Can any one help

[tequilarose328@yahoo.com]

i need to find out what i can increase my xy spped and z speed to if you can let me know i am v bit carving .1250 into soft pine so if any one can help please let me know thank you

[Brady Watson]

Roger,
What type of machine is it? (PR, PRT, Alpha?)

What version of the control software are you using? DOS or Windows?

How fast are you moving now XY/Z?


-Brady

[tequilarose328@yahoo.com]

i have a bench top i am using dos windows i also use part wizard and i only do v carving into soft pine and the max depth that i go is .1250 the xy speed is 229.1832 and the z is 916.328 that is the uv and the js for the xy is 3.75 and the z is 1.5 thank so so much for responding
Roger Clark

[Brady Watson]

Roger,
You cannot cut faster than about 3IPS with the DOS software before you start losing a lot of steps. Ideally you should be cutting no more than 2.2-2.5 when moving that quickly.

If you want to move a little faster and smoother, upgrade to the PRT Windows control software. You should be able to cut a little quicker and Jog up to 5 IPS.

-Brady

[tequilarose@yahoo.com]

ok sorry brady i am lost i tried to switch the js but it kept going back to the 3.75 and the 1.5 if you can tell me what i am doing wrong let me know i need help and if i may ask were are you from

[Brady Watson]

Roger,
Your file may be over-writing your Move speeds and Jog speeds. Look in the SBP file for MS and JS commands, change and save OR recalculate your toolpath from PartWizard with more reasonable move/jog speeds. You can also hit the spacebar while the file is running, press the 'i' key to insert command, then type in the appropriate move speed, IE MS 2.0,1.0

I have to say that you are moving too quickly for a v-carve toolpath. It sounds to me that you are going to sacrifice quality for speed. Moving 3 IPS or faster on a PRT is not a good idea no matter what you are cutting. The motors don't have the torque to hold position when changing direction...you lose steps & ruin your part.

-Brady

[srwtlc]

Hey Roger,

This is Scott over in Greenwood, Wi. The offer to come over there and help you out sometime is still open, and/or for you to come to my shop. I'm just a couple of hours away!

Scott

[roger clark (Unregistered Guest)]

hello i need some help getting my x and y distance right i can tell the machine to run 8 inches on the x or y and it will only go 6.5 inches how do i fix this problem

[srwtlc]

I spoke with Roger tonight and I think we've got him squared away, but just to be sure, does anyone know right off what the unit values are for a Benchtop PRT(running the DOS version). I've got a PRT96 using the windows version and just pulled the default values out of there for him. It appeared to work, but I just wanted to double check.

Thanks,
Scott

[Brady Watson]

XY 229.1832, Z 916.7328

I just set one of these up running 2.39_m the other night. There was an issue with it running on 2000, so I had him load 98_SE and it worked perfectly.

-Brady

[gerald_d]

I think it would be really useful if ShopBot published a list of known unit values. I know there could be confusion about dates and model numbers, but I am thinking of a list where the dates and model numbers are not even shown....simply a list of defined numbers.

In the above case we have Roger who knows that his bot runs approx 6.5 inches when it should go exactly 8 inches. He can read the current unit value from his machine and calculate a new value of say 54693. If we had this table, he could look up and see that 54700 is a standard value, being close to his calculation, but obviously the more accurate figure. Dates and model numbers don't have to come into it at all - just a list of known accurate values.

[gerald_d]

Okay, if one takes the following variables: Pinion gears have been mentioned with 18,20,25,30 & 36 teeth. Some motors were direct drive, and some had 3.6:1 or 7.2:1 gearboxes. Motors/drivers were either 1/2, 1/4, 1/8 or 1/16 stepping. Then the following unit values are all possibilities:
63.662
70.7355
76.3944
84.8826
91.5733
101.859
114.592
127.324
141.471
152.789
183.347
229.183
254.648
305.578
366.693
407.437
458.366
509.296
565.884
611.155
733.386
814.874
916.733
1018.59
1131.77
1466.77
1833.47
2037.18
2933.55
4074.37
And nobody should have a unit value anywhere between these values. Is that right? This numbers are far enough apart (+10%) so there should be no confusion which number is the right one, if you are "calibrating" with a tape measure. Thanks to those that helped to calculate this list.

[kaaboom_99]

Gerald, I am surprised. I see my numbers on your list. I set up my PRT96 by using the right angle 3,4,5 rule and ended up tweaking values until it lined up. As it turns out, my values (183.347, 183.347, 916.7329) fall in the list you have given. Where were you 4 years ago? You could have saved me some work.
BTW, I personally appreciate all wealth of knowledge that you contribute to this forum.

