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Author Topic: Homing help  (Read 6037 times)

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Re: Homing help
« Reply #10 on: December 15, 2011, 10:14:24 AM »
I already tried the roadrunner gcode without a bit or anything just to see if it worked
It did run the code but the whole thing was maybe an inch square and the most
so I'm guessing there is some kind of scaling issue I have to deal with or is that how big the roadrunner actually is?

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Re: Homing help
« Reply #11 on: December 15, 2011, 11:02:01 AM »
I looked at your xml and native units are set to mm so I presume thats what you want?
If you have the steps per unit set correct for motor tuning then all will be fine. The reason the roadrunner is tiny is the code is in inch but there is no G20 at the start telling Mach to use Imperial units, so if you put a M20 on the first lne of code it will run proper size. Remember though you will need to set back to metric with a G21, you could put that on the line before the M30 in the code and it will set to metric automatically as you end the file.
Hood
Re: Homing help
« Reply #12 on: December 15, 2011, 11:22:18 PM »
Thanks Hood
I have no idea how to go about this but I will do my best to find out how
I looked at the code and see nothing of what you mentioned
Is there a resource for all the different codes and how to use them?

Thanks
Re: Homing help
« Reply #13 on: December 16, 2011, 12:08:50 AM »
Ok I added g20 to the begining of the file and now it seems to be way to big
Maybe it was meant for a bigger table?
Mine is only 7 inches by 7 inches (Zentool 7x7)

 

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Re: Homing help
« Reply #14 on: December 16, 2011, 02:53:02 AM »
According to the extents on the Toolpath page the roadrunner is 7.7" x 6.3" see screenshot.

If you click on the G Code button on the main page of Mach you will get a list and description of G Codes.

Are you meant to be set up in mm as default units or will you work in imperial units normally?
Hood
Re: Homing help
« Reply #15 on: December 16, 2011, 02:59:50 AM »
The only reason I have it in mm is because thats the way the video was set up
I tried changing to inches and it was still to big
sorry for all the trouble
guess I have lots of reading to do

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Re: Homing help
« Reply #16 on: December 16, 2011, 03:03:29 AM »
Ok set the native units to inch if thats what you will normally use then you will have to set your steps per unit accordingly. If you tell me how many microsteps your drive has, if you have gearing between motors and screws and also the pitch of the screws I will let you know the steps per unit.
Hood
Re: Homing help
« Reply #17 on: December 16, 2011, 03:12:45 AM »
Haha, ok, I'll have to get back to you on that as I have no clue
All I know is I have the zentool 7x7 kit http://www.zentoolworks.com/product_info.php?cPath=14&products_id=74
and all the accessories that came with it
Re: Homing help
« Reply #18 on: December 16, 2011, 03:21:33 AM »
Ok I have  Nema 17 motors
M8 x 1.25 Stainless Steel Lead Screws with ball bearing end support
and this is my motor driver http://www.zentoolworks.com/product_info.php?cPath=16&products_id=111
no gears between motor and screws
hope thats the info your looking for
« Last Edit: December 16, 2011, 03:36:24 AM by RiffRaff »

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Re: Homing help
« Reply #19 on: December 16, 2011, 05:19:48 AM »
Will need to know what microstepping you have the drive set to, it can do full, half, 1/8th, 1/16.
Also just to confirm, you are wanting to use imperial?

Hood