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Out of square gantry

Out of square gantry

Postby glassart » Mon Oct 23, 2017 8:03 pm

Hi
I am a new member, bought a black toe kit a few years ago and built a 2' x 8' machine.
I have been busy with work and played around with it on and off.
Finally getting serious with it and have been trying to dial in the machine. My problem is the gantry Y axis is out of square with my table rails X axis. What I have tried so far is adjusting my chain tension to compensate while this works short term is reeks havoc on my motor and shaft couplings for the X axis, to much tension to hold it square, and I read on this forum that it is not good to have the tension to strong.
Plus I would think that equal tension would be better for my machine anyway.Any ideas on how I might square the up, The gantry tracks well on the rails just not sq to them about a 1/4" out.
Thanks Bill
glassart
 
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Joined: Mon Oct 23, 2017 4:40 pm
CNC Machine: BlackToe v4 2x4

Re: Out of square gantry

Postby Awesomeness » Wed Oct 25, 2017 3:50 am

There are a few posts on here, including one I wrote, about the process of squaring the gantry. Try the search function.
If you don’t have time to do it right, when will you have time to do it over?
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CNC Machine: BlackFoot v4 4x8

Re: Out of square gantry

Postby glassart » Thu Dec 21, 2017 4:56 pm

I posted this update a while ago but it seems it didn't post. here it is again.
I went thru the recommended steps to square the gantry you wrote about, shimming my stops and loosing the couplings on the drive shafts, and while that worked I did have to re-square before turning on the power to my motors each time. I thought there must be a better way so I loosened the screws that attached the sides of the gantry to rails assembly wheel guides as there is a small amount of play because these a wood connections I tweaked them with the back of my hand until they sat perfectly against my stops which were now square and re tightened them. Now I can start square every time. I hope this helps some else some time. I think because of my inexperience when I built the kit that I never thought of squaring this part of the build just put thing together
Bill
glassart
 
Posts: 2
Joined: Mon Oct 23, 2017 4:40 pm
CNC Machine: BlackToe v4 2x4


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