Anyone using CNCdrive products?

[JAZZCNC]

Looking at Linux cnc, is this compatible with MACH3 products, or do I need parts specifically for Linux cnc?

Could I buy the CNCdrive setup, load Linux cnc on my pc and it integrate together, or do I need to do a bit more setting up of the system?

Yes and No. Most drives and BOBs will work with Both. But External Motion control cards like Uc300 or Cslabs, ESS etc use a dedicated software plug-in that will only work with Mach3. Obviously Uc300 will work with UcCnc as well.
That said because Linux Cnc is real time Kernal then it doesn't need a Ex Motion control card. What you may need however is More I/O so you'll use what called Mesa cards to provide this.
Linux is a very Good cheap option if your prepared for a steep learning curve and to search for Info etc. It isn't has well supported has Mach3 with as wide user base but often those who do support it are quite knowledgable I believe. I'm not into Linux Cnc so that's far has I can help on that i'm afraid. It's certainly got far wider user base and support than UcCnc thou.

Now Just something to be aware of with Uc300 and some of the Cheaper Ex motion control cards when used with Servos.? There Frequency is low. Often Maxing at 100 or 125Khz. This means with 2500ppr encoder you will be limted to the Max speed you'll get from the Servo motor.
Common rpm for servo is 3000rpm but with only 100Khz and 2500ppr encoder you'll never get that speed and your Max speed will be 600rpm.!!
To get your full 3000 rpm and keep all the resolution your 2500ppr encoder provides you'll need frequency of 500khz.
You can still use Uc300 and get the full 3000rpm provided the Drive allows electronic gearing. This will however come at the cost of Encoder Resolution.

This why CncDrive will use 1000ppr Encoders as the overhead is much lower on there Ex Mo card. Even then for 3000rpm you'll need 1:2 E-Gearing so encoder count is actually 500ppr.!!

Cslabs and Ess for instance have 4Mhz Frequency limit which is well on top of the job.!

More to this Cnc malarky than often realised.. .