>I have this code Lines
>set printer on
> SET PRINTER TO default
> SET DEVICE TO printer
> @1,10 say 'Super Tienda Gloria'
> @2,7 say 'Centro Comercial MANLOP'
> @3,10 say 'Salamá Baja Verapaz'
> @6,1 say 'Factura ' +ALLTRIM(cajas.serie_facturas)+' '+ALLTRIM .transaccion)
> @7,1 say 'Cliente '+ ALLTRIM(facturas.nombre)
> @8,1 say 'Nit '+ALLTRIM(facturas.nit)
> @9,1 say 'Dirección '+ALLTRIM(facturas.direccion)
>
>but the printer not respond inmediatly
>i has configured the com1 port to print directly to the printer
>becouse is a TM-U200a but not respond

I would suggest looking at the OPOS controls for working with your TM-U200a. You can find more information at http://pos.epson.com/pointofsale/opos.shtml.