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-   -   Making Adjustments - Spokan, WA (http://www.mechmate.com/forums/showthread.php?t=5099)

Brand9ne Mon 21 September 2015 17:06

Making Adjustments - Spokan, WA
 
Hey all, I'm brand new the forum. I have some metal fab skill and some welding skill, but this is my first CNC table. I've posted a few pictures of what I have built so far and I would love some feedback. One question I had on my table is the center of the MDF board is the same centerline as the main beam. According to the plans this shouldn't be, so I was wondering why and is it worth my time to cut my welds and move the beams?http://www.cryobuild.com/table01.jpeg
http://www.cryobuild.com/table02.jpeg
http://www.cryobuild.com/table04.jpeg

Fox Tue 22 September 2015 02:47

It's only not intended to be centered to maximize your work area with the minimum size of your machine (read main beams). Main reason is your router/spindle is often mounted off-center.

If you do not need the entire work area to be as big as your mdf sheet, your already good.

I for example actually built my machine symmetrical on intent, but extended some measurement so I still have full travel over the entire mounted sheet.

I see you used L profiles, for your reinforcements, better would have been to also use tube (square or round) there.

Brand9ne Tue 22 September 2015 09:22

Thank you very much for the quick reply. Which measurements did you extend for full travel? I did want to be able to use the entire MDF sheet for the cutting area.

Fox Wed 23 September 2015 12:14

My machine uses a custom z implementation (check my build thread) so my numbers would not work for you. Check the plans or Google the forum for symmetrical table. Gerald posts on the subject as well somewhere in the table section.

Brand9ne Thu 24 September 2015 10:37

Thank you again for your reply Fox. I've decided I will move my main beams to the correct spots, but do you think it is an issue that I have the table legs going to the cross member and not the main beam?

Fox Thu 24 September 2015 10:59

In short yes. You want everything about the table as stiff as possible. Your approach is therefore not helping. Are you working of the plans?

Brand9ne Thu 24 September 2015 11:23

I am now, when I started I had the metal but didn't have access to the plans or the forum at the time and was going off memory. I'm going to cut all my welds and redo it right, thank you again for your help. I'll post more pictures when I have things corrected.

pblackburn Sat 26 September 2015 22:45

Minor setbacks are part of the learning curve. Study the plans, it is the old adage 'measure twice, cut once'....the same is true with the plans. Most everyone has a slight modification they had to do with the plans.


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