Hello @Ed-Hovsepyan
Make sure you are assigning the correct ZONE to modelspace.
Once you know your zone, you can use MAPCSASSIGN command=>In Search box enter 'LL84'=>Scroll to your zone=>Click Assign button.
Do you run Google Earth Pro. If you already have it you can use it to verify the correct zone. If you don't, you can download it for mobile or desktop, it's a free download.
1. On the menu bar go to Tools=>Options........then do like image-1.
Image-1
2. Next, on menu bar go to View=>Grid and check the Grid box. See image-2.
Image-2
3. Your map will display the UTM grid with white lines. You can zoom-in, zoom-out and pan. The gird will adjust to the zoom level and panning because Google Earth Pro is interactive. The grid will stay ON until you uncheck the grid box.
Image-3
Chicagolooper
