Need Help!- Setting inch per minute cutting speed

[Edwardo]

Hi all, im not having any problems with my Dynatorch but i am trying to figure out my cutting speed settings. Right now it is still set up the way Leon told me to do it.

Max Velocity 10" per sec
Rapid Move 10" per sec
Cutting Move 8" per sec

With cutting move at 8" per sec does that mean then when im cutting at 100% on my sceen i am cutting at 480" per minute?

In sheetcam i have my cutting speed set at 100" per minute, would that override the machine setting and cut at 100" per min or vice versa ?

Thanks
EDD

[magma-joe]

Hi Edwardo, I can't offer much help on these setting as I have not "explored" them on my machine. I do know if you open the help section in the dynatorch cutting screen there is some information on these settings. I noticed in the video you posted that you have the dual motor drive, drop side table. I have the single side motor drive standard table. I just ordered a dual motor drive drop side "conversion" for my 5 x 10 table. I purchased my gantry about 3 years ago. Until recently I was not aware of all the improvments that had been made to the Dynatorch machines. With the conversion comes an upgraded 24 pitch gear rack. I am also adding the Dash unit and when the money comes in (it seems to be on a slow boat from China right now) I will add the scibe unit. I like the fact that when ever Dynatorch upgrades their machine they make sure that it can be retrofit to the older versions. Let us know what you find out on the settings.

[Edwardo]

Thnx Joe

I havent really bothered with the speed settings up till now either, if i had dross i would just speed it up on the DT screen or what ever i needed. Reason i was asking was asking is a guy gave me some 3/16 alum to play with and according to Hypertherms chart i needed to cut +- 300" min with a 80 amp nozzle, i have been itching to crank up my 1250 to see what it can do and besides fine cut gear all i have is some 80amp nozzles and sheilds that came with my cutter, anyways to make a long story short i set everything to Hypertherms guide except i winged it on the speed and let er go and it made a perfect cut, no dross at all, nothing!! only a little where the alum was touching the slats, little angle on it but nothing serious, i only have a small fan on my airhandler so it was like a shuttle launch in here for a while. I know 80 amp is over kill but its all i had and did a nice job. I attached a few pics, sorry theyre not that great of quality, but i didnt clean these cuts at all, thats the way they came off the table. Also i was going through the help section like you mentioned and relise im cutting backwards, probly why im getting the taper on the cuts so i'll change that around next time i fire up. I agree with everything you say about Dynatorch, im glad i bought from them.

Regards
EDD

[magma-joe]

Edwardo, your cuts look very nice and dross free in the pics. I rarely use 80 amp consumables. They do pack some punch and the sound / smoke levels are much higher than the 40 amp fine cut I use most of the time. I have expiermented on some 3/4" before and was surprised how nice the cut was. I normally cut .080 aluminum. When ever I do cut other thicknesses of metal that I am unfamiliar with I use my joy stick control and make some straight cuts on the end of the sheet to "dial" in the best cutting parameters before cutting my actual part.

I noticed in your picture you have the 24 pitch gear rack on your machine. This is what I will be using for my upgrade from standard to the dual motor drive drop side table. Since I built my own water type table I will have to make some modifications to mount the slave side gear rack. One question I have is how much higher is the working table surface or (top of the slats) from the surface of the slave side gear rack that the cam followers ride on. This measurment will give me an idea of where the the rack will have to be mounted. It will be a week or so before the conversion parts arrive. With this measurment I will have a head start on what modifications need to be done. I included a picture of my table.
Thanks Edwardo

[Edwardo]

Hi Joe, I attached a couple pics for you on the height, hope its what you need.. The top of my slats are 2-1/8" above the rail.

Regards
EDD

[magma-joe]

Thanks Edwardo! Thats exactly the information I needed. It will help speed up the conversion.

[Edwardo]

By the way, thats a good looking table... i almost modified my table over to a water table but then decided not to. Would be nice to see some pics while you are changing it over to a drop side.

Regards
EDD

[morvaman]

I'm thinking of doing a dual drop for my next table like this one at www.fastcutcnc.com but without the belt.

[Edwardo]

Duo drop like that would give you better access to the table, especially on a bigger table like yours.

[magma-joe]

Thanks Edwardo, I will post some pics of the conversion. I do like the water table. It works very well and was much less costly and bulky than the air handler. I use the Plasma Quench additive from Koal Industries which also works great. Just add water when it evaporates.

Morvaman, take a look at the new Tracker Cnc table, they also have incorporated the dual drop on both sides like Flashcut. I am not sure how they did it but it sure makes for a nice design for loading. Something else I have seen that looks very handy for loading is a table extension so you can park the gantry completly off the table.



http://www.trackercnc.com/macpicstable.htm

[morvaman]

The tracker design looks good joe. I am thinking of using a open type pillow block on a one piece support rail on the drive side. The slats supports will be mounted so the slats will sit flush to the top of the table and the rails will be down about 4" to 5" from the top of the table along the x. I may have to shorten the Y to make this work. Hope you can picture it.

[Edwardo]

Im starting to really like working with alum, clean up and finish is easier and it wont rust, made this today out of the same 3/16 peice i had, used the 80 amp consumables for wider cut lines.. i called my supplier and a 4x8x3/16 sheet is $156.00, its actually not much more than steel.... guess i'll have to learn to weld alum if i go this route..

EDD