goscommons / CNC-Plasma-Table

An open source CNC torch table for metal cutting
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Testing-Prototyping documentation of first prototype #28

Closed jurra closed 6 years ago

jurra commented 6 years ago

I quote @polemidis from the chat

There are many things to capture from @polemidis reflections, for now I copied the chat.

so. because I am getting old. And I do not want to play. And I want things to get done. And because I wasted all my day plus a few days before. I decided to buy the correct equipment no more toys. My purpose today was to make a few consistent cnc moves without the plasma on. The reason is that if the torch is on, every little thing that will go wrong will cost money on wasted metal. And the other reason is that if we are going to sell that kit, we want it sturdy. Other than the software problems that was due to my lack of experience(not any more!haha) on the new CAM software I am using (SheetCAM) I faced a loot of other minor problems related to the a) stepper drivers b)grbl firmware I am going to order new proper stepper drivers for now. And a great consequence also happen, the proma elektronica just today released a new cnc controller and wanted 3 persons to test them and the price was half of the market price at around $100. I am going to buy that also. The cnc shield was already under suspension because of the required crimping, the tiny little cables, so that may be a good match.

Whoever wants to read further, the stepper drivers I am using now, are the DRV 8825. The big drawback is that the user has to tweak their voltage with a screw and the max Amps they could deliver to the stepper motors was 1.5A without a cooling fan, 2.2A with a fan. The new ones will be the TB6600. 4Amps easy. No fan is needed, and the motors mount with screw-type connectors. Check them out. They are 10x more expensive than the DRV8825 but their cost is still insignificant $14 from usa, $6 shipped from china