Messages

1

G-Code, CAD, and CAM discussions / Re: Cumulative error in YZ

« on: February 26, 2018, 12:07:12 AM »

I didn't have any machineable wax to test the code for profiling the rotors, so I just grabbed a block of ABS. As I mentioned there was no problem with the ABS samples, it showed up when I was machining the aluminum castings.

2

G-Code, CAD, and CAM discussions / Re: Cumulative error in YZ

« on: February 25, 2018, 08:49:58 PM »

KLJ, thanks for the reply. The error showed up with cast aluminum rotors. I think I have already melted them, but if not I'll take a photo. Some comments have been made about using the shift key to speed travel and creating runaway action, but I don't know if that is the same issue that I experienced. I have another sample to cut with a new profile and I will see if I get the same results.

3

G-Code, CAD, and CAM discussions / Re: Cumulative error in YZ

« on: February 04, 2018, 01:41:49 PM »

These are the two programs. I changed the G17 to G19 but ended up with the same machining error.

4

G-Code, CAD, and CAM discussions / Cumulative error in YZ

« on: February 04, 2018, 12:46:24 PM »

I cast a pair of rotors for a 1/3 scale blower and used Alibre to draw a sample of a half a rotor. I downloaded a copy of Freemill and generated the G code and was able to cut a sample in ABS. I machined both directions, XY and YZ since there is no roughing cut program in Freemill and milled a pair of rotors to test. I mounted a casting and ran on the XY plane and ended up with the correct  profile, but when I loaded the YZ program the tool starts correctly by skimming the surface, but then lowers slightly in Z with each subsequent pass and starts to machine a tapered shape. The DRO's show the same readout as the G code program, but if I stop and return to  zero the Z axis I get a reading that represents the amount the tool plunged beyond what was programmed and what the DRO indicated.
Any thoughts?
I re-tuned all three axis and they were accurate.

5

Tangent Corner / Aratron 300-30 EDM

« on: October 27, 2016, 03:30:36 PM »

This unit followed me home, but came with scant paperwork. I made three holes with it after some troubleshooting that didn't identify the reason I own it and then it blew some fuses in the control board. I get nothing through G**gle and haven"t been able to find any schematics or manuals. It's a 1988 model and as near as I can tell no longer made, but it was not trashed so I thought it was would complement the CNC  path I am on.
Does anyone have experience with this unit or electrical schamatics of the servo control board?

6

Show"N"Tell ( What you have made with your CNC machine.) / Re: Threading

« on: August 12, 2016, 12:07:46 PM »

I added the intake domes to this project. They are cast in silicon bronze and and initially machined on the lathe, then transferred to the mill for cutting the dogs and the thread milling.

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Newfangled Mill Wizard / Re: combining arc cuts

« on: April 25, 2016, 09:23:14 AM »

Got it. Thanks C.

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Newfangled Mill Wizard / Re: combining arc cuts

« on: April 20, 2016, 01:19:44 PM »

Thanks c_livengood,
I'll give it a try when I go to the shop.

9

Newfangled Mill Wizard / Re: combining arc cuts

« on: April 19, 2016, 09:53:59 PM »

I have been cutting the three arcs seperately. I would just like to be able to leave the machine and have it cut all three.
So is there a way to combine the wizard programs that have been saved? Other than manually entering the wizard code?

10

Show"N"Tell ( What you have made with your CNC machine.) / Re: Threading

« on: April 19, 2016, 02:53:54 PM »

I would like to combine the three angular slots into a single program. They were created individually in Newfangled Wizard, but require closing and then reopening for each subsequent slot. Any thoughts?