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Cutting Depth and O...
 
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Cutting Depth and Offsets

12 Beiträge
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(@remotruker)
Beiträge: 27
Eminent Member
Themenstarter
 

First day on the CNC was a success!

Some questions:

Question #1
I have the cut depth set in VCarve to go to 8mm, but when actually measured, it goes into the spoil board much deeper than anticipated and a total depth of 12.5mm

Any Ideas?

Question #2
When setting up the job in UCCNC there is some kind of offset that makes it hard to work with small materials.
I set my Zero points for X and Y and the job is offset into the material considerably farther than designed in VCarve. It is as if there is some kind of minimum distance from the work the offsets must be...

Stepcraft 2 420
500 Watt Spindle
3D Printing System
3d Probe
T-Slot Table

Tooling:
1/8" 60 Deg 4 Flute V Bit
1/8" 4-Flute Square Nose End Mill
1/8" 2 Flute Ball Nose End Mill
1/16" 2 Flute Ball Nose End Mill

UCCNC and VCarve Pro

Total Newbie!

 
Veröffentlicht : 15/11/2015 5:26 am
(@peterg1000)
Beiträge: 389
Reputable Member
 

Hi,

I may be stating the obvious, but you did remember to zero the Z axis with the tool just touching the workpiece didn't you!!

Under the "Offsets" tab check that the tool offset and G92 offsets are at zero as well.

Peter

SC 420/2, Industrial VFD spindle from StoneyCNC
UC100 + UCCNC
Cut2D, Autosketch10, Draftsight, Eagle 9.5.1

There is no problem, however simple, that cannot be made more complicated by thinking about it.

 
Veröffentlicht : 15/11/2015 11:38 am
(@remotruker)
Beiträge: 27
Eminent Member
Themenstarter
 

Yes, I Zero'd the Z axis after the bit change.

I was poking around in the settings and noticed there is no tool offset. Is this something I need to set? Seems like it would change constantly depending on how deep the bit goes into the collar.

Stepcraft 2 420
500 Watt Spindle
3D Printing System
3d Probe
T-Slot Table

Tooling:
1/8" 60 Deg 4 Flute V Bit
1/8" 4-Flute Square Nose End Mill
1/8" 2 Flute Ball Nose End Mill
1/16" 2 Flute Ball Nose End Mill

UCCNC and VCarve Pro

Total Newbie!

 
Veröffentlicht : 15/11/2015 8:48 pm
(@peterg1000)
Beiträge: 389
Reputable Member
 

Like you I have been setting the Z axis to zero when the tool just touches the workpiece - my tool offset is zero and the z axis behaves correctly when drilling or milling with pcb-gcode generated Gcode file. So I would suspect something is not set correctly in Vcarve raher than UCCNC.

I have Cut2D, but believe that the setup philosophy is the same as in VCarve. Have you reviewed this page in the manual? It might hold the answer to your problem.

SC 420/2, Industrial VFD spindle from StoneyCNC
UC100 + UCCNC
Cut2D, Autosketch10, Draftsight, Eagle 9.5.1

There is no problem, however simple, that cannot be made more complicated by thinking about it.

 
Veröffentlicht : 15/11/2015 11:56 pm
(@remotruker)
Beiträge: 27
Eminent Member
Themenstarter
 

Ok, I have been doing some reading about the number of Steps per Unit. Mine is set at 200, but I'm reading on the board elsewhere that they are using 133.33 for the larger Stepcraft 840.

Would you mind sharing what your UCCNC is set to?

Stepcraft 2 420
500 Watt Spindle
3D Printing System
3d Probe
T-Slot Table

Tooling:
1/8" 60 Deg 4 Flute V Bit
1/8" 4-Flute Square Nose End Mill
1/8" 2 Flute Ball Nose End Mill
1/16" 2 Flute Ball Nose End Mill

UCCNC and VCarve Pro

Total Newbie!

