Accurate Strong Gantry

[GEOFFREY]

Years ago two gentlemen visited us from a UK company Built Offsite to clarify the details of some modular building.
Being interested and reading some books about inventors and Technics I told them that the industrial revolution did not begin accidentally in the UK.The only fortuitous was just they came from Shrewsbury where around the industrial revolution had begun.
You are enterprising and advised to reach the high technical level where you are now.
I hope I am enterprising enough no to stop at the difficulties and advised enough to perceive the realistic factors.

The cost is vulnerable issue and the question is over and above: what is different between machine and good machine and very good machine. Purpose+Design+cost+used time+effort and so on -there are many factors are too see and specify the scope.

I do not usually comment on this type of thread, but PLEASE listen to Jazz. He knows exactly what he is talking about and trying to stop you spending money needlessly. Build a good quality router for softer materials and buy/convert a mill for steel. That is my lot, I shall not comment again in this thread. Good luck with whatever you decide. G.

[vargai]

I do not usually comment on this type of thread, but PLEASE listen to Jazz. He knows exactly what he is talking about and trying to stop you spending money needlessly. Build a good quality router for softer materials and buy/convert a mill for steel. That is my lot, I shall not comment again in this thread. Good luck with whatever you decide. G.

Thank you and you are welcome any time.

[Ross77]

Normally if someone says that it cant be done then that is like a red rag to a bull and I try to come up with a solution, but now you have brought steel into the equation then I would agree with the others that it will be really difficult as the requirements are at opposite ends of the spectrum.

If it was Diy the you could compromise on the design and use the machine to the best of its abilities but you seem to be saying that it will be a commercial use so that wouldnt really be feasible.

If you did proceed you will need to two spindles.

1. Low speed with high ridigity and power at low speed for steel.
2. High speed and power at high speed for ali.

You would then need 10mm pitch ball screws on high power servo motors with high resolution encoders to get the accuracy. Etc etc.

It can be be done but like the others have said it will be expensive and you will still end up compromising the design. It may well be cheaper and better from a production point of view to build 2 specific machines. Good luck

[vargai]

It may well be cheaper and better from a production point of view to build 2 specific machines. Good luck

IMO you will be much better building a router that will cut everything in it's capabiltys, Ie woods,plastics etc to a high standard.
Then buy a milling machine at later date that will do and give the same high accurecy and repeatabilty with Aluminium and Steel etc.

Sorry for late answering. I could have placed this post to a general thread since by going through my one the searching on the good design led the doubt about the primary aim.
Reading the posts after my latest design I recognized or at least felt the generally weak points. Sorry for seeming stubborn. It is not meant to happen. My tenacity is all about my goals and not the way and method to reach it. It is not easy to abandon a main intent and to say right away yes, or no.
So thank you all who involved for your efforts and advice in highlighting my weakness.
I hope I do not have to turn my back on metal and will be able to build a good router for Al and other softer material.

[GEOFFREY]

Hi, I said that I would not post again on this topic, but your final sentence sounds very sensible. G.

[Ross77]

Hi Vargai
Don't be put off building a machine, maybe you should proceed and prove us all wrong :o)

everyone is just trying to help you get the best results.

[vargai]

Hi Vargai
Don't be put off building a machine, maybe you should proceed and prove us all wrong :o)
everyone is just trying to help you get the best results.

Of course I do not , because the goal is not to prove that is impossible but to build what is possible:)
Let me ask something I have a doubt about.
I saw your latest general frame design and I am wonder how the steel hollow tube beams bracing react to the machining force on a router .(generally).The seems like "strings" and source of resonance but I have never seen or heard router during operation.
Actually I am wonder of the smallest applicable size ie 50x50x3 showed many times.