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Topics - PhilMC

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BenCutLaser / Laserbot Marlin (CONTINUED) Plywood (CLOSED)
« on: October 07, 2019, 11:49:08 AM »
in case someone may find this useful I am following on from my previous posts getting my Laserbot working and becoming acquainted with Ralph's Bencutlaser software.
Thanks again Ralph for your help in getting going...

The Laserbot has been moved to a hut in the garden and I have been experimenting with cutting 3 mm plywood.
My first step was to set up an air-assist.
This consisted of:
  • a small aquarium pump and tubing
  • a reservoir (small glass jar with a plastic lid)
  • a piece of custom metalwork (see picture)
I found some useful bits of rigid plastic tubing which just fitted inside the flexible tubing that came with the aquarium pump, inside disposable spray bottles that had held surface cleaning fluid.

To reduce pulsing and vibration I constructed a reservoir by putting two pieces of the rigid tube through holes drilled in the bottle lid and attached the unit in line with the pump. This worked remarkably well.

BenCutLaser / Laserbot Marlin (CLOSED)
« on: May 12, 2019, 11:21:45 AM »
Hi there
In have a question about the Laserbot and the Marlin firmware you provide.
I am using windows 10 and BCL 3.2a and have them working OK.
Here is the intro to the firmware:

Code: [Select]
( BenCutLaser (c) 2016-2018 All Rights Reserved )
( Developed by Ralph Freshour and Paul Henty )
( )
( Connected to COM6 @ 115200 baud )
echo:Marlin 1.1.0-RC8 FA BL
echo: Last Updated: 2016-12-06 12:00 | Author: BenCutLaser 1.8.4
Compiled: Mar 27 2017

I want to cut out some thin plywood so I am experimenting with paper first of all.
My laserbot is missing bits of lines and small objects when cutting. It looks to me like the laser is missing beginnings of lines, so I guess there is some delay in bringing the laser up to full power.

Comments on other forums show this is a common problem which was originally was blamed on Makeblock software but since it also happens with the BCL kit I guess that it is down to electronics!.

I tried put a delay (dwell) into the gcode BCL produced as in the snippet below
Code: [Select]
( Body )
G01 X0027.4732 Y0207.4615 F1000
M04 P191 ( [color:DarkGray] )
G04 P300
G01 X0101.7079 Y0207.4615 F500
G01 X0064.5906 Y0170.3442 F500
G01 X0027.4732 Y0207.4615 F500
M4 P0
( end Polyline 0039 )  ( UserComment )  ( polyline 0039 )

G01 X0155.3798 Y0170.3538 F1000
M04 P191 ( [color:DarkGray] )
G04 P300
G01 X0192.4875 Y0207.4615 F500
G01 X0118.2721 Y0207.4615 F500
G01 X0155.3798 Y0170.3538 F500
M4 P0
( end Polyline 0036 )  ( UserComment )  ( polyline 0036 )

But to no effect.
I guess that facility was not part of Marlin at that time.

Do you have any advice....
 Could I perhaps upgrade the Marlin from your version and compile a new firmware file, though if so I need a few pointers as to what was in your .h file etc and some suggestions as to the best way to go about it.

It might be that it would be better to replace the electronics!!


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