Author Topic: 2.0 watt A5 BCL engrave test burns (OPEN)  (Read 303 times)

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Re: 2.0 watt A5 BCL engrave test burns (OPEN)
« Reply #15 on: December 02, 2017, 06:40:54 PM »
Can you post a photo of the engraving?
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ggallant571

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Re: 2.0 watt A5 BCL engrave test burns (OPEN)
« Reply #16 on: December 02, 2017, 07:20:43 PM »
If the acceleration is very slow it would take the firmware a large amount of time to get the laser head up to speed. During this period the laser head would be moving slowly causing darker burns. When it is in the 900 - 1500 mm/min range it would burn as expected, and after that it would be light. It is also possible that the head never gets to the set speed before it has to start slowing down. Towards the end it would be dark again.

If you do not know how to dump the parameters it means you never explicitly set them up. I believe BCL and T2 have options to do the dump. If not, connect to the controller using a terminal emulator and type "$$" and the prompt.
« Last Edit: December 02, 2017, 08:50:15 PM by ggallant571 »
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Re: 2.0 watt A5 BCL engrave test burns (OPEN)
« Reply #17 on: December 02, 2017, 07:38:22 PM »
See attachment...
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krypton

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Re: 2.0 watt A5 BCL engrave test burns (OPEN)
« Reply #18 on: December 03, 2017, 04:53:45 PM »
I'll post some pictures, and the Grbl results tomorrow as it is getting late and I have a few things going at the moment. A few months ago I did design a gear in cad and burned it. My son was amazed at the results. since then I have burnt several simple gaskets without a hitch. Wanted them to be rubber but was afraid of the fumes so used light card stock. I was waiting for the BCL image software to be released. I've run tests on slate and found it to be good results.............I have not fired the laser up today........

Thanks for your help,
Will definitely get some pictures on tomorrow............

Krypton....................... 

krypton

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Re: 2.0 watt A5 BCL engrave test burns (OPEN)
« Reply #19 on: December 05, 2017, 12:45:32 PM »
Hi all,

I'll post  the requested info. I did re-burn the picture to a larger size and the burnt areas were diminished some what.

 Guess i'll start with the Grbl dump until I can figure out why I can't attach a 175kb file.

( BenCutLaser (c) 2016-2017 All Rights Reserved )
( Developed by Ralph Freshour and Paul Henty )
( support@BenCutLaser.us )

( Connected to COM4 @ 115200 baud )


Grbl 1.1e ['$' for help]



$0=10
$1=25
$2=0
$3=0
$4=0
$5=0
$6=0
$10=1
$11=0.010
$12=0.002
$13=1
$20=0
$21=0
$22=0
$23=0
$24=100.000
$25=1000.000
$26=250
$27=1.000
$30=255
$31=0
$32=1
$100=80.000
$101=80.000
$102=80.000
$110=4000.000
$111=4000.000
$112=6000.000
$120=800.000
$121=800.000
$122=5000.000
$130=400.000
$131=300.000
$132=200.000

Work Coordinate System (WCS) offsets from Machine Coordinates.
G54 must be the default (showing offset data).
[G54:-0.5000,-6.0000,0.0000]
[G55:0.0000,0.0000,0.0000]
[G56:0.0000,0.0000,0.0000]
[G57:0.0000,0.0000,0.0000]
[G58:0.0000,0.0000,0.0000]
[G59:0.0000,0.0000,0.0000]
[G28:0.0000,0.0000,0.0000]
[G30:0.0000,0.0000,0.0000]
[G92:0.0000,0.0000,0.0000]
[TLO:0.0000]
[PRB:0.0000,0.0000,0.0000:0]


Thanks,
Krypton...............

krypton

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Re: 2.0 watt A5 BCL engrave test burns (OPEN)
« Reply #20 on: December 05, 2017, 12:51:01 PM »
That is the original picture. Not sure I can get the others on as too large.
Krypton................

Can you post the test pattern matric photo for this laser tool? You did this in Gray Scale?
« Last Edit: December 05, 2017, 07:10:26 PM by Administrator »

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Re: 2.0 watt A5 BCL engrave test burns (OPEN)
« Reply #21 on: December 05, 2017, 07:09:09 PM »
Did you set the BCL 1.1e Grbl settings by selecting 1.1e and clicking the link? See attachment.

I don't see in your Grbl settings that you did this.
« Last Edit: December 05, 2017, 07:55:04 PM by Administrator »
Admin -- Ralph -- support @ BenCutLaser dot us
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BCL Paid license: $49.95
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krypton

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Re: 2.0 watt A5 BCL engrave test burns (OPEN)
« Reply #22 on: December 06, 2017, 02:10:54 PM »
Sorry Ralph, I did not update the Grbl to the factory settings by using the link. I just finished doing that after I reviewed your troubleshooting post. Do I need to repeat this when loading the BCL program? Should I save the settings?

