MK1 Steel router build log 1500x800x200

**routercnc** · 08-10-2017

Looking good but I would have added another member to the top of the black frame work to support the underside of the white cross members. Not too late to bolt something in and shim or epoxy any gaps.

Fixed float is fine for the screws but I'm thinking of fixed fixed on my long axis (as per Boyans machine) to reduce a slight buzz / vibration when the machine is towards one end. In theory you might worry about heat and expansion but for the amount I use my machine and the speeds etc I think it is a low risk. Not sure yet but might make it with a spring preload . . . Or keep it simple and lock it in place.

**driftspin** · 08-10-2017

Originally Posted by routercnc

Looking good but I would have added another member to the top of the black frame work to support the underside of the white cross members. Not too late to bolt something in and shim or epoxy any gaps.

Fixed float is fine for the screws but I'm thinking of fixed fixed on my long axis (as per Boyans machine) to reduce a slight buzz / vibration when the machine is towards one end. In theory you might worry about heat and expansion but for the amount I use my machine and the speeds etc I think it is a low risk. Not sure yet but might make it with a spring preload . . . Or keep it simple and lock it in place.

Hi router CNC,

There will be 4 bolt on diagonals from the middle crossmember when electric panel and additional equipment is fitted.

Grtz Bert.

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**Boyan Silyavski** · 11-10-2017

At the moment my 3m long ball screws in Fixed/Fixed config are without a glitch. Though as i said somewhere, when i start machining very fast like more than 12m/min then the rotating nuts start to heat and heat the screws. I think the fact that the gantry is ~200kg and moves with such high acceleration plus the speed , helps that. Which is cured by additional greasing prior to that. Otherwise no problems till now.

I think one of the biggest problems when DIYcnc is not locking the bolts with a thread locker. Now i lock any bolt on a machine. Not only the obvious that need that. That is also valid for the shafts and the pulleys. A must do , i would say.

**driftspin** · 13-10-2017

Originally Posted by Boyan Silyavski

At the moment my 3m long ball screws in Fixed/Fixed config are without a glitch. Though as i said somewhere, when i start machining very fast like more than 12m/min then the rotating nuts start to heat and heat the screws. I think the fact that the gantry is ~200kg and moves with such high acceleration plus the speed , helps that. Which is cured by additional greasing prior to that. Otherwise no problems till now.

I think one of the biggest problems when DIYcnc is not locking the bolts with a thread locker. Now i lock any bolt on a machine. Not only the obvious that need that. That is also valid for the shafts and the pulleys. A must do , i would say.

Buy locktite, noted :-)

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