add some content on common problems
add some content on common problems

jaguarcat79/ILC-with-LinuxCNC,bobvanderlinden/machinekit,bobvanderlinden/machinekit,narogon/linuxcnc,Cid427/machinekit,araisrobo/linuxcnc,strahlex/machinekit,bobvanderlinden/machinekit,bobvanderlinden/machinekit,yishinli/emc2,unseenlaser/machinekit,jaguarcat79/ILC-with-LinuxCNC,ArcEye/MK-Qt5,RunningLight/machinekit,mhaberler/machinekit,unseenlaser/machinekit,cdsteinkuehler/linuxcnc,kinsamanka/machinekit,unseenlaser/machinekit,EqAfrica/machinekit,ArcEye/MK-Qt5,ianmcmahon/linuxcnc-mirror,bobvanderlinden/machinekit,yishinli/emc2,cdsteinkuehler/linuxcnc,aschiffler/linuxcnc,ArcEye/machinekit-testing,mhaberler/machinekit,EqAfrica/machinekit,RunningLight/machinekit,RunningLight/machinekit,mhaberler/machinekit,jaguarcat79/ILC-with-LinuxCNC,unseenlaser/machinekit,araisrobo/linuxcnc,ArcEye/MK-Qt5,ArcEye/machinekit-testing,strahlex/machinekit,ikcalB/linuxcnc-mirror,strahlex/machinekit,EqAfrica/machinekit,yishinli/emc2,RunningLight/machinekit,narogon/linuxcnc,araisrobo/machinekit,bmwiedemann/linuxcnc-mirror,kinsamanka/machinekit,RunningLight/machinekit,unseenlaser/machinekit,RunningLight/machinekit,cnc-club/linuxcnc,mhaberler/machinekit,ArcEye/machinekit-testing,unseenlaser/linuxcnc,ArcEye/machinekit-testing,EqAfrica/machinekit,Cid427/machinekit,mhaberler/machinekit,ikcalB/linuxcnc-mirror,cnc-club/linuxcnc,cdsteinkuehler/linuxcnc,ArcEye/machinekit-testing,Cid427/machinekit,cdsteinkuehler/linuxcnc,mhaberler/machinekit,RunningLight/machinekit,ianmcmahon/linuxcnc-mirror,araisrobo/machinekit,ikcalB/linuxcnc-mirror,araisrobo/machinekit,araisrobo/machinekit,cdsteinkuehler/MachineKit,unseenlaser/linuxcnc,strahlex/machinekit,kinsamanka/machinekit,ikcalB/linuxcnc-mirror,ArcEye/MK-Qt5,jaguarcat79/ILC-with-LinuxCNC,Cid427/machinekit,aschiffler/linuxcnc,ianmcmahon/linuxcnc-mirror,cnc-club/linuxcnc,ikcalB/linuxcnc-mirror,jaguarcat79/ILC-with-LinuxCNC,strahlex/machinekit,cnc-club/linuxcnc,Cid427/machinekit,araisrobo/machinekit,yishinli/emc2,bmwiedemann/linuxcnc-mirror,cdsteinkuehler/MachineKit,unseenlaser/linuxcnc,cdsteinkuehler/linuxcnc,cnc-club/linuxcnc,ikcalB/linuxcnc-mirror,kinsamanka/machinekit,ArcEye/MK-Qt5,ArcEye/MK-Qt5,unseenlaser/linuxcnc,ianmcmahon/linuxcnc-mirror,araisrobo/linuxcnc,cdsteinkuehler/linuxcnc,kinsamanka/machinekit,ianmcmahon/linuxcnc-mirror,ArcEye/machinekit-testing,mhaberler/machinekit,ArcEye/machinekit-testing,EqAfrica/machinekit,EqAfrica/machinekit,narogon/linuxcnc,araisrobo/machinekit,araisrobo/machinekit,cdsteinkuehler/MachineKit,kinsamanka/machinekit,strahlex/machinekit,aschiffler/linuxcnc,ArcEye/MK-Qt5,aschiffler/linuxcnc,cnc-club/linuxcnc,narogon/linuxcnc,mhaberler/machinekit,narogon/linuxcnc,strahlex/machinekit,araisrobo/linuxcnc,araisrobo/linuxcnc,Cid427/machinekit,unseenlaser/linuxcnc,unseenlaser/machinekit,bmwiedemann/linuxcnc-mirror,Cid427/machinekit,bmwiedemann/linuxcnc-mirror,araisrobo/machinekit,unseenlaser/machinekit,aschiffler/linuxcnc,cdsteinkuehler/MachineKit,bobvanderlinden/machinekit,bmwiedemann/linuxcnc-mirror,kinsamanka/machinekit,Cid427/machinekit,ianmcmahon/linuxcnc-mirror,ikcalB/linuxcnc-mirror,ArcEye/machinekit-testing,bobvanderlinden/machinekit,RunningLight/machinekit,ianmcmahon/linuxcnc-mirror,bmwiedemann/linuxcnc-mirror,ArcEye/MK-Qt5,EqAfrica/machinekit,araisrobo/machinekit,cnc-club/linuxcnc,cdsteinkuehler/MachineKit,bmwiedemann/linuxcnc-mirror,unseenlaser/machinekit,kinsamanka/machinekit,bobvanderlinden/machinekit,cdsteinkuehler/MachineKit,EqAfrica/machinekit