VERICUT Users' Forum

ffcut

Member

Registered: 2009-11-04

Posts: 16

Predicting cycle time with Look Ahead func. in HSM controls

Hi guys,

Is this possible to predict the behaviour of the high speed controllers? (In Look-Ahead wise)

I mean that if the controller is using G05 P10000 for reading 1000 lines in advance and reducing the speed.

I of course know that if the user uses M251 for roughing the time is different and M250 for finishing time is different again(for Makino) but just wanted to check.

Thanks

vhubbard

Beta User

From: Dallas, TX

Registered: 2004-11-11

Posts: 222

Website

Re: Predicting cycle time with Look Ahead func. in HSM controls

To make times more accurate and better simulate HSM It would need to support the following
1. Axis Accel/Decel in Feed mode that can be changed on the fly.  Also a separate Feed vs. Rapid Accel/Decel setting.  Probably the most important capability for HSM time calculation.
2. Following error tolerance  M250, M251 etc  Each machine vendor has their own set of M & G codes for setting these tolerances.  How close is close before starting the next move.  Effects accel/decel calculations.
3. Look ahead processing of Macro values.  In some High speed mode settings a Variable can be read before its value has been set by a previous move.
4. Support commands that pause High speed look ahead.   The commands that cause the machine to physically catch up before look ahead processing continues.  Used to avoid processing problems on the machine.