[gerald_d]

Hi Perry. I do believe that such a list would be very valuable to someone fiddling with unit values. But here on the Forum it will just get buried under a misleading thread title.

[mikejohn]

Gerald
About things getting 'lost'
For my own use, I'n trying to sort out the wheat from the chaff with the technical stuff on the Forum.
The problem is, near identical discussions appear in different threads, whilst associated ideas can appear anywhere.
If I (or anyone) could create a 'contents page' for the technical bits of the Forum
a. Where might it be posted?
b. How could it be kept up to date?
c. Is it needed?
I am doing it outside of the forum (hyperlinking in excel) This works for me, but something different is needed for the Forum.
....Mike

[normand]

maybe a good start would be if the projet picture would be keep together only the pictures from there we could jump to the thread. Also if there was a place for anyone to put up a link to their web site now again only web site with thing made with shopbot for a start.Now where have I seen pictures of the probe's gut again?

[gerald_d]

Mike, I gave up long ago on trying to steer folk to better threads. Have also suggested that there should be a FAQ section, and that idea got no support. Without proper moderation, this board is very much a free-for-all. (Except for the spammers that get censored)

[normand]

One more a place where we could put sbp files for sharing One picture and the files. All comment would be somewere else so after we talk about it for a week it would not end up at the bottom of the page or the top.

[paco]

The search tool is quite effective for this purpose... for me though... but I sometime decide to start "a new thread" for "up-to-date posting" since some tech. and non-tech aspects of a thread may have change some over time... chronology is part of the ordering in the TSB forum I believe! Threads that deviate from their start subject are just how poeple wish 'em to be and that make the discussion more living! Just like right now!!!

[garyb (Unregistered Guest)]

I think it would help if the threads were archived by year. You can still search the archives but it would clean up the board.

Of course some brave sole could always make the offer to SB to be a moderator.

[mikejohn]

I think Paco has a point when he says Threads that deviate from their start subject are just how poeple wish 'em to be and that make the discussion more living!
I am as guilty as anyone for introducing deviation and variation (and Limey humour)

When I'm looking for guidance, however, I find it useful to gather the relevant bits in one place.
Gerald
A F.A.Q. section would be a great idea, seeing how often the same question is asked. Again, I have been guilty of this

..........Mike

[paco]

Indeed a F.A.Q. is a good idea!... but one is always free to answer or not a question he believe to be already asked/answered... I think that most of us like to be answered "personnaly" even if the answer is already available since our needs can vary some and the way we figure an answer can vary too... this make the TSB forum more like consulting people rather than a "device/computer/librairy"...
I believe you should'nt feel guilty being yourself Mike... re-asking is just "humanly" normal!

[gerald_d]

Hey, cut the noise in this thread - the Springboks are leading 38 - 10 against Scotland. (the "land" is in white characters)

[mikejohn]

Gerald
I can't believe you would divert this thread to bring such news!
Good colour scheme,though
Don't mention England
......Mike

[gerald_d]

We won't talk about the war either...

Speaking of which..;

The noble British came out here in 1899 to fight the Boers - wearing red tunics so that one would not notice the blood if they were injured. But, after facing the guerilla tactics of the Boers, they soon started wearing khaki trousers, so that one could not notice............

Anyway, for the non-participants reading this, a rugby match between South Africa and England is a re-enactment of that war. Last week we let Mike's side win - just in case they had a shortage of khaki trousers.

[dvanr]

On the subject of organizing info .

Maybe Shopbot should start a Wiki rather than a FAQ. What is a wiki? (http://wiki.org/wiki.cgi?WhatIsWiki)

the "http://c2.com/cgi/wiki?WikiDesignPrinciples" link on the page seems to cover this forums needs.

This is what another wiki page looks like (http://en.wikipedia.org/wiki/Main_Page) . Note the sidebar where recent changes is listed. Members /contributors can monitor changes, in the event of vandalism the board can be rolled back to a known point.


DvanR
PS don't get excited about the Portland Pattern repository, its not what you hope it is

[gerald_d]

Dick, the Wiki principles are very easy to implement on this current Forum, if the members are promoted to moderators. A moderator on this Forum can click on the little "Edit Post" icon (that you see top right of every single post) and edit that post, even if it was not his/her own post. Some Discus boards have extra icons up there; Delete post, Move post, Print post, Send post. Visible moderation does unfortunately lead to a lot of argument. Some of us are rather picky about our posts being edited by others.
.