<p><code>*75</code> is the checksum value, (a method for verifying the integrity of the transmitted information).</p>

<p><a href="http://reprap.org/wiki/G-code#.2A:_Checksum" rel="nofollow noreferrer">RepRap wiki gcode : checksum</a></p>

<p>There is probably an option to not use/disable checksum generation in repetier/slicers, however this may only be advantageous for use with code run from the sdcard as it is extra processing (and probably less relevant when not being transmitted over serial connection. )</p>

CC BY-SA 3.0
2018-02-07T12:42:21.490Z
Thanks. Calibration getting closer but not quite right yet. I just wondered if this was a possible source of my X Y problem of circles not being round....grrrr. I will ignore it.
Plodmore
CC BY-SA 3.0
2018-02-07T11:04:08.760Z
2018-02-07T18:32:40.153Z
2018-02-07T18:32:40.153Z
Math3w
<p>I am still trying to dial in my Anet A8.</p>

<p>The Marlin firmware takes too long to scroll through the axis settings when I change them, so I use Repetier Host instead issuing <code>M92</code> followed by <code>M500</code>.</p>

<p>I noticed in the log window that X goes in as typed but that Y has a <code>*75</code> after the value i input. Can anybody tell me why/what it is for? I suspect I know what it does just no idea why it is doing it.</p>

<g-code><calibration><repetier-host><anet-a8>
Extra data appended to the Y values when issuing `M92` & `M500`
Plodmore
# Extra data appended to the Y values when issuing `M92` & `M500`

(Asked by: username_0 on 2018-02-06)

I am still trying to dial in my Anet A8.

The Marlin firmware takes too long to scroll through the axis settings when I change them, so I use Repetier Host instead issuing `M92` followed by `M500`.

I noticed in the log window that X goes in as typed but that Y has a `*75` after the value i input. Can anybody tell me why/what it is for? I suspect I know what it does just no idea why it is doing it.

**Tags:** g-code, calibration, repetier-host, anet-a8


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## 1 answers

### Answer by username_1 on 2018-02-07. Score: 4

`*75` is the checksum value, (a method for verifying the integrity of the transmitted information).

[RepRap wiki gcode : checksum](http://reprap.org/wiki/G-code#.2A:_Checksum)

There is probably an option to not use/disable checksum generation in repetier/slicers, however this may only be advantageous for use with code run from the sdcard as it is extra processing (and probably less relevant when not being transmitted over serial connection. )

> **Comments:**
> **username_0**: Thanks. Calibration getting closer but not quite right yet. I just wondered if this was a possible source of my X Y problem of circles not being round....grrrr. I will ignore it.  

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