bottom layer problem

[GregTheGreat]

I’ll print a test print to show my layering I’ve not seen any deformation in the past I’ve seen it on the second layer get wavy

[Sra1]

Looks like a huge print - have you tried to repair?

As its on the base, and out of sight, you could try a few things. I would suggest trying a heated finishing tool, and perhaps more radically heating an old baking sheet in the oven (dont put the print in there!) and then remove it from the oven and place your print on it, allowing it to cool completely before removing it. The sheet should flex a little to help with removing the print, once cold.

As for causes, theres been a lot of replies already. I dont see any mention of a potential cold spot on the heated bed, might be worth checking with an ir heat gun.

good luck

[GregTheGreat]

Well for the conclusion is the z height because the second layer does not stick very well to inicial layer but over all the entire print comes out fine I think the z is off by - 1 after I changed the hotend because I got a replacement about a week ago and just noticed this happen now I’ve not changed the z hight because ive not have chance I’ve been busy but it has to be that I’ve tried printing at 2mm and changed other settings for printing and still same problem

[GregTheGreat]

I’ve checked possible problems that a bad z hight can cause but am not in the picture idk

[R2Dd2]

I agree that the first layer setting are very heavy. It is close to the max capacity of an extruder. It will probably not melt the plastic quick enough. Resulting in cooler plastic being deposited and maybe even more resistance resulting in missed steps or slipping filamentresulting in less plastic than calculated by the firmware. So lines do not touch and/or are not hot enough to fuse together.

[GregTheGreat]

Ah so you think my temp. Is to low I’ve been using maker geeks and pla is needed at 230 and I’ve been trying 200-210 so I’ll try that

[R2Dd2]

No, I think you should decrease bottom layer Line width to 100% and bottom layer thickness to 0.2mm. You will extrude less than half the volume per time unit which is easier to heat up consistantly.

[GregTheGreat]

I get problems when set to 100

[GregTheGreat]

Ok this is the settings I am using now like everyone told me to change and this is what happens special when I change the width from 200 to 100 so I guess the z hight is off but why when I use 200 inicial layer it’s fine

[GregTheGreat]

Ok this is the changes I did on Cura and the results now I know that it is the z height am I right also think half of you were but when I change the width from 200 to 100 this is the result

[GregTheGreat]

Ok this is the changes I did on Cura and the results now I know that it is the z height am I right also think half of you were but when I change the width from 200 to 100 this is the result

[R2Dd2]

Hi Greg. I see initial layer thickness is still at 0,3mm. Please change to 0,2. Because at 200 percent and 0,3 you were extruding so much filament that it probably compensated a bit for z height error. But at the expense of lines not being wide enough to touch each other. If you do first layer at 100% and 0,2 any z error is much easier to detect. ( and loads on extruder are much lower) Because if to close to the bed, printwidth will become too wide. This becomes visible when infil patterns start to overlap. If to high, lines are not touching. A good workaround is to turn on raft. This will increase the succesrate of many prints and will also compensate most z errors. Good luck

[GregTheGreat]

Ok did as you asked these are the results

[GregTheGreat]

Ok I wiped the bed down and tried again this is the next result takes time to stick to bed when extruding but layering still not perfect but it’s progress top and bottom pictures with new setting inicial 2mm width 100 print hiegt 2mm

[AutonomousAlex]

I run my printrbot 1405 with 200% line with with a ubis 13s hotend with no problem but I have to agree espescially if you dont have the new printbot hotend to turn that down to 150% at least.

[AutonomousAlex]

You can keep it at 200 or 150 then change the layer height to the first layer at .254 then the layer hight at .2064 as these values are calculated from the prusa calculator.

[GregTheGreat]

I just set it to 100% at 2mm inicial layer at. 2mm print and got this… I appreciate you guys input but all the help I am getting here is the only help I’ve gotten oh and to add I think the layer hight might be to high not really sure takes a wile for filament to stick but I’ll increase the width to 150%

[KrazyJim]

1) Cool the printer.

2) Start the table leveling function.

3) See how many thicknesses of computer printing paper you can get between the print head / nozzle and the print bed.

4) Report back to us the number of layers of paper you can get between the head and build surface

To me it appears to be a gross error in the head to build surface distance.

Also the filament is too cool and the material already printed is cooling too much before the next layer is applied.

Add 20 deg C to filament temperature after you have adjusted the build table height to be correct.

Clean build surface with alcohol before starting next print.

[GregTheGreat]

Ok these are the results on 150% top and bottom… If I place it at 100% it won’t stick properly to bed

[AutonomousAlex]

Z height needs to be lowered by about -.25 mm also try moving the z probe closer to the hotend nozzle by screwing it down some as it gets better measurements this way.