I've Gone and Done Something Mental

[Parm]

This happened, first time I put more than one part on the bed, think the bed temp wasn’t high enough.

was set at 60 for Sunlu PLA +, extruded temp at 210

 

[MattF]

Were they all flat parts? I had it try stringing last week because of a shaped piece which had no bed contact in places.

 

[Parm]

Were they all flat parts? I had it try stringing last week because of a shaped piece which had no bed contact in places.

Was a combination of flat and shaped parts.

plus those two things on the right have a 12mm overhang at the rear. I now know they require supports

This is becoming a steep learning curve. Lots of thinking and checking required before pressing print

 

[brewdexta]

Bed glue and/or use a brim when slicing if there isn't much bed contact.

 

[MattF]

What's a brim?

 

[slim_boy_fat]

What's a brim?

Something the barman at The Welders Arms isn't familiar with - as in 'fill to the....'

 

[brewdexta]

In Cura, go to build plate adhesion, it explains there if you hover over it, there's raft, brim and skirt. brim puts a single layer thick border around your print.

 

[growntree]

This happened, first time I put more than one part on the bed, think the bed temp wasn’t high enough.

was set at 60 for Sunlu PLA +, extruded temp at 210

View attachment 301506

One of your parts came unstuck from the print bed, so the filament had nothing to stick to. Usually caused by the print bed not being clean or not being level as the first layer generally needs to squish into the bed to stick properly. I used to just wash the magnetic bit in the sink with a nail brush and then a bit of ipa.

 

[growntree]

In Cura, go to build plate adhesion, it explains there if you hover over it, there's raft, brim and skirt. Skirt puts a single layer thick border around your print.

A raft is like a small pallet for your print. A brim is like printing a top hat when you wanted a fez. A skirt is just a ring of plastic around the print that doesn't actually touch the print, but if it doesn't stick, you can easily see that the print won't stick either, so you can cancel the print and level or clean the bed before you have another go. The raft and the brim will just peel off the print afterwards.

 

[ChrisBailey]

Another casualty

 

[skotl]

Another casualty

View attachment 301729

I see you've managed to progress to the same stage that Parm took four weeks to complete

 

[Parm]

Right folks, I’m now official stuck

when I home the printer it rests off the bed. I’ve tried to adjust the offset, saved it but then when you press home it goes to the off bed position.

what am I doing wrong?

ive had A good look on the web and can’t find anything other than what I’ve tried, probably because I don’t know what to look for

im unable to level the bed when the print head isn’t in the correct place

please help, it’s doing my head in

 

[Pete.]

You have to move the homing switch up or down to suit.The z-axis doesn't home off the bed, it homes off the switch.

 

[Parm]

You have to move the homing switch up or down to suit.The z-axis doesn't home off the bed, it homes off the switch.

What’s the homing switch?

 

[Pete.]

To the left of the bed on the vertical pillar should be a bracket holding a microswitch. When the machine homes it travels down until it closes that switch then goes up to it's 'home' position. Adjusting the switch vertically will adjust the home position distance above the bed.

 

[Parm]

To the left of the bed on the vertical pillar should be a bracket holding a microswitch. When the machine homes it travels down until it closes that switch then goes up to it's 'home' position. Adjusting the switch vertically will adjust the home position distance above the bed.

Ok. Didn’t say anything about in the instructions.

Are there any decent instructions out there that I can read?

ive got the very basics going but I’m finding that theres a whole heap more and I would benefit from reading something.

computer intuition isn’t a skill I have

 

[Pete.]

No it doesn't the switch sits on a cnc bracket that is supposed to hold it at the correct height. Creality released a vid on how to adjust it:

 

[Parm]

No it doesn't the switch sits on a cnc bracket that is supposed to hold it at the correct height. Creality released a vid on how to adjust it:

Ok , that’s useful.

im finding that the bed adjustment screws are right at the end so there is no tension in the springs.

i Will have a go at making some adjustments after the current print has finished, it seems to be working well

 

[Pete.]

Mine were the same I put a washer under each spring.

EDIT: I think I WAS going to put a washer under each spring but then I decided to adjust the homing switch downwards.

 

[AndersK]

Usually printers use the probe during homing and not the limit switch for Z-axis.
Limit switch for X & Y then probe Z and finally lower bed a few mm to give some nozzle clearance.