus motor driving part can have heat caused by the same problems. It is very important that you should use the cable with thickness for current enough to run.

Thank you.