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### Author Topic: Is there a way to slow the speed of x and y  (Read 1074 times)

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#### Billy De

• 92
##### Is there a way to slow the speed of x and y
« on: October 03, 2017, 12:54:40 PM »
Hi...Started to experiment with some brass....The x and y move too fast for the brass.... I have tried slowing the feed rate....
Other than Motor Tuning.....How can I slow the x and y movement........?

Billy

#### joeaverage

• 5,207
##### Re: Is there a way to slow the speed of x and y
« Reply #1 on: October 03, 2017, 01:54:43 PM »
Hi,

G1 X...Y....F10   The F word is the feed rate, in this case 10 units, whatever units are active, per minute.
Also FRO, that is feed rate override, lower right of main screen.

Manuals work best when read, usually more than once.

Craig
My wife left with my best friend...
and I miss him!

#### Billy De

• 92
##### Re: Is there a way to slow the speed of x and y
« Reply #2 on: October 03, 2017, 03:01:40 PM »
The Tool Setings In Lazy Cam....Ughhhhh I keep forgetting and Thank you for the PDF ! ! ! !

#### Billy De

• 92
##### Re: Is there a way to slow the speed of x and y
« Reply #3 on: October 04, 2017, 08:25:56 AM »
Question...Since we basically cut everything at a depth of either .125 or .1....I would like Z to start lets say .5" above the "0"
would it be better to offset the Z height in Mach or Just add .5 to the tool depth....so if I were to engrave something at .125....the tool depth would be .625..... we basically ...unless its a thicker plate.....engrave at those 2 depths.... I know its a matter of personal preference, just trying to get an opinion...We have a Zero Tool on the Dhalgren and Adjust the bit by a gauge on the spindle ........
Just wondering what would be a more practical setting for the CNC........Thank you.....Billy

#### joeaverage

• 5,207
##### Re: Is there a way to slow the speed of x and y
« Reply #4 on: October 04, 2017, 09:09:32 AM »
Hi,
as you say it is a matter of preference.

A common procedure is to touch off to the material surface and zero the Z work co-ord. Half an inch above the material is 0.5
and a 1/8 inch cut is -0.125. The rule here is any positive Z is above the work (safe) and you can use G0 (rapids or traverse) to move around.
Any negative Z is cutting ie spindle at speed S, moves are G1 at feed rate F.

I find it simplest and therefore least confusing. As it turns out operator confusion is by far and away the most common cause of crashes. Any
procedure that minimises confusion is worthwhile.

Craig
My wife left with my best friend...
and I miss him!

#### Billy De

• 92
##### Re: Is there a way to slow the speed of x and y
« Reply #5 on: October 04, 2017, 09:19:24 AM »

#### joeaverage

• 5,207
##### Re: Is there a way to slow the speed of x and y
« Reply #6 on: October 04, 2017, 09:43:16 AM »
Hi,
if the material allows the use of an ohmic probe touching off is so simple and accurate. Probing has become for most operators the technique of
choice.

If the material is non conductive a small piece of metal of known thickness and connected via a flexible wire to your controller is laid on the work surface.
Either an on-screen probe button or and MDI G31 probe code is issued and the spindle (not running) lowers until contact is made with the metal.
The Z co-ord is set to the gauge thickness of the metal.

If the work piece is conductive but is isolated from the frame of the machine a wire from the conductive surface is connected to your controller.
Probe contact occurs when the tip of the tool which is clamped with metal collets in the spindle which is in turn earthed to the frame of the machine.
This is a common procedure for me when I make circuit boards. One probe wire is clipped to the top copper surface of the circuit board blank
and the other wire is clipped to the spindle shaft with an alligator clip. The probe input of my controller detects the short that occurs when the tip
of the tool touches the circuit board blank. In this case the gauge thickness is zero, ie the Z work co-ord is set to zero, easy.

Craig
My wife left with my best friend...
and I miss him!

#### Billy De

• 92
##### Re: Is there a way to slow the speed of x and y
« Reply #7 on: October 04, 2017, 10:11:32 AM »
Thats how we set the Dahlgren

#### Billy De

• 92
##### Re: Is there a way to slow the speed of x and y
« Reply #8 on: October 04, 2017, 02:29:52 PM »
Getting the hang of this now....Like OSX & Windows,  operate pretty much the same, just a wee bit different language...
Got my plastic tool set .....Cut Depth -.045....Testing going good....Thank you again ! ! !...
.