 
Veröffentlicht : 16/11/2015 6:01 am
(@tikka)
Beiträge: 105
Estimable Member
 

I think Stepcraft 1 models and 210 has 200 steps per unit. As described here

Stepcraft 600SF (version 1) parallel port
Proxxon IBS/E
Mach3
devCad Cam Pro; devWing Cam; devFus Cam; Profili Pro 2

 
Veröffentlicht : 16/11/2015 7:22 pm
(@peterg1000)
Beiträge: 389
Reputable Member
 

Hi,

It would appear that your machine profile is that for the original Stepcraft, not the series 2. No wonder you are struggling!!!

I think all the original machines had 200 steps per unit (mm), whilst all the series 2 machines 133.33 steps per unit (3mm leadscrew).

My machine is an SC420/2 and the screen shots below show the axis configuration for that machine. Of course the backlash settings are unique to my machine - yours will be somewhat different. I have also attached a copy of my profile file for your information - remember that your macro file will need to be named to match the profile name.

Hope these are of some use to you - if your machine is a 420/2 you could use the profile direct, otherwise edit a COPY of your original.

Peter

SC 420/2, Industrial VFD spindle from StoneyCNC
UC100 + UCCNC
Cut2D, Autosketch10, Draftsight, Eagle 9.5.1

There is no problem, however simple, that cannot be made more complicated by thinking about it.

 
Veröffentlicht : 16/11/2015 8:29 pm
(@peterg1000)
Beiträge: 389
Reputable Member
 

Seems the profile file got lost somehow - I'll try again in this post

LATER EDIT:-

Failed again - can someone educate me, everything seemed to be ok.

SC 420/2, Industrial VFD spindle from StoneyCNC
UC100 + UCCNC
Cut2D, Autosketch10, Draftsight, Eagle 9.5.1

There is no problem, however simple, that cannot be made more complicated by thinking about it.

 
Veröffentlicht : 16/11/2015 8:33 pm
(@remotruker)
Beiträge: 27
Eminent Member
Themenstarter
 

Thanks for the help Peter! I will give these a shot hopefully this weekend!

Stepcraft 2 420
500 Watt Spindle
3D Printing System
3d Probe
T-Slot Table

Tooling:
1/8" 60 Deg 4 Flute V Bit
1/8" 4-Flute Square Nose End Mill
1/8" 2 Flute Ball Nose End Mill
1/16" 2 Flute Ball Nose End Mill

UCCNC and VCarve Pro

Total Newbie!

 
Veröffentlicht : 17/11/2015 2:49 am
(@peterg1000)
Beiträge: 389
Reputable Member
 

Hi,

I have found out how to send you the 420/2 profile file that eluded me before. Apparently the forum rejects certain file extensions - but doesn't tell which anywhere in the English forum - clever eh!!

I have renamed my profile file as a .txt file and it gets sent ok apparently. Just rename it as a .pro file and it may give you some additional help.

Peter.

SC 420/2, Industrial VFD spindle from StoneyCNC
UC100 + UCCNC
Cut2D, Autosketch10, Draftsight, Eagle 9.5.1

There is no problem, however simple, that cannot be made more complicated by thinking about it.

 
Veröffentlicht : 18/11/2015 6:37 pm
(@rory)
Beiträge: 384
Reputable Member
 

STEPCRAFT 2 steps per unit 133.33

STEPCRAFT 1 Steps per unit 200

so thats why your seeing scaling issue.

 
Veröffentlicht : 19/11/2015 9:37 pm
(@remotruker)
Beiträge: 27
Eminent Member
Themenstarter
 

The new parameters are working great. Thanks again.

Stepcraft 2 420
500 Watt Spindle
3D Printing System
3d Probe
T-Slot Table

Tooling:
1/8" 60 Deg 4 Flute V Bit
1/8" 4-Flute Square Nose End Mill
1/8" 2 Flute Ball Nose End Mill
1/16" 2 Flute Ball Nose End Mill

UCCNC and VCarve Pro

Total Newbie!

 
Veröffentlicht : 25/11/2015 3:52 am
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