Poor cuts: Jagged and rounded cuts on MH 871-MK2MH 871-MK2 Cutting vinyl
Posted 12 June 2012 - 06:56 AM
Here's what I've done:
I've set the blade depth so there is just a smidge sticking out. Less than a credit card. Feed rate is 50cm/s and pressure is 110g. For what it's worh, the test print of a star is coming out OK. The points are sharp.
Images, see matt for scale:
Posted 12 June 2012 - 07:02 AM
Posted 12 June 2012 - 07:45 AM
Thanks for the help. I am not convinced there is too much blade. I did try your test, and it makes light marks on the wax paper, but the lines do not show through on the back. By your description, it sounds like it's already perfect.
Posted 12 June 2012 - 07:46 AM
Check your offset.
Jay, how do I check the offset? I can jog the machine round, and there are feed rate and cutting for params that I can change, but that's the size of it, so it seems.
Posted 12 June 2012 - 07:49 AM
Posted 12 June 2012 - 08:14 AM
Posted 12 June 2012 - 12:11 PM
Blade barely visible - blade will cut through vinyl but not backing material when pressed firmly against material
Result: I can cut out a shape w/out going through the vinyl. I've tried running the machine between 100g and 250g and it will not cut through the vinyl.
More blade showing - blade will cut through entire first layer of vinyl, but not scratch second layer
Result: Shapes fully cut, no marks on wax paper, poor quality cut though.
Posted 12 June 2012 - 12:21 PM
Make sure the carriage head is firmly in the track. Make sure there are no vinyl pieces stuck in the blade holder.
Posted 12 June 2012 - 04:16 PM
Thanks for the tips, I did end up ajdusting the offsets and now the cuts I am getting now are pretty square. I also talked to Kevin as US Cutter who was very helpful. He suggested the same thing with the offsets and explained where to modify them in software.
The lines are still a little jagged, but it may be good enough for my purposes. Any way to clean up the jaggies? Is it because the blade itself is vibrating?
Posted 12 June 2012 - 04:20 PM
What kind of vinyl are you cutting there?
Posted 12 June 2012 - 04:45 PM
Just cutting regular 2 or 3 mil vinyl. Can't remember the thickness. I don't know that the blade is vibrating, it's just a guess. I get jagged lines on the straights too, which makes me think it's a hardware problem and not a software problem. This may well be the nature of the machine I got. Below I've attached an image of a horizontal cut plotted on the Y axis I did lubricate the blade with graphite so everything is smooth as butter as far as the mechanism itself goes.
Posted 12 June 2012 - 04:58 PM
Posted 13 June 2012 - 07:38 AM
In short, if the software sends a command like PD X100 I would expect the plotter to try to draw a striahgt line w/out intteruption until recieving the next command.
I'll do some testing a bit later.
Posted 13 June 2012 - 08:49 AM
Posted 13 June 2012 - 04:32 PM
Posted 13 June 2012 - 04:39 PM
Posted 13 June 2012 - 05:04 PM
Posted 13 June 2012 - 05:14 PM
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