I will try to re-burn the photo after I redo the tool perimeters and see what improvements I have

Thanks,
Krypton................

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Re: 2.0 watt A5 BCL engrave test burns (OPEN)
« Reply #23 on: December 06, 2017, 02:56:31 PM »
The values get saved into the controller board when you run them, so you only need to set the 1.1e settings (clicking the link) one time.
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krypton

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Re: 2.0 watt A5 BCL engrave test burns (OPEN)
« Reply #24 on: December 06, 2017, 04:32:55 PM »
OK Ralph, thanks. I thought it would be that way.
I did re-calibrate the tool, and knocked the speed to 6000, 100%, at .2 dia. and ran the program again. This time the result was darker and burnt spots again. Some were craters in the MDF, about 3 to 4 of them. I did note in the G-code generated there lines indicating speed at 6000 as well as 3000. I'm wondering if the wrong info is being sent like wrong tool parameters. Small section G-code :

X0002.2323 S0
X0002.3661 S255
X0002.6473 S0
X0000.3527 Y0001.4588 F3000
X0000.6339 F6000
X0000.6496 S255
X0000.6575 S0
X0000.6811 S255
X0000.7362 S0
X0000.8071 S255

 I guess I'll do some more reading and try again tomorrow. Starting to get frustrating to say the leased.

Thanks,
Krypton................

ggallant571

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Re: 2.0 watt A5 BCL engrave test burns (OPEN)
« Reply #25 on: December 06, 2017, 05:05:27 PM »
Reading the gcode I see speed changes of 3000 to 6000 mm/min over a distance of 0.3mm. That isn't going to happen!!! Try burning/etching the sample square patterns and get a feel for what the machine can do. Remember, a poor 16MHz 8-bit processor has to receive and interpret the gcode along with process the stepper motor step pulses. Internally it uses floating point math (without fp hardware).
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Re: 2.0 watt A5 BCL engrave test burns (OPEN)
« Reply #26 on: December 06, 2017, 05:39:44 PM »
I would still like to see a photo of the test pattern matrix you are using to calibrate. If that looks 'ok' then your engravings should look 'ok'. You're not getting the results you are expecting on your engraving(s) so I'd like to see what your matrix test pattern looks like.
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krypton

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Re: 2.0 watt A5 BCL engrave test burns (OPEN)
« Reply #27 on: December 07, 2017, 12:40:32 PM »
Afternoon,

I guess I'll start the day withe the picture of the test burn I used as a matrix. There are two burns there the left one was at the 8000 rate and the right one is the 6000 rate.

Before I loaded the factory Grbl i did the small block burns at 1000 rate or lower and power around 45. they  were way too dark with a dark outline on the right edge. Seemed like the laser stopped moving but beam was not turned off for a second. After I post this I'll run some tests at lower speeds. I agree with ggallant571 that the speeds are much too high.

Thanks, krypton.........

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Re: 2.0 watt A5 BCL engrave test burns (OPEN)
« Reply #28 on: December 07, 2017, 06:25:49 PM »
Is that your test pattern matrix? I can't see 16 small squares of different shades? This Gray scale? Your test matrix should be rectangular in shape...I don't see that in your test pattern.
This might be due to your beam diameter, which is probably fine, but I don't see any shading here at all.

The photo of your engraving on the MDF material looks extremely coarse and rough on the surface. Is that the case or is the photo misleading?

If the surface is that coarse, your not going to get good results.
« Last Edit: December 07, 2017, 06:28:29 PM by Administrator »
Admin -- Ralph -- support @ BenCutLaser dot us
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krypton

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Re: 2.0 watt A5 BCL engrave test burns (OPEN)
« Reply #29 on: December 10, 2017, 12:15:41 PM »
Back at it again,

The MDF board is not working too good.I believe we are all getting confused as to what is happening on this end.

I started all over from scratch with Maple wood this time. I started with image tool settings as follows:

Dark feed rate    800
Light feed rate  1200

Power level @ 50%

Beam dia. @ 25

I used the "Burn dark block" button and burned the upper right hand bock as shown in the picture.
Then used the "Burn light block" button and burned the block just below that block.

Then I used "Burn test pattern" button to burn the large pattern on the bottom to the left of the 2 small test burns.
I noticed that there are missing sections in the test pattern. So at that point I decided to re-burn the test pattern again above the first burn. The second burn seemed to exhibit the same missing line burns. What is causing this? I'm missing the boat here some where. Is this pattern I'm to place the pink matrix on to calibrate the tool?

Somewhere I'm missing something. Also what is the max feed rate that the nano can handle?

Thanks,
Krypton..............