No, you can't. Again, we are talking about inductive load. Also, the load is not constant, like when you switch on a lamp, but is high when a step pulse is given and low in between. So, the reading you get is false because it shows an average at best, assuming your simple DC amp meter can cope with the frequency of stepping, which is by far the case for simple and cheap amp meters.
I have an amp meter permanently wired to the PSU on the 43V side, now when the machine is in idle, the motors are disabled, the current reading is 0.1A, when the motors are enabled the reading jumps to 2A, and when the driver lowers to holding current it reads 1.6A, after a second it drops to 1.2A. This is fine, but like I said, it is not the real current when the motors are running, only when the motors are not running. Here is a short video I just made if you want to watch it, you can see what is happening.
https://youtu.be/m1zxi-BjIhc
Note that current will increase even more once cutting starts.