# Adjust feedrate?

**URL:** <https://community.inventables.com/t/adjust-feedrate/37429>\
**Category:** Laser Cutting\
**Created:** [May 6, 2017, 12:52am UTC](https://community.inventables.com/t/adjust-feedrate/37429 "2017-05-06T00:52:24Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![PatrickRogers](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/patrickrogers/32/44706_2.png) [@PatrickRogers](https://community.inventables.com/u/PatrickRogers)\
**Post date:** [May 6, 2017, 12:52am UTC](https://community.inventables.com/t/adjust-feedrate/37429/1 "2017-05-06T00:52:24Z")

</div>

I’m adjusting the feedrate in piclaser then sending the picture in pic sender. Whether it’s a feed rate of 200 or 10000, it’s not changing speed and it’s charring the heck out of the wood. How do I fix this?

---

<div class="post-metadata">

**Author:** ![picengravertoo](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/picengravertoo/32/45297_2.png) [@picengravertoo](https://community.inventables.com/u/picengravertoo)\
**Post date:** [May 6, 2017, 1:17am UTC](https://community.inventables.com/t/adjust-feedrate/37429/2 "2017-05-06T01:17:07Z")

</div>

What version of grbl are you running? If it’s not a version for laser use, the S commands will dwell on every line of gcode and run slow.

---

<div class="post-metadata">

**Author:** ![PatrickRogers](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/patrickrogers/32/44706_2.png) [@PatrickRogers](https://community.inventables.com/u/PatrickRogers)\
**Post date:** [May 6, 2017, 1:19am UTC](https://community.inventables.com/t/adjust-feedrate/37429/3 "2017-05-06T01:19:43Z")

</div>

Jtechs version of Grbl

---

<div class="post-metadata">

**Author:** ![picengravertoo](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/picengravertoo/32/45297_2.png) [@picengravertoo](https://community.inventables.com/u/picengravertoo)\
**Post date:** [May 6, 2017, 1:23am UTC](https://community.inventables.com/t/adjust-feedrate/37429/4 "2017-05-06T01:23:01Z")

</div>

There are two versions of J-Tech grbl. Version 9g & and Larry’s 1.0c. Which version does it show after connecting to the com port?

---

<div class="post-metadata">

**Author:** ![PatrickRogers](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/patrickrogers/32/44706_2.png) [@PatrickRogers](https://community.inventables.com/u/PatrickRogers)\
**Post date:** [May 6, 2017, 1:32am UTC](https://community.inventables.com/t/adjust-feedrate/37429/5 "2017-05-06T01:32:16Z")

</div>

Jtech 9g

---

<div class="post-metadata">

**Author:** ![picengravertoo](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/picengravertoo/32/45297_2.png) [@picengravertoo](https://community.inventables.com/u/picengravertoo)\
**Post date:** [May 6, 2017, 1:50am UTC](https://community.inventables.com/t/adjust-feedrate/37429/6 "2017-05-06T01:50:49Z")

</div>

You need to make these changes to the grbl settings to increase the axis movement speed & performance.

$0=30 (step pulse, usec)  
$1=255 (step idle delay, msec)  
$11=0.005 (junction deviation, mm)  
$120=6000.000 (x accel, mm/sec^2)  
$121=6000.000 (y accel, mm/sec^2)

Also engraving at a 45D angle will run smoother/faster.

There is a MultiMode grbl version that can be downloaded from here:

[https://community.inventables.com/t/xcarve-jtech-grbl-update-11-12-2016/28943](https://community.inventables.com/t/xcarve-jtech-grbl-update-11-12-2016/28943)

There is a link for setting up PicSender for it there also.