Hi,
probably didn't put that well. Most CNCers would say that they don't come better than Geko, no doubt there are some superb
and expensive brands out there but in the Mach world Geko is the by-word for quality.
The G540 is a combined device, it has 4 built in stepper drivers and IO amps to match one PP. I've seen it advertised for just under
$300 US which is good value for it quality and therefore VERY popular amongst CNCers. The G540 has an upper voltage limit of 50V,
which is good for most purposes but Gekos other models G203, G213 etc have 80V capable drivers. The higher voltage allows you to
drive your steppers faster at reasonable torque. Stepper motors are very poor at high speed and any and every effort is usually expended
to improve them at speed and still remain cheap. The G203s etc are a single driver, ie you require one for each axis and also a BOB
and therefore costs more than a single G540 so you pay quite a premium for the extra speed.
If you are 'made of bucks' and/or really need your machine to whizz around to make money then you need genuine servos. Some of the
cheapest crappiest servos are the same price as a good stepper and drive but any midway-to-good servo and amp is way more expensive
than a stepper and drive.
Craig