Retracting across first layer

[jetdillo]

I've noticed that when printing small parts, it's common for Ideamaker to doing a retraction at the end of each line when drawing out the first layer, esp. for filling in an area.
For example, printing one of the calibration cubes will typically result in the perimeter/shells being drawn, followed by a diagonal fill from one corner to another. During this fill, I've seen the extruder extrude out a line, stop, retract and then move onto the next line. On subsequent layers, like doing the bottom fill layers, the extruder just bops back and forth, laying out filament in a continuous stream, then draw the perimeters again, then bop back and forth to do the fill, all with minimal retraction.

I'm wondering why this is happening on the first layer and not others.
I'm not sure if I checked a box I shouldn't have or if this is YetAnotherBug in IM, or just a function of operating in a confined space with fast(150mm/sec) X-travel.

[Vicky@Raise3D]

It is because the first and last layer are the surface layers. Ooze and strings will affect the quality of the surface, so these two layers are forced to enable retraction before each movement. For the remaining layers inside, we think those are inner layers, ooze and strings won't affect a lot the final result. So we enable the option of Avoid Retraction Inside Model under Ooze tab. If disable this option, you will see also a lot retractions in the other layers.

[kocska]

Dear Vicky!

I think your software is almost perfect, but just because of this unnecessary feature.
This feature is increasing the print time and increasing the possibilities of the first layer errors.

How could I switch of it? If it is not possible you should make a switch for this.

Thanks!

[Vicky@Raise3D]

Notes taken. Will add this option into developing list.

[Xierion]

I have found a similar problem where the surrounding shells on the initial layer were printing fine, but the infill was lifting up from the bed. Increasing the 'Minimum Travel of Retraction' setting has stopped retraction and the entire initial layer prints fine. If there was a way to disable retraction on the initial layer, it would make my life a lot easier.