This one is a tough one. My H did the same thing for awhile. Until there is something legal or that you 2 have sat down and discussed, a visitation schedule, you can't MAKE him. You can ask to meet with him and discuss and schedule and go from there!
His relationship with his D's is up to him...
Your H sounds like he is in MLC!
M48 H53 M16 T18 S16 D13 SS30 H drops bomb PA/8-30-09 H leaves 12-30-09 D filed by H 2-10 H asks to come home 4-11 Piecing