Hi,

Is there another choice for THC to use with the SmoothStepper ESS other than the WarpRunner?
Not with anything like the functionality or the bandidth of the WarpRunner. It has Anti-Dive strategies which no other ESS ready controller has.

Mach4 does have a software driven THC facility, but low bandwidth, say 5Hz, maybe 10Hz. So if you only require low dynamic THC then you should investigate that. You in effect need
a ADC to convert the tip voltage (or sample thereof) to drive Mach4's THC module.

The Proma 150 is another alternative. It does not do ADC, but makes an Up/Down signal based on the threshold you dial into the Proma. Downside is no Anti-Dive, and because Mach4
has no idea of the tip voltage (in absence of an ADC) and therefore little or none of the Mach4 THC module will be of any use to you.

Look at the knighthawk controller.
Does the Nighthawk support THC? Does it have analogue inputs or does it require an ADC? What bandwidth is the THC? Does it have Anti-Dive strategies? Have you actually tried it or
have reports from those who have?

Craig