A friend has a dubplate cutter. It is a disk cutting lathe that fits over a standard turntable and cuts into plastic instead of lacquer disks.
In professional disk cutting lathe electronics the current draw of the cutter head is monitored. This is as important to monitor as the audio level. It has a great bearing on the distortion on the disk.
The dubplate cutter my friend has uses a standard PA type amplifier to drive the cutterhead. There is no provision for a current meter.
I would like to know what the best way to add a current meter to the speaker outputs of the power amplifier is. Is it okay to put a mechanical AC current meter in series with the power amplifier outputs? Do I need to do some kind of shunt arrangement?
The meter should read 2A full scale.
In professional disk cutting lathe electronics the current draw of the cutter head is monitored. This is as important to monitor as the audio level. It has a great bearing on the distortion on the disk.
The dubplate cutter my friend has uses a standard PA type amplifier to drive the cutterhead. There is no provision for a current meter.
I would like to know what the best way to add a current meter to the speaker outputs of the power amplifier is. Is it okay to put a mechanical AC current meter in series with the power amplifier outputs? Do I need to do some kind of shunt arrangement?
The meter should read 2A full scale.