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Re: when go back to home position, impect slide rail
Posted: Sat Jul 25, 2020
by Mao Pucheng
Jeffrey Aley wrote: Fri Jul 24, 2020
I think your stepper is losing count of the steps required to get back to "Home". This can be caused by too high speed or perhaps too high acceleration.
Try reducing speed (both the speed you use for your actual job, and the homing speed) and see if that helps. If not, reduce the acceleration and re-test.
It seemed losting count fo the steps.
but, I already set a slow speed, home speed only 20mm/s.
Re: when go back to home position, impect slide rail
Posted: Sat Jul 25, 2020
by Mao Pucheng
update:
1. when the machine initializes. I moved the the laser head by →←↑↓ button, the head stoped right position.(figure 1)
2. the the machine finished the first job.
3. I moved the laser head by →←↑↓ button again, the head cann't stop!! (figure 2)
4. then I check the limit switch status on panel, the limit switch already on, but still can move. (figure 3)
figure1
3.jpg
figure2
2.jpg
figure3
1.jpg
Re: when go back to home position, impect slide rail
Posted: Sat Jul 25, 2020
by Mao Pucheng
Pete Cyr wrote: Fri Jul 24, 2020
Mine does not.
My machine initializes on power on - moves to the limit switches and then moves to "current position" - current position = "origin"
After each cut my laser head goes to origin/current position
Are you setting "Origin" on the laser key pad?
origin.png
I set my laser to the center of of my work for alignment
configuration-system.png
Yes, I set it. but the problem happened when the head back to home.
Re: when go back to home position, impect slide rail
Posted: Sat Jul 25, 2020
by Pete Cyr
Mao Pucheng wrote: Sat Jul 25, 2020
update:
1. when the machine initializes. I moved the the laser head by →←↑↓ button, the head stoped right position.
then press origin
然后按原点
Ránhòu àn yuándiǎn
Re: when go back to home position, impect slide rail
Posted: Mon Jul 27, 2020
by Mao Pucheng
Pete Cyr wrote: Sat Jul 25, 2020
Mao Pucheng wrote: Sat Jul 25, 2020
update:
1. when the machine initializes. I moved the the laser head by →←↑↓ button, the head stoped right position.
then press origin
然后按原点
Ránhòu àn yuándiǎn
OK, I check it again. thanks a lot.
Re: when go back to home position, impect slide rail
Posted: Thu Jul 30, 2020
by John Salitsky
I recently had this happen on my y axis. I was doing some testing while trying to align my mirrors, which is another story entirely, and when the head returned to the back of the machine on its way to the upper left home position it crashed into the back of the machine, past the limit switch, making the most god awful noise. I hit the big red boo boo button and started inspecting. Long story short, the wire cover that looks like a large bicycle chain had popped a link, slid off the shelf and crashed into the limit switch knocking it out of position. Unscrewing it repositioning the switch solved the issue.
Sorry, I have a tendency for long winded stories to explain things.