Modifications

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The MP6500 driver IC has a maximum current rating of 2.5 A per coil, but the actual current you can deliver depends on how well you can keep the IC cool. The carrier’s printed circuit board is designed to draw heat out of the IC, but to supply more than approximately 1.5 A per coil, a heat sink or other cooling method is required. Note that the version of this board with digital current control has a maximum current limit setting of around 2 A.

La puce MP6500 sur le contrôleur est prévu pour un courant de 2.5 A par bobine mais le courant qu'il est vraiment capable de contrôler dépend surtout de votre capacité à refroidir le circuit intégré. La carte est conçue pour extraire un maximum de chaleur du circuit intégré mais il sera cependant nécessaire d'utiliser des refroidisseurs ou autre refroidissement actif dès que le courant dépassera 1.5A par bobine.  

{{ambox-stop|text=This product can get ***HOT*** enough to burn you long before the chip overheats. Take care when handling this product and other components connected to it.}}

{{ambox-stop|text=Ce produit peut devenir assez ***CHAUD*** pour causer des brûlures bien avant que la protection contre la surchauffe ne soit déclenchée. Il faut donc manipuler le produit (et composants qui y sont raccordés) avec grand soin!}}

{{underline|Please note that measuring the current draw at the power supply will generally not provide an accurate measure of the coil current}}. Since the input voltage to the driver can be significantly higher than the coil voltage, the measured current on the power supply can be quite a bit lower than the coil current (the driver and coil basically act like a switching step-down power supply). Also, if the supply voltage is very high compared to what the motor needs to achieve the set current, the duty cycle will be very low, which also leads to significant differences between average and RMS currents. Additionally, please note that the coil current is a function of the set current limit, but it does not necessarily equal the current limit setting as the actual current through each coil changes with each microstep.

{{underline|Please note that measuring the current draw at the power supply will generally not provide an accurate measure of the coil current}}. Since the input voltage to the driver can be significantly higher than the coil voltage, the measured current on the power supply can be quite a bit lower than the coil current (the driver and coil basically act like a switching step-down power supply). Also, if the supply voltage is very high compared to what the motor needs to achieve the set current, the duty cycle will be very low, which also leads to significant differences between average and RMS currents. Additionally, please note that the coil current is a function of the set current limit, but it does not necessarily equal the current limit setting as the actual current through each coil changes with each microstep.