1200mmX900mmX170mm 4axis cnc

**Clive S** · 06-09-2017

I will use ratio at all screws to lower the screw speed for cutting aluminium.

Nick time for a reality check. First you appear to be using direct couplings from the motor to the screws and then you use the above statement which to me it appears you want to use a belts and pulleys .

Re the list of the screws. Not sure why you need 2010 screws. Generally the screws don't need to be as long as the rails.

Have you done a full cad drawing to show how they will fit? You are going to spend a lot of money and certainly don't want a mistake.

The 30mm you mentioned is the F length of the screw ie just the bit that the coupling or pulley will fit on.

**Nickhofen** · 06-09-2017

Thanks again for the reply Clive.
My mistake about the coupling, I do not know why I put them in the order.
I will go for pulleys and belts for space reduction, vibrations ,torgue speed change and everything else you guys have analyze here so many times, lol.
I was thinking 20 balscrew for not wiping at critical speed because of length at x axis (1200 mm) ....Am I thinking right?

**Nickhofen** · 06-09-2017

Originally Posted by Clive S

Generally the screws don't need to be as long as the rails.

I remember that,we discuss it also with Zeefleeboy but at BST Automation there is a photo that show that the length at the description is the total length.
Did I misunderstand something, maybe I have to check with Fred from BST.

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**Clive S** · 06-09-2017

Originally Posted by Nickhofen

I remember that,we discuss it also with Zeefleeboy but at BST Automation there is a photo that show that the length at the description is the total length.
Did I misunderstand something, maybe I have to check with Fred from BST.

OK when you quote for the screw you tell him the total length (including the F length) and say what F length you want, the standard is about 15mm but that is not enough so ask for the F length to be 30mm (this is the bit where the pulley will fit).

If you PM me your list I will format it for you so that Fred will understand it. You also have to ask for grease nipples.

**Nickhofen** · 26-09-2017

I am ready to pull the the treager and place order for the rails and balance. I am thinking to use 1610 for X axis and for Y and 1605 for Z, should I go for 2010 for the long axis 1200? Will I gain something?
X axis is going to have two balscrews and two motors, and I am planing to cut wood and aluminium also!

**Clive S** · 26-09-2017

Originally Posted by Nickhofen

I am ready to pull the the treager and place order for the rails and balance. I am thinking to use 1610 for X axis and for Y and 1605 for Z, should I go for 2010 for the long axis 1200? Will I gain something?
X axis is going to have two balscrews and two motors, and I am planing to cut wood and aluminium also!

Nick I run 1610 on my long axis with two motors and 1250mm cutting length on X without problems.

**Nickhofen** · 26-09-2017

Originally Posted by Clive S

Nick I run 1610 on my long axis with two motors and 1250mm cutting length on X without problems.

Thanks Clive, I will order 1610 then!

**Nr1madman** · 26-09-2017

Originally Posted by Clive S

OK when you quote for the screw you tell him the total length (including the F length) and say what F length you want, the standard is about 15mm but that is not enough so ask for the F length to be 30mm (this is the bit where the pulley will fit).

If you PM me your list I will format it for you so that Fred will understand it. You also have to ask for grease nipples.

I totally missed the grease nippel. Does anyone know where to get some? :)

Skickat från min SM-N910C via Tapatalk

**Nickhofen** · 26-09-2017

Originally Posted by Nr1madman

I totally missed the grease nippel. Does anyone know where to get some? :)

Skickat från min SM-N910C via Tapatalk

Robert you can find those at Fred's store, BST Automation at Aliexpress.

**Nickhofen** · 13-10-2017

Not really an update but I have a good finding that I would like to share.
A friend of mine gave me three of those aluminium beams that he found as reinforcements in a box that had inside a big ladder !
It is like early Christmas, how can I use them at my build ?
First think that came to my mind is to cut the small square tube, the one that is weld perpendicular to the long one and use it as base for the motors and cut longitudinal the long part ,and use it as a support to L beam of Y axis?
Any thoughts ?