Lmd18200 t motor driver

Dear sir,

My name is Ketan

I had made one DC motor driver project using lmd 18200 t ic with arduino mc.  My program is so simple and working fine. My motor is brushed 24 v DC .

Program is motor fwd and reverse  control by two buttons no nc type. Pwm is only 10 period of 5 sec.

Motor rotate fine but with ought load.

If I putting on belt. Tensions it can not rotate.

Pls suggest me the solution

Thanks