---
title: Upward cut
description: An efficiency loss during the saw cut is noticeable and a feed is not attainable. At the same time...
image: https://www.tkmgroup.com/hubfs/Gattersaege_Aufw%C3%A4rtsschnitt.png
---

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Sawmill industry

# Upward cut

![](https://www.tkmgroup.com/hubfs/Gattersaege_Aufw%C3%A4rtsschnitt.png)

 25.08.2020 [ TKM ](https://www.tkmgroup.com/en/troubleshooting/author/tkm)

## Upward cut

An efficiency loss during the saw cut is noticeable and a feed is not attainable. At the same time an excessive reject of sawdust to the top is detectable.  
The thicknesses of the board start to differ.

****

Possible causes:

 Projection of the gang saw does not correspond with the stems’ feed.

-  Adjust the frame and set-up (due to OEM); control the gang saws’ bolts – if necessary, re-position

 Wrong back-clearance angle

-  correct re-grinding of the tooth (shouldn’t be too flat; at least 14° back-clearance angle recommendation

 

### Relevant articles

- [
  
  
  
  ##### Cracks in the base body (sawn timber capping)
  
  
  
  ](https://www.tkmgroup.com/en/troubleshooting/cracks-in-the-base-body-sawn-timber-capping)
- [
  
  
  
  ##### Poor cutting quality (sawn timber cut to size)
  
  
  
  ](https://www.tkmgroup.com/en/troubleshooting/poor-cutting-quality-sawn-timber-capping)
- [
  
  
  
  ##### Poor cutting quality (edging)
  
  
  
  ](https://www.tkmgroup.com/en/troubleshooting/poor-cutting-quality-edging)
- [
  
  
  
  ##### Tooth breakage (edging)
  
  
  
  ](https://www.tkmgroup.com/en/troubleshooting/tooth-breakage-edging)

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