Messages

4231

General Mach Discussion / Re: Required spindle power

« on: September 28, 2010, 05:07:19 PM »

Kennametal has one on their site if memory is correct.
The Society of Manufacturing Engineers has done studies over the years and so did Cincinnati Millicron ( out of buisness now ).
There are also a few other sites as well. I have done it manualy by finding the shear area and  then finding the generated force. You need to make some assumptions ( like i used the mean average of ultimate tensile / yield / and shear stress  for a material ).
HP=FV/33000  where F=#   V=ft/min ( spindle) then consider motor efficiency , mechanical reducing into it. Just be practical and conservative if applying the results as there are variables which just can't be calculated and are factored based on testing and practical experience over time.

Additionaly there are programs that will caculate required torque, acceleration required  for a given axis based on machine / motor / etc  parameters and you can account for the metal cutting forces . Danier Motion or Superior Electric come to mind for a program. They are different for steppers and servos and you really should have a torque curve for the motor.

Above all .........garbage in =garbage out 

RICH

4232

LazyCam (Beta) / Re: Post GCode stopt functioning

« on: September 27, 2010, 05:40:43 PM »

Post the dxf file.

it just isn't doing what it should

Maybe what your thinking it should do, ( that's a mistake if you have not looked at  the manual  ) or it may be what you are telling LC  .

I think this is what is happening.
Remember that your instructing LC to create code for a machining task based on selection and cut definition. It imports a dwg and if you don't
want to machine the whole  thing then you need to turn off layers and you can't do that at the entity level.

Example:
Import a rectangle which was drawn in cad and saved as a version 12 dxf.
Create an offset of the rectangle in LC.
Now you have two layers, namely the rectangle ( if you created the rectangle on it's owne layer in CAD with that name  ) and also the Offset layer.
So what do you want LC to do with them if you just post code you get code for both layers , if you unenabale / turn off one of the layers then LC will only give
you code for what is enabled and another tap wil be created and posted.

Now, say you select just the rectangle and tell LC what you want LC to do with it ie; maybe just create the code for following the outline, so you post ( LC will
 use defaults which may not be appropriate for your task).
Now, say you want the offset to be machined with the same tool only a deeper cut, then you must tell LC how you want it cut by selecting the tool and definining
how deep you want to cut it. Post code and you will see that another tap version has been written which has the gcode for both machining tasks. 

BTW, You can't do offsets and get posted code with the free version.

RICH

4233

General Mach Discussion / Re: Hot stepper motor

« on: September 27, 2010, 05:31:20 AM »

Please post specific information about your driver as they are all different and also how your motors are wired.
The amp setting needs to be correct. Someone can then have a read of the information and help you.
RICH

4234

LazyCam (Beta) / Re: Setting depth in Lazy Cam

« on: September 26, 2010, 04:38:28 PM »

Kevin,
Just select all the lines you want,then create a tool, you then just apply the cut depth to all the lines and post code.
Note that if you do not set the cut depth then LC will default to some values including feedrate and Z retract which you may not want to use.
All in the manual, take a look at Tutorial #1, don't hack you way through LC. The manual can be found in Memebers Doc's.
RICH

4235

Sieg Machines / Re: Seig X3 configured in INCHES.

« on: September 26, 2010, 01:26:03 PM »

Ron,
Certainly agree, but ........., we live in a world of plug and play. The trouble is most folks don't  understand how each of the parts that make up a system can affect the steps per settting. I see it as a quality issue of the components and the screw example is a good one. Isolation of a component can be difficult and depending on what your looking for, the measurement can be out of the norm for most users. Generally, calculated and then a single test is about all most will do and should there be deviation then confusion comes into play and understandably so.
RICH

4236

CVI MachStdMill (MSM) / Re: How to Enable RPM in MachStd Mill

« on: September 24, 2010, 05:56:15 AM »

Drivertest shows the mach driver version near the top of the info that driver test program displays.

I don't see anything in the driver screen display which shows the version number........

RICH

4237

FAQs / Re: Losing steps or something?

« on: September 23, 2010, 08:13:42 PM »

Gib play will can cause what you are seeing. You are not llikely to see it until XY move is done but it will be some min/max range varying within the range on return to zero. Backlash could also play into it all. Make sure the mechanics are all correct before looking for lost pulses.
RICH

4238

CVI MachStdMill (MSM) / Re: How to Enable RPM in MachStd Mill

« on: September 23, 2010, 07:20:24 PM »

Dave,
Where is the version shown?
Do you mean go to My Computer>Contol Panel> System >Hardware>Device Manager>and look at the properties  of the Mach3Driver in Windows?
RICH

4239

Show"N"Tell ( What you have made with your CNC machine.) / Re: PEN HOLDER FOR MILL DRAWING

« on: September 23, 2010, 04:58:15 PM »

Way to go Sam and even a video.
RICH 

4240

Show"N"Tell ( What you have made with your CNC machine.) / Re: PEN HOLDER FOR MILL DRAWING

« on: September 23, 2010, 06:32:44 AM »

Sam,
Post some pics.The more examples the better. I thought someone had already posted something, maybe it was in a different thread.
RICH