path issue
Hi there, I found the time to connect the pwm and did a few more testing. I think the pwm works but I have issues with the testpattern regarding the path (see image)
I used a 5x5 testpattern which was generated by the testpattern laserscript someone posted here already. As you can see, the rectangles are not being drawn completely. I used the latest git checkout but also tried the last firmware from 2012..
I think this has something to do with the PWM but I am not sure.. I used a 1.1kOhm pull-up resistor between 5V and IN as suggested in the wiki.
Do you have any idea what could cause this?
Replies (3)
RE: path issue
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Added by peteruithoven over 10 years ago
Hi David,
I have no good glue what would cause these blocks to be positioned this weird. It's probably not that the lasercutter is inaccurate, because the blocks are okay shape wise.
What happens if you lasercut something else with a few seperate shapes?
RE: path issue
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Added by david.eickhoff over 10 years ago
mhm I removed the PWM connection and the testpattern works fine again..
Here is how I connected the pwm output (see pictures):
E (on laos) -> G
C (on laos) -> IN
1.1kOhm between IN and 5V
| origin.jpg (129 KB) origin.jpg | original connector | ||
| pins.jpg (111 KB) pins.jpg | connector pins | ||
| laos_pwm.jpg (120 KB) laos_pwm.jpg | connected to laos pwm |
RE: path issue
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Added by david.eickhoff over 10 years ago
oh.. I connected the pwm again and now it works also fine. without any changes in the config or code..
maybe the pull-up resistor was not connected properly so the power came through the laos board which was too much and caused the laos board (and the mbed) to loose some bits and bytes...
my test pattern works now :) great - and thanks for your fast response!