Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: Hood on January 04, 2011, 06:28:36 AM
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Below is a list of the things I can think of that are needing sorted in Turn, would appreciate any others you know of.
Hood
Front/Rear Turrets
CSS
G83 (works in Mill but not Turn)
Current Tool DRO should show offset as well as tool number or another DRO should be made for Tool Offset.
Wear and Offset DROs should look at offset number to get which offset to update rather than Tool number
Tool Description label needs to look at offset number rather than tool number
Soft Limits need fixed
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Until the G83 gets fixed for the lathe you can use the lathe drilling Macro done by Melee.
Here is the link and the file contains a description for using it. Can also drill multiple offset holes with it.
http://www.machsupport.com/forum/index.php/topic,15205.msg101682.html#msg101682
RICH
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Rich,
Dolphin will do it for me but the good thing about canned cycles is they are easy and quick to edit.
Another thing that needs sorted is Spindle Override.
Also would be good if FRO actually went to zero (Mill as well)
Hood
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Also the G73 High Speed Peck Drill Canned Cycle.
Tool Path display.
Spindle Override..? What's wrong with it? Seems to work here...
Dan
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Actually, none of the G81 to G89 canned cycles are implemented.
Also, G77 and G78 are not implemented, although appear in the manual.
Dan
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Spindle Override..? What's wrong with it? Seems to work here...
OEM DRO 74 is switched off in Turn, its an easy fix for Brian to do as he has already done it for me but just wanting it in the list so it gets done in the next revision.
Tool Path display.
The toolpath should be getting updated in Rev4 but is there anything specific that is broken?
Hood
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Get Threading fixed
it would be neat to have an easy way to "Pick up" a thread(s).
scott
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Threading, as far as I am aware, is fixed, do you know otherwise?.
Thread pickup would be a good addition but maybe its best to hope that one day the broken things will get fixed before asking for new ;D
Hood
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Hey would you mind doing a how to use/get threading in mach3?
I am not having happy day time here. got the index 1/rev, got it being seen in mach3....
it just seems on longer threads of 3-4 inches or longer that, the threads start not being uniform,
start to spread out so to speak. I checked the Z, and it moves accurate (shop task), it keeps around 0.001"
per foot of travel. I did look and try that other guys (in the member docs), for the lathe (Rich I think??), but,
my issue still exist. So, since it works for you, and works for Rich, then I am doing something wrong....
scott
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Are you using a recent revision of Mach?
Afraid threading always worked for me even when I was using the PP, I now use the SS and again it works great.
Only setting you need to make sure you have checked is use spindle feedback in sync moves, or something like that, its on the spindle setup page of ports and pins.
One other thing that I think I remember is if you use a VFD and it is compensating for spindle slowdown it may actually adversely affect threading as it may actually make the spindle go faster than the speed it started at. Dont think the driver can handle faster, slower yes but faster no.
Hood
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Scott heres a pic I posted a year or so ago, two done with PP and two with SS.
2mm pitch 140mm long and as you can see there is no variance in pitch as I have them reversed alternately. This was with a 17HP induction motor being driven via an electromagnetic clutched gearbox so no VFD.
http://www.machsupport.com/forum/index.php?action=dlattach;topic=8040.0;attach=6447;image
Hood
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Scott,
an easy way to "Pick up" a thread
I have a how to pick up a thread in the Threading writeup. Guess one could write a macro or wizard to
guide one through the steps. Problem may be how manny times will one ever pick up a thread.
I only had to do it probably two times in the last 10 years. Not being negative on the request, just a comment.
Hey would you mind doing a how to use/get threading in mach3?
Something like a "quick and dirty" how to thread...not sure that would do since the big picture includes so manny things
( i struggled to keep the write up size to 60 pages or so ). Maybe start a new thread and post what your interested in seeing.
So, since it works for you, and works for Rich, then I am doing something wrong
You can move this reply later to a new thread so we don't clutter up what Hood is requesting.
Only set rpm manualy if VFD. The more stable your rpm the better ( Mach is reading the rpm to like 3 decimal places and is
more accurate than any device i had to read the rpm ). Make sure you have the configuration correct see the writeup.
All the testing done was mostly 2" thread lengths and had to satisfy a lead tolerance as defined in the writeup.
I did 4 and 6 inch scribes and they didn't have any lead problems. Accurately measuring the scribed line will tell you a lot as that eliminates
say x axis influence.
