Gantry to bed height.

[JAZZCNC]

Hi all, here is the new design and I hope I have understood all the recommendations you advised. I don't want to start a build log until I at least have a clear plan.

No start one straight away. It's the best way then all your thoughts and questions are answered in one place rather than being scattered around the forum.
This is better for you and others following the thread because it can take several months or years for some people and you can easily go back and find info from months ago.

[Kitwn]

I see a classic mistake often made.!!. . . I will give you a clue but won't tell you what it is yet as a bit of fun test...Lol. . . . . If you don't see it then shout up but I think it will be obvious if you look carefully.!

"Fastenings" is the Clue.??

One of the reasons for mocking up the design in cheap MDF or plywood before marring the pristine beauty of your expensive aluminium plate.

[m.i.k.e]

One of the reasons for mocking up the design in cheap MDF or plywood before marring the pristine beauty of your expensive aluminum plate.

Sounds like a good plan ��

[m.i.k.e]

No start one straight away. It's the best way then all your thoughts and questions are answered in one place rather than being scattered around the forum.
This is better for you and others following the thread because it can take several months or years for some people and you can easily go back and find info from months ago.

Will do.

[m.i.k.e]

I see a classic mistake often made.!!. . . I will give you a clue but won't tell you what it is yet as a bit of fun test...Lol. . . . . If you don't see it then shout up but I think it will be obvious if you look carefully.!

"Fastenings" is the Clue.??

hi JAZZCNC, Is this the problem? bolting the Z bearing spacing block.

[JAZZCNC]

hi JAZZCNC, Is this the problem? bolting the Z bearing spacing block.

No but your thinking along the right lines just in wrong place.?

[Clive S]

No but your thinking along the right lines just in wrong place.?

Put him out of his misery

[JAZZCNC]

Put him out of his misery

Nah I've got faith in him, he'll figure it out I'm sure and will feel better for it, plus I'm in whind up mood...

[m.i.k.e]

I don't like this game �� ��

[JAZZCNC]

I don't like this game �� ��

Bingo.!!! . . . . But don't worry It's an easy fix and actually makes setup easier. You want another plate, basically, you make the gantry as two separate pieces. The bearing plate with ball-nut mount as one fixture and then have a separate plate on the gantry which bolts into the bearing plate. You will need to make the plates slightly wider than the gantry so can bolt them together.
The advantage of this setup is you can easily adjust the gantry square by losing the plates and it doesn't affect the ballscrews. The way you have it now if you needed to adjust the gantry square to the rails, which you 99.99% would need to do then any adjustment would have put twist on the ball-screws causing them to bhind.!