hello ! hope you’r all doing well. I bought an old machine and this beauty works with post processor Heidenhain TNC 426. On sheetcam there is the 530 and the 410 and the 410 conversational Is it compatible ?
Thanks for all your answer ! 
Jules, welcome to sheeetcam.
I believe it will be best if you contact the Heidenhain company to inquire for that advice.