my first plasma build

[oadamo]

Hi Adam,
are you using adjustable bearings to take up any play in the frame? Also if you are going to use chains for the drive you will need to install an idler some where to take up the play or you will have huge amounts of backlash. Is this going to be a ,ingle side drive or twin side drive?

Regards

Ian

hi ian
the bearing are fixed type but i have sloted the holes in the side plates so i can slide them up to the box section, i was surprised at how tight i could get them to take the play out o the gantry. and because the top of the gantry is fixed with the welded bar for the gun to run on i have fitted a bar on the bottom between the plates so i can pull the bottom of the plates in a couple of mm to get the side bearing nice and tight on the box section.
iam going to use twin chains on the main bed with a spockets each side with the chain fixed to the gantry, and the drive in the middle so it should keep the gantry nice and level. but for the gun holder on the gantry iam going to use a single chain because of the room factor and its a lot lighter with just the gun on it.
backlash ????? i havent got a clue lol, i have a load of spockets but no chain i was going to buy some and test to see how much backlash the chain has then put the spockets the best way to minimize it.
adam