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Post by BigMoose on Jan 16, 2018 14:03:05 GMT -5
Ok I got My new AR8 Pro+ all set up and hooked to power and dust collection. I went to do a fly cut on the table as recommended and well it aint pretty. I got a lot of burning and some ridges. I was using Amana RC-2250 1.5" bit running at 14,000RPM set at 480IPM per Amana tools chart for that bit on MDF. Bit was brand new and aftwards I noticed a buildup on it which dont seem right. I started with a cut of .02" bit it seemed to be rubbing and not cutting so I upped it it .04" cut. I stopped the cut several times to try and let the bit cool. I also noticed ridges in the board after the cut. I am sure I did something wrong but dont know what. Any help is much appreciated. I have a feeling Ill need to tram the spindel so I will need to look up the best way to do that on these units. Thanks.    . |
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Post by gerry on Jan 16, 2018 16:54:10 GMT -5
There is a file on your B18 controller that is setup for surfacing your spoil board. Works great.
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Post by chuck26287 on Jan 16, 2018 17:41:16 GMT -5
Ok I got My new AR8 Pro+ all set up and hooked to power and dust collection. I went to do a fly cut on the table as recommended and well it aint pretty. I got a lot of burning and some ridges. I was using Amana RC-2250 1.5" bit running at 14,000RPM set at 480IPM per Amana tools chart for that bit on MDF. Bit was brand new and aftwards I noticed a buildup on it which dont seem right. I started with a cut of .02" bit it seemed to be rubbing and not cutting so I upped it it .04" cut. I stopped the cut several times to try and let the bit cool. I also noticed ridges in the board after the cut. I am sure I did something wrong but dont know what. Any help is much appreciated. I have a feeling Ill need to tram the spindel so I will need to look up the best way to do that on these units. Thanks. . A couple things... first, the Amana recommended starting point for the RC2250 for MDF is 18000 RPM @ 480 IPM (for a chip load of 0.014"), not 14000 RPM. Second, I have the older AR8 Pro, so I don't know for sure, but unless the AR8 Pro+ runs faster than the older AR8 Pro (and the website specs are listed wrong), your machine maxes out at 200 IPM, and can't even come close to the 480 IPM recommended by Amana. I don't know what happens if you set a cut up in the software, telling it to cut at 480 IPM, but if we assume it would run at the max speed available of 200 IPM (that's a major assumption, as a software setting outside machine capability could cause all kinds of erratic behavior), you were running at approximately 14000 RPM, at 200 IPM, for a chip load of about 0.007". You did have 233 set on the VFD display, right? You do remember that even though you set the RPM value in the software, it doesn't control the RPM... you have to manually dial the RPM in on the VFD display. If you didn't set the VFD correctly, you may have had a really wonky RPM set, and scorched the inserts immediately on starting the cut, and just burned it all through the cut. The reason I ask this is I just received the RC-2250 Saturday, and did my first spoil board surfacing with it last Sunday. Your setting weren't significantly different from what I used. Since we can't come close to getting a chip load of 0.014" when running at or near 18000 RPM (this requires that 480 IPM feed setting we can't achieve), I chose to adjust RPM down a little to 15000, and adjust chip load down a bit more to 0.005". I could then run my surfacing at 15000 RPM @ 150 IPM for the 0.005" chip load. I have to say the cut was beautiful. I even ran a side-by-side comparison between the Amana 45566 1.5" Mortising bit I had been using, an the surface was noticeably smoother from the RC-2250. Those extra two scoring blades on the bottom make a real improvement to surface finish. I would take those inserts off and clean them, then rotate them and re-install them. I would then try to duplicate my results with my settings. I've attached a screen shot of my values/settings. Don't worry yet about any detectable unevenness/ridging, as you can address that by tramming the machine later. Just concentrate on surface finish first.  |
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Post by chuck26287 on Jan 16, 2018 17:48:58 GMT -5
What was your step-over set to? Also... you have a few black "donuts" burned into your spoil boards... did your bit stop traveling and sit momentarily during the cut run?
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Post by BigMoose on Jan 16, 2018 18:23:06 GMT -5
What was your step-over set to? Also... you have a few black "donuts" burned into your spoil boards... did your bit stop traveling and sit momentarily during the cut run? Thanks for the replies. Yea I know the AR8 wont do that speed and I realized I worded it wrong after I posted. I had it set to the 480 in the tool setup for the cut and I knew the machine couldn't do it but I figured set it like they said to and see what happens. Yea RPM was set at the VFD I knew the software didn't control it. I figured dropping the rpms to 14,000 might help but that was not it. The rings are from where I stopped the cut because it was smoking up the place. I have since played with some setting and after cleaning the bit and adjusting stuff I got a much better cut. It was totally my fault not the CNC I got ahead of myself. My step-over was .75". Are you referring to the Mill Plane function. I tried that and it didn't seem to want to work for the whole table. I defiantly have some learning to do with this controller and stuff. I see stuff on the controller that I dont see in the manual. I have used Mach3 before but not this RichAuto controller. So if I had it set to 480 in the tool and the CNC maxes at 200IPM according to the specs there must be a setting I am missing because I timed a pass and it was not at 200 it was more like 160. I am pretty new to all of this and have some but not much experience. |
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Post by BigMoose on Jan 16, 2018 18:38:42 GMT -5
There is a file on your B18 controller that is setup for surfacing your spoil board. Works great. Sorry I got this mixed up in my reply to the other guy. Are you talking about the Mill Plane function? If not what is it called because I may have overlooked it. I tried playing with the Mill Plane function but couldnt seem to get it to work. |
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Post by Deleted on Jan 17, 2018 4:34:17 GMT -5
At 150 IPM and 5400 rpm you'll get the specified chip load for that bit. Using the proper chip load you can actually get chips instead of dust with MDF. Are you using the MDF inserts and not one of the optional ones? Your first try went the opposite direction because of too low feed rate and had a lot of rubbing instead of cutting and therefore the heat and built up edge as well as scoring of the spoil board from the hot gum on the inserts.
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Post by gerry on Jan 17, 2018 15:52:01 GMT -5
The name of the surface file is AR8SFC.MMG. It is in the home directory of my B18 controller. I homed the machine, installed a 1.5 inch surfacing bit, zeroed it to the spoil board, and ran the file. Note that it planes at 90 degrees, which is parallel with the direction of the spoil board. Mine came out beautiful, edge to edge.
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Post by BigMoose on Jan 19, 2018 12:41:03 GMT -5
The name of the surface file is AR8SFC.MMG. It is in the home directory of my B18 controller. I homed the machine, installed a 1.5 inch surfacing bit, zeroed it to the spoil board, and ran the file. Note that it planes at 90 degrees, which is parallel with the direction of the spoil board. Mine came out beautiful, edge to edge. I was finally able to get out to check for that file on my controller and I cant find it. I have attached pics of my Home menu and I will post again with picks of the internal memory screens and there is nothing. I dont know if it is missing or they changed it to notnclude it.   |
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Post by BigMoose on Jan 19, 2018 12:42:01 GMT -5
The name of the surface file is AR8SFC.MMG. It is in the home directory of my B18 controller. I homed the machine, installed a 1.5 inch surfacing bit, zeroed it to the spoil board, and ran the file. Note that it planes at 90 degrees, which is parallel with the direction of the spoil board. Mine came out beautiful, edge to edge. Here is the internal memory.   |
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Post by gerry on Jan 19, 2018 13:31:40 GMT -5
Select RUN/INTERNAL FILE. Here is what I see:  |
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Post by BigMoose on Jan 19, 2018 13:38:50 GMT -5
Select RUN/INTERNAL FILE. Here is what I see: Interesting. I dont have that. |
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Post by gerry on Jan 19, 2018 21:07:31 GMT -5
I'm sure a quick call to Axiom would get you the file. I haven't figured how to copy 'from' the pendant.
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Post by BigMoose on Jan 20, 2018 13:15:00 GMT -5
I'm sure a quick call to Axiom would get you the file. I haven't figured how to copy 'from' the pendant. Yep I sent an email to Craig and he said he had stopped putting it on them until he could rewrite the instructions because of some confusion with the instructions. But he sent it to me and I now have it. So far I can say that the customer support from Axiom has been excellent. They even sent me new t bolts for my clamps that I didn't even know I needed because I had not used them yet. I guess the original supplied bolts where to short for the axiom beds. |
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