Re: [Emc-users] PWM vs. analog input servo amplifiers

2017-03-01 Thread Jon Elson
On 03/01/2017 07:58 AM, dragon wrote: > What are the advantages and disadvantages of using PWM input vs. analog > input servo amplifiers? Simpler, no DAC on the control, no analog input circuitry on the servo amp. No drift when the servo amp is enabled but the LinuxCNC positioning loop is "off".

Re: [Emc-users] PWM vs. analog input servo amplifiers

2017-03-01 Thread Nicklas Karlsson
> What are the advantages and disadvantages of using PWM input vs. analog > input servo amplifiers? Electrical noise. It is usually possible to generate and sample flanks width the accuracy of the clock. -- Check out the

[Emc-users] PWM vs. analog input servo amplifiers

2017-03-01 Thread dragon
What are the advantages and disadvantages of using PWM input vs. analog input servo amplifiers? Unless I am mistaken, it looks like it is easier to drive the PWM input ones as they can be driven directly off of something like a Mesa 6i24 without the need for the additional analog interface card. I