<?php

namespace RadDB;

use Illuminate\Database\Eloquent\Model;

class MachineSurveyData extends Model
{
    use SoftDeletes;

    /**
     * The table associated with the model.
     *
     * @var string
     */
    protected $table = 'machine_surveydata';

    /**
     * Attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'machine_id',
        'survey_id',
        'gendata',
        'collimatordata',
        'radoutputdata',
        'radsurveydata',
        'hvldata',
        'fluorodata',
        'maxfluorodata',
        'receptorentrance',
    ];

    /**
     * Attributes that should be mutated to dates.
     *
     * @var array
     */
    protected $dates = [
        'deleted_at',
        'created_at',
        'updated_at',
    ];

    /**
     * Relationships
     */
    public function machine()
    {
        return $this->belongsTo('RadDB\Machine');
    }

    public function survey()
    {
        return $this->belongsTo('RadDB\TestDate');
    }
}

<?php

namespace RadDB;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

class MachineSurveyData extends Model
{
    use SoftDeletes;

    /**
     * The table associated with the model.
     *
     * @var string
     */
    protected $table = 'machine_surveydata';

    /**
     * Attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'machine_id',
        'survey_id',
        'gendata',
        'collimatordata',
        'radoutputdata',
        'radsurveydata',
        'hvldata',
        'fluorodata',
        'maxfluorodata',
        'receptorentrance',
    ];

    /**
     * Attributes that should be mutated to dates.
     *
     * @var array
     */
    protected $dates = [
        'deleted_at',
        'created_at',
        'updated_at',
    ];

    /**
     * Relationships
     */
    public function machine()
    {
        return $this->belongsTo('RadDB\Machine');
    }

    public function survey()
    {
        return $this->belongsTo('RadDB\TestDate');
    }
}

Add missing use statement for SoftDeletes
Add missing use statement for SoftDeletes
