# Wasteboard too short?

**URL:** <https://forum.onefinitycnc.com/t/wasteboard-too-short/22863>\
**Category:** Wasteboard\
**Created:** [October 19, 2023, 1:39pm UTC](https://forum.onefinitycnc.com/t/wasteboard-too-short/22863 "2023-10-19T13:39:54Z")\
**Posts on this page:** 1\
**Showing post:** 11

<div class="post-metadata">

**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\
**Post date:** [October 21, 2023, 7:16pm UTC](https://forum.onefinitycnc.com/t/wasteboard-too-short/22863/11 "2023-10-21T19:16:35Z")

</div>

Hey Jeremy,

> [@Voltronollie](#):
>
> flattened my wasteboard and when I went to carve the grid pattern the bit was too short to reach.

the surfacing bit was long enough but the bit you want to use for the grid is shorter? Do you have a weblink to the bit’s specs? You could buy a longer bit.

The problem is known which is why at least on the Original Series Assembling Instructions (I don’t know for Elite) Onefinity suggests a rather thick wasteboard which makes you loose Z travel effectively. The reason lies in the fact that the Onefinity Z assembly and milling motor mount strongly differs from what is usual on gantry-type cnc machines:

> [@Waste Board location](https://forum.onefinitycnc.com/t/waste-board-location/19854/2):
>
> Unfortunately the Onefinity milling motor mount, unlike on [other machines](https://forum.onefinitycnc.com/t/machinist-in-x-50/8159/18) (see also [here](https://forum.onefinitycnc.com/t/machinist-in-x-50/8159/10), [here](https://forum.onefinitycnc.com/t/offer-a-43mm-spindle-mount-option-for-the-elite-series/19095/3) and [here](https://forum.onefinitycnc.com/t/43mm-euro-spindle/15188/28)), **does not protrude downwards beyond the lower end of the Z assembly**.
> 
> For these reasons, some people replaced the Onefinity Z assembly by a [Universal Z assembly](https://forum.onefinitycnc.com/t/universal-z-axis-assembly/4415). How such a Z assembly/spindle slider could look like [is shown below](https://youtu.be/qHRkLz7IZT8?t=1147&list=PLx3FKzVphd7cRb9nwFMyCkJLcRBChdojC&index=17), see also [RoverCNC Z assembly](https://www.rovercnc.com/collections/z-axis-collection/products/rovercnc-z-axis-assembly-200mm-stroke-7-87?variant=53751165333) or [Sorotec Z-Axis DIY-Kit “Alu-Line”](https://www.sorotec.de/shop/CNC-Mechanics/z-axis-kits/)
> 
> [![RoboCNC_Z_slider_03](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/c/b/cb8bedbeb54bbde410955e2577d8b594b948200d.jpeg)  
> (Video shows how much the spindle mount attachment plate is able to move downward)](https://youtu.be/qHRkLz7IZT8?t=1147&list=PLx3FKzVphd7cRb9nwFMyCkJLcRBChdojC&index=17)

[![Traditional_Z_Assembly_on_Gantry-type_CNC_machine_v3](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/e/8/e8e345d7df187e222253cf23962469a66f1f5414.jpeg)  
**Traditional Z Assembly** : Video shows how much the spindle mount is able to protrude downward beyond the end of the Z linear rails](https://youtu.be/i6nwxFXegpc?t=546) [+](https://youtu.be/i6nwxFXegpc?t=357)

 ![Onefinity_Z_Assembly__with_exploded](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/b/b/bb9cbcb77d9fbdfd85624197d14c2dce6ca64b6b.png)

**Onefinity Z Assembly** : The spindle mount is unable to protrude downwards beyond the end of the Z linear rails

---

_[View the full topic](https://forum.onefinitycnc.com/t/wasteboard-too-short/22863)._