Triangular wave and print area

Leblond

25/10/2020, 19:37:22 G32 bed probe heights: 0.190 0.198 0.195 0.195 0.192 0.192 0.190 0.195 0.188 0.192, mean 0.193, deviation from mean 0.003
25/10/2020, 19:36:52 G32 bed probe heights: 0.195 0.195 0.192 0.202 0.212 0.208 0.205 0.200 0.200 0.198, mean 0.201, deviation from mean 0.006
25/10/2020, 19:36:22 G32 bed probe heights: 0.188 0.178 0.178 0.178 0.178 0.178 0.173 0.178 0.183 0.180, mean 0.179, deviation from mean 0.004
25/10/2020, 19:35:52 M98 P"0:/macros/Calibrazione a punto singolo/Calibrazione x 10"
G32 bed probe heights: 0.190 0.192 0.192 0.195 0.190 0.185 0.190 0.188 0.188 0.190, mean 0.190, deviation from mean 0.003

Veti

ok that looks good.

now do the test again, grab the hotend carriage and turn on clockwise and anticlockwise between probes. dont force it but do it gently.

after that do it again trying to rotate it forwards and backwards.

Leblond

in practice I take the trolley and manually try to move it and then I do the tests again, did I understand correctly?

Veti

@Leblond
yes. we are looking for backlash in the assembly. movement could cause the assembly to rotate and cause the result you are seeing.

Leblond

25/10/2020, 19:57:24 G32 bed probe heights: 0.192 0.195 0.190 0.192 0.192 0.192 0.190 0.190 0.190 0.190, mean 0.191, deviation from mean 0.002
25/10/2020, 19:56:50 G32 bed probe heights: 0.183 0.185 0.180 0.185 0.185 0.183 0.183 0.183 0.185 0.183, mean 0.183, deviation from mean 0.002
25/10/2020, 19:56:17 G32 bed probe heights: 0.168 0.168 0.168 0.173 0.170 0.165 0.170 0.170 0.170 0.170, mean 0.169, deviation from mean 0.002
25/10/2020, 19:55:43 M98 P"0:/macros/Calibrazione a punto singolo/Calibrazione x 10"
G32 bed probe heights: 0.183 0.185 0.183 0.185 0.185 0.185 0.183 0.185 0.185 0.183, mean 0.184, deviation from mean 0.001

Veti

M906 X800 Y800 Z800 E800 I30 ; set motor currents (mA) and motor idle factor in per cent

there are default values from the configurator.

a quick google shows the motors seem to be 1,68 A motors

so you are running way to little current. try 1300

Leblond

The motors are Quimat Nema 17 Stepper Motor 1.7 A 0.59 Nm 84 oz.in 47mm

Veti

@Leblond said in Triangular wave and print area:

1.7 A

so running them at 75% rounding to nearest 100 is 1300.

Leblond

ok I took them to 1.3 and I'm doing the test again later

Leblond

25/10/2020, 20:56:11 G32 bed probe heights: 0.198 0.195 0.195 0.198 0.195 0.200 0.195 0.200 0.192 0.195, mean 0.196, deviation from mean 0.002
25/10/2020, 20:55:37 G32 bed probe heights: 0.183 0.180 0.180 0.183 0.183 0.183 0.183 0.180 0.180 0.183, mean 0.181, deviation from mean 0.001
25/10/2020, 20:55:04 G32 bed probe heights: 0.183 0.178 0.173 0.170 0.178 0.173 0.173 0.178 0.178 0.173, mean 0.175, deviation from mean 0.004
25/10/2020, 20:54:31 M98 P"0:/macros/Calibrazione a punto singolo/Calibrazione x 10"
G32 bed probe heights: 0.195 0.192 0.192 0.195 0.192 0.195 0.195 0.195 0.188 0.195, mean 0.194, deviation from mean 0.002

Leblond

I'm retrying cold-meshing the plate to see if we've made any improvements

Leblond

Leblond

no improvement

Veti

it seems to be very consistent.

can you turn the glass 90 degrees?

OwenD

Is the X carriage on wheels?
I'm not familiar with the printer and can't tell from the photos I've seen,
Almost looks like an eccentric wheel causing the nozzle to rise & fall with each rotation

Leblond

Leblond

Yes, the trolley is on rails and has eccentrics

peter247

@Leblond

level 3.png

I've had the same problem once , it was the x axis wheels and stopped the ripple with linear rails , but I guess getting better would have fixed it too.

Leblond

@Veti yes I have already tried to rotate it 90 degrees, but no improvement

Leblond

@peter247 in practice they had?