**This is assuming you have run the ****laser wizard**** and not using your own custom built pipelines.**

Is Smidyo not calculating accurate times for engraving?

By going into the *Constants *in your dashboard, you can adjust these parameters to fine tune the calculation of the time it takes to engrave.

#### Constant: Laser engraving acceleration

This is the acceleration of the laser head when engraving. It's specified in the unit mm/s2. The calculation also uses the same acceleration, but in inverse to calculate the deceleration when the head reaches the other side of the table.

The standard value of 25000 mm/s2 is for a Trotec Speedy 400.

#### Constant: Laser engraving acceleration

The amount of time in seconds your machine dwells in each corner of the engraving area. This is usually almost 0 for most machines, which is why that's the standard. But it can be set to a small values such as 0.1, or 0.2 for some machines.

#### Constant: Laser engraving overshoot

Most laser engravers move a certain distance past the actual engraving area, to allow the machine to accelerate and decelerate. This constant sets that value, in mm.

## How do I decide these?

At this point, we recommend testing out different values, and seeing what gives the best results for your machine. In the future we plan to offer a lookup-table of these constants for different machines.

If you need help deciding these values, we'll be happy to help out. We're always available in the chat-box.