Project Beaver

[JoeHarris]

Let me just point something out that is easy trap to fall into and one that Joe has made which I hadn't spotted until now.? (Sorry Joe just seen your Video using drill, well done on first movement.)

You need to leave access to the bearing bolts so the gantry can easily be squared to the linear rails. How joe has it now means to square up he'll be putting twisting action on the bearings because can't get to the bearings because of profile.

Better way to do this is to split the job and have separate bearing plate which holds the Ball screw mounts etc and then have another plate which is part of Main gantry which then just sits on and bolts to the bearing plates. This can then be drilled & reamed and pinned when everything is square.

Much easier to setup and take apart if needed. The gantry becomes separate entity which can easily be removed and put back without too much hassle.

I'll repeat my self because can't be stressed enough ADJUSTMENT, ADJUSTMENT, ADJUSTMENT then some more ADJUSTMENT is key at DIY level to keeping the stress levels low. . .

Bugger.


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[JoeHarris]

Bugger.


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You way is better Dean but I have thought about this... the bolts which connect the end plates to the plates on the x rail bearings can be loosened and shimmed... not as easy but hopefully possible!?


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[JAZZCNC]

You way is better Dean but I have thought about this... the bolts which connect the end plates to the plates on the x rail bearings can be loosened and shimmed... not as easy but hopefully possible!?

In your case then yes Joe about the only thing you can do. But this just highlights another less than ideal situation with this approach.?
The gantry isn't bolted into the bearing plates and completely relying on the end plates to stop twist etc. Also not being securely bolted to the plates leaves gaps which can vibrate and introduce place for resonance.

Adjust is important but equaly so is being securely bolted and secured. Having one doesn't mean can't have the other just requires some careful thought and planning.

[JoeHarris]

In your case then yes Joe about the only thing you can do. But this just highlights another less than ideal situation with this approach.?
The gantry isn't bolted into the bearing plates and completely relying on the end plates to stop twist etc. Also not being securely bolted to the plates leaves gaps which can vibrate and introduce place for resonance.

Adjust is important but equaly so is being securely bolted and secured. Having one doesn't mean can't have the other just requires some careful thought and planning.

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[JAZZCNC]

Joe please don't stress too much over this. My comments where more to help others avoid similair issues and not to pull you down or have you start with major redesign etc.

Now you have it done this way then I'd suck it and see. If the gantry is long way from square then you may need to do some shimming. Anything you can do to make sure Y axis is 90Deg to X axis the better. Try to avoid using the screws to square the gantry as it will put binding on the bearings etc.

[JoeHarris]

Joe please don't stress too much over this. My comments where more to help others avoid similair issues and not to pull you down or have you start with major redesign etc.

Now you have it done this way then I'd suck it and see. If the gantry is long way from square then you may need to do some shimming. Anything you can do to make sure Y axis is 90Deg to X axis the better. Try to avoid using the screws to square the gantry as it will put binding on the bearings etc.

Thanks Dean, I figured I would suck it and see just wanted to talk though the options if needed...


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