Reply to thread

Message

<blockquote data-quote="Vipersan" data-source="post: 786360" data-attributes="member: 325666">Hi friends ..This is what I mean about laser accuracy ..This is the tool I made to substitute for the lnb during alignment..A small battery powered laser insert centred in what was once the top off a can of spray paint ..Accurately positioned and held in place by 2 x plastic inserts front and back ...Sadly only acurate to within 1.5 inches over 1.5 metres ..The reason ..The laser led is not fitted in the brass encasement centrally ..and so the beam wanders by something like 2 inches over 2 metres ..Its good enough for using as a rough guide ..and for adjusting the 3 springs holding the lnb plate ..and watching the shift of the laser spot ...but it lies as to the actual centre point ...as this can be 1.5 inches out at the dish centre.I've tried many laser pens and inserts ...they ALL exhibit the same inaccuracy ...my guess is positioning of the laser diode within the lense ..or the lense itself encasing the diode is distorted.For pointing at a blackboard ..this isn't an issue ..For alignment ...it is..btw ..you can prove this for yourself if you have a pen or cylindrical laser mounted in a pen ..switch it on and place it on the floor ..note the point it makes on the skirting board ...then roll it accross the floor switched on ...and watch the spot it produces ..rise and fall up the skirting board or wall ..rgdsVS</blockquote>

[QUOTE="Vipersan, post: 786360, member: 325666"] Hi friends .. This is what I mean about laser accuracy .. This is the tool I made to substitute for the lnb during alignment.. A small battery powered laser insert centred in what was once the top off a can of spray paint .. Accurately positioned and held in place by 2 x plastic inserts front and back ... Sadly only acurate to within 1.5 inches over 1.5 metres .. The reason .. The laser led is not fitted in the brass encasement centrally ..and so the beam wanders by something like 2 inches over 2 metres .. Its good enough for using as a rough guide ..and for adjusting the 3 springs holding the lnb plate ..and watching the shift of the laser spot ... but it lies as to the actual centre point ...as this can be 1.5 inches out at the dish centre. I've tried many laser pens and inserts ...they ALL exhibit the same inaccuracy ...my guess is positioning of the laser diode within the lense ..or the lense itself encasing the diode is distorted. For pointing at a blackboard ..this isn't an issue .. For alignment ...it is.. btw ..you can prove this for yourself if you have a pen or cylindrical laser mounted in a pen .. switch it on and place it on the floor .. note the point it makes on the skirting board ...then roll it accross the floor switched on ...and watch the spot it produces ..rise and fall up the skirting board or wall .. rgds VS [/QUOTE]

Verification