More in a new thread when you start it..
RICH
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Feed per rev is also broken. Has anyone talked to Brian and got any answers on fixes?
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Feed per rev is also broken. Has anyone talked to Brian and got any answers on fixes?
In what way? I use FPR exclusively on the lathe and it seems fine here.
Hood
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Well I have had it freak out twice on me when using it. Might have been a CSS issue. I will have to try it again and see.
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CSS doesnt work as it should, thats for sure, it seems to keep a constant feed per min rather than a constant feed per rev. If I recall the start feed when doing CSS is based on what the FPR would be for the spindle speed at the time but the FPR doesnt stay constant as the spindle speeds or slows. This means moving out to in will take a lot longer than a feed from in to out as the former is starting and maintaining a slow feed per min and the latter a faster feed pe min. . FPR in constant spindle mode works well, for me at least, as its the only type of feed I use on the lathe and never had an issue with it.
Hood
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Graham pointed out the freakishly high speeds needed to maintain true CSS as X moves to Zero
So as most peeps cannot reach those speeds can it be made to work as follows
When it starts it uses the minimum speed available and when it reaches the X Zero it will have reached the maximum speed available
This assumes you are feeding towards Zero so though not true CSS it will allow everyone to get the best available speed out of their machine from starting slow to finishing fast
The same applies when turning the OD
Phil
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What do you mean by min speed available?
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I am not following what you are meaning now I read again ;D
CSS is constant surface speed so you are trying to maintain a set amount of material that passes the tool in meters per min or feet per min, so just plucking figures out and saying it will start at whatever revs and finish at max if it goes to zero kind of defeats the point of it.
Max spindle speed should be observed by Mach whether its because you specify a G48 (max) or it is simply the max you have the spindle tuned to .
Hood
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OK real world scenario on my machine
VFD controlled spindle i can have a max speed of 1500 RPM the slowest is 375 RPM controlled by Mach3
I want to face a 150mm dia billet at a CSS of 70 SMM
I start at 150mm X the min speed i can run is 375 RPM (176) gives a feed rate of 176 SMM
When i get to 3mm on X i am only cutting at 14 SMM (7430) in brackets is the desired RPM to maintain 70 SMM
So i have a very small window where i am truly cutting at 70 SMM (60mm dia to 15mm dia)
I agree about still conforming to the Max speed set in G48
So at 375 RPM i would be cutting at 70 SMM at 60mm dia my target and i would stay on target to 15 mm dia when i will be running at 1500 RPM
I hope this makes more sense now as i haven't had the opportunity to use CSS as its broken but if it was working i wouldn't be able to use it as my spindle cannot reach those speeds
But doing it my suggested way, everyone could get the best out of their available spindle speed. The SMM is blended between Min and Max. It may be worth asking Brian if this is an easier way of doing it
Or am i talking gonads as usual. ;D
Phil
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The way it works now (OK, should work...) you will utilize your whole available speed range in the above example. Do you want to restrict it?? Don't follow you.
Dan
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You need a better spindle motor ;)
I will have to read that a few times more later on when I get some time but from first read is that not exactly what it should do if you have a min and max spindle?
Hood
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You need a better spindle motor ;)
I will have to read that a few times more later on when I get some time but from first read is that not exactly what it should do if you have a min and max spindle?
Hood
I wondered how long before you started bragging about your spindle motor. ;D
But the point is i do not know how it should react. :(
Phil
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I never bragged, just simply pointed out that yours is a bit of a sub standard spare part ;D
Hood
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AH HA!! found my issue Hood, and Rich........
I was Using CSS G code generated by my CAM, I swithced to the F/rev and POOF problem when away......
So, I must revise my threading request:
1). Fix CSS?
Rich: I sent you a PM take a peek.
scott
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Great news Scott :)
Hood
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I'm happy you found the culprit Scott. :) Another red note placed in the writeup for future update. ;)
You just can't image how much checking went into getting the thread lead right.
RICH
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A nice improvement for Turn would be on the Tool page. I use slow feed to move close to the stock or an electronic edgefinder, then switch with jog mode to a 0.001" resolution incremental jog and bump it to touch that way. There is no button on the Tool page so you can switch between continuous jog and incremental jog, so I have to keep switching back and forth between the two pages to set multiple tools. Just a thought.
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Holding down the Ctrl key while using the jog buttons will switch you to incremental mode.
Dan