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makerbase-mks / MKS-SBASE

MKS SBASE is a powerful 32-bit 3D printer control board with LPC1768. Support Marlin2.0, Smoothieware. Support MKS LCD12864 and MKS TFT Touch Screens（SBASE V1.4 support MKS LCD12864A/MINI12864/LCD2004）. The motherboard integrates 5 DRV8825 axis and it is use software set current, supports wired network for printing and supports firmware update by SD card…
https://www.aliexpress.com/item/32384368763.html?spm=2114.12010612.8148356.13.f6ef39440hYPmP
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Sbase1.3, bltouch, smoothieware. Oddly low current coming OUT of BLt #80

Closed swatti87 closed 4 years ago

swatti87 commented 6 years ago

VERY odd issue.

Connected BLt and tested it like in this video: https://www.youtube.com/watch?v=zn_qLmcB_b0

Obvious difference being my Sbase and a 5v tiny bulb being used instead of a LED.

Using the M280 S5.5 command and pushing in the probe the bulb lights up VERY dim.

M119 command WILL NOT detect the position of the probe-pin. Using inverted command "!" the M119 says "probe:0" always. Not using "!" the M119 command says "Probe:1" always. Both regardless of where the probe-pin actually is. Using "^" or a resistor seems to have no difference.

MY theory is the BLtouch is letting too little current/power thru and the board cant detect the amount its currently sending. Is there a pin that can detect smaller currents/power?

Please help. I have no options left, i dont know what to try...

swatti87 commented 6 years ago

UPDATE:

When triggering, the currency jumps, i counted as high as 3.4v BUT it then drops to 0.4... Most likely the board simply ignores a quick jump like that. It SHOULD leave it on, but why wont it?

swatti87 commented 6 years ago

"Partially" solved. Got rid of BLtouch.

Last MKS i will ever buy.

kkszysiu commented 6 years ago

Any solution here?