batmaster wrote:

When i print PLA i run the bed at 0.  Pla doesnt require a heated bed and it normally just screws things up.  Also you really need a layer fan for overhangs, the material needs to set quickly.

If you are over or under extruding you can change your steps on your repetier firmware right on the printer, the default is 99, i had to set mine to 95, i was getting way to much material making lots of blobs.

It wont stick if I turn off the bed and I dont want to print on tape. Thanks for post.

Actually if you look at any high end PLA printer such as Makerbot, they all print on an unheated bed and use blue painters tape. There is nothing wrong with it and it is very common and dependable. What you want. or don't want, and what is standard procedure may not always be the same thing.

Now if you insist on not using tape, then you can make sure your bed is adjust to about a .15mm gap, use Elmers purple glue sticks or Kapton tape. PLA sticks well to hot Kapton and still leaves the glass finish on the bottom of the print.

When i print PLA i run the bed at 0.  Pla doesnt require a heated bed and it normally just screws things up.  Also you really need a layer fan for overhangs, the material needs to set quickly.

If you are over or under extruding you can change your steps on your repetier firmware right on the printer, the default is 99, i had to set mine to 95, i was getting way to much material making lots of blobs.

It wont stick if I turn off the bed and I dont want to print on tape. Thanks for post.

If you are over or under extruding you can change your steps on your repetier firmware right on the printer, the default is 99, i had to set mine to 95, i was getting way to much material making lots of blobs.

PLA needs to be well ventilated and also check your extrusion multiplier I was under extruding for a long time

Is there any instruction on how to do that?

Thanks for the quick reply.