New Build 1000x600x200mm (newbie)

**njhussey** · 05-03-2015

How big are the bolts for the rails? Will they fit in the profile that you've drawn? As Jazz says the profile is looking a bit small and weak, you could do with beefing them up a bit. It's looking like you're putting the Y axis ball screw on the front of the gantry, you'd be better putting it on the back and bringing your spindle nearer the front of the Y axis otherwise it could be quite a way off the front and a way in front of the X axis bearings. Are all the rails the same size?

**Noplace** · 05-03-2015

Originally Posted by njhussey

How big are the bolts for the rails? Will they fit in the profile that you've drawn? As Jazz says the profile is looking a bit small and weak, you could do with beefing them up a bit. It's looking like you're putting the Y axis ball screw on the front of the gantry, you'd be better putting it on the back and bringing your spindle nearer the front of the Y axis otherwise it could be quite a way off the front and a way in front of the X axis bearings. Are all the rails the same size?

can't I just reduce the space I reserved at back of gantry from 80mm to 40mm? so that the plates and spindle come within the bearing range

**Noplace** · 07-04-2015

Hey everyone, I'm in the process of redesigning the gantry and need your input, I will probably need to use pulley and belt for both Y and Z based on the new placement of motors.

can you please help me in figuring out the belt length I require based on distance between motor and ballscrew? I prefer 1:1 ratio and based on what was recommended to me I think HTD pulley 5mm pitch 15mm width is good?

many thanks, will try to post design photos soon

**Boyan Silyavski** · 07-04-2015

Originally Posted by Noplace

can you please help me in figuring out the belt length I require based on distance between motor and ballscrew? I prefer 1:1 ratio and based on what was recommended to me I think HTD pulley 5mm pitch 15mm width is good?

Here is the belt length calculator , sorry, busy now but later will take a look if nobody does before

http://www.product-config.net/catalo...an/config.html

**Noplace** · 07-04-2015

thank you very much!

**Noplace** · 08-04-2015

Just a preview render, if you have comments please let me know.

Based on center distance I got around 292.2mm belt length, but in the site it says next available length is 295mm , i assume that is a standard length increment across all vendors, so is it ok to get that length ?

**Clive S** · 08-04-2015

You will need to put slots in the motor mounting to enable you to have adjustment to tighten the belt. It is quite normal to have 30 - 40 mm adjustment